Compositional Formula Research Articles

Evidence of ferromagnetic clusters in magnetic Weyl semimetal Co3Sn2S2

Cobalt based sulfides of compositional formula Co3A2S2 (A = Sn and In) are endowed with frustrated kagome lattice structure and a plethora of novel phenomena due to the topological band structure. We report on the detailed exploration of magnetic properties of single crystals of ferromagnetic Weyl semimetal Co3Sn2S2. A non-linear behaviour observed in the inverse susceptibility above the critical temperature TC in the paramagnetic state corroborates to the presence of short-range ferromagnetic clusters above TC in Co3Sn2S2. The upward deviation indicates the antiferromagnetic interactions between the nearest neighbouring magnetic clusters. The slow spin dynamics behaviour above TC in isothermal remanent magnetization provide another evidence of ferromagnetic clusters. The magnetic hysteresis loops represent the magnetization reversal which, in turn, also confirm the short range magnetic correlations. Further, non-linear isothermal magnetization curves and zero spontaneous magnetization derived from corresponding Arrott plots above TC prove the short range ferromagnetic clusters in Co3Sn2S2. Our experimental results emphasize an intuitive understanding of the complex nature of magnetism present in Co-based shandite systems.

Asphalt complex cracks' sensitivity to temperature and crack depth and adjustment of the composite stress intensity factor

This paper is based on the fracture mechanics K-criterion with the composite stress intensity factor solution formula. The influence of temperature and depth in developing complex crack instability and diffusion in asphalt pavements is investigated. The crack composite stress intensity factor and development pattern are analyzed. The finite element modeling analyzes the change in stress intensity factor values at different temperatures and cracks depths. The composite stress intensity factor's temperature effect factor (t*) and crack depth effect factor (d*) are derived, and the calculation formulae are optimized. The study results show that among the complex cracks in asphalt pavements, the type I crack tip stress intensity factor (KⅠ) is the most seriously affected by temperature and crack depth and is also the main controlling factor of crack development. Type II crack tip stress intensity factor (KⅡ) is not significantly influenced by temperature but tends to rise and fall as the crack depth increases. Type III crack tip stress intensity factor (KIII) is smaller than KⅠ and KⅡ. It has less influence on the development of complex cracks in asphalt pavements. t* and d* were introduced to derive the formula for the modified composite stress intensity factor (Keff*). The formula was verified to calculate the composite stress intensity factor at different temperatures and crack depths and to study the cracking pattern of asphalt pavements.

Comparative Review of Effects of Pien Tze Huang and AnGong NiuHuang Pill and their Potential on Treatment of Central Nervous System Diseases.

The ancient composite formulae Angong Niuhuang pill and Pien Tze Huang, which were used a few hundred years ago to treat febrile disease and inflammation, respectively, are found to exert effects benefiting other neurological diseases and conditions. This short review introduces the main constituents of the two formulae, looking into both the cumulative synergetic and possible individual effects of each herb or animal apcoien. In essence, the main effects of Angong Niuhuang pill include anti-inflammation, antioxidation, anti-cell death, anticonvulsion, antiedema, antipyretic, antithrombotic, antimicrobial (bacteria, viruses, fungi), neuroprotective effects, and cardiovascular protection. The main effects of Pien Tze Huang include anti-inflammation, antioxidation, anti-cell death, antithrombotic, antimicrobial, neuroprotective effects, and cardiovascular protection. Comparing both composites, similarities in the effects and part of the components are found, showing some pharmacological evidence. This review casts light on research on the effects of neuroprotective and cardiovascular protective mechanisms as well as treatment mechanisms for cerebral accidents from the integrative medicine perspective.

Physicochemical, functional and sensory properties of wheat noodles substituted by sorghum and mung bean flours

Noodles are flour-based processed products that are generally served as an alternative food to carbohydrates dense products. Nowadays, carbohydrate-based processed products, such as the production of non-wheat noodles and the substitution of non-wheat carbohydrate sources, are developed, mainly through the use of local food commodities as alternatives. The purpose of this research was to investigate the physicochemical qualities of wheat noodles substituted for local food ingredients such as sorghum flour and green beans via sticking properties, cooking quality, proximate analysis, and sensory characteristics. Resistant starch and dietary fibre content were the functional features studied. Five formulas were established, each with a different amount of wheat flour, sorghum flour and mung bean flour used in the processing, namely N1 (50:20:30), N2 (40:30:30), N3 (30:40:30), N4 (20:50:30), and N5 (10:60:30). The peak viscosity of the five composite flour formulae was 1421-1778, the breakdown value was 454-535, and the ultimate viscosity was 1967-2490, with a cooking loss of 10.69-23.21%. According to proximate analysis, the formulated noodles provide complete nutritional content to meet nutritional adequacy, namely 375-381 kcal/100 g. It not only has a great nutritional value, but it also has strong physiological advantages for the body due to the high concentration of dietary fibre (9.6-9.8%) and resistant starch (14.93-15.01%). The taste, texture, and aroma of the sample formulae N2, N3, and N5 are comparable to wheat-based noodles. The five wheat noodles substituted by sorghum and mung bean flour formulations were potentially developed into functional products with comprehensive nutritional content, high dietary fibre, and resistant starch. Further research is needed to confirm its functional properties on health.

On the Composition Structures of Certain Fractional Integral Operators

This paper investigates the composition structures of certain fractional integral operators whose kernels are certain types of generalized hypergeometric functions. It is shown how composition formulas of these operators can be closely related to the various Erdélyi-type hypergeometric integrals. We also derive a derivative formula for the fractional integral operator and some applications of the operator are considered for a certain Volterra-type integral equation, which provide two generalizations to Khudozhnikov’s integral equation (see below). Some specific relationships, examples, and some future research problems are also discussed.

Preparation and characterization of micro/nanocellulose reinforced PVDF/wood composites

Polyvinylidene fluoride (PVDF) is commonly used in the chemical, electronic, and petrochemical industries because of its chemical and physical attributes. This study aimed to make novel PVDF-based composite with a high loading of silanized wood powder and micro/nanocellulose fibers, where glycerol acts as both a dispersant and a plasticizer all-in-one composite application for the first time. The purpose was also extended to systematically investigate their mechanical properties and melt flow. Results have demonstrated the efficiency of utilizing the cellulose fibers in bio-composites. With the addition of 30 wt% of filling materials, When the content of silanized cellulose fibers in glycerol dispersion is 25 wt%, the flexural strength and tensile strength reach the maximum value 72.30 MPa and 52.28 MPa. The experimental results indicate that silanized micro/nanocellulose fiber-reinforced PVDF/wood composites are a promising composite formula to help improve performance and reduce costs. It is an excellent example of utilizing biomass resources as a renewable/recyclable, sustainable and low-cost material to reduce the use of petroleum-based polymer, and improve the mechanical properties of composites.

On the Algebra of Operators Corresponding to the Union of Smooth Submanifolds

For a pair of smooth transversally intersecting submanifolds in some enveloping smooth manifold, we study the algebra generated by pseudodifferential operators and (co)boundary operators corresponding to submanifolds. We establish that such an algebra has 18 types of generating elements. For operators from this algebra, we define the concept of symbol and obtain the composition formula.

Comparison of multidimensional mass transfer models of formaldehyde emissions originating from different surfaces of wood-based panels

Indoor decoration causes a large amount of formaldehyde to be concurrently released from different surfaces of wood-based panels. However, this phenomenon has rarely been described with two- or three-dimensional mass transfer models. In this paper, multidimensional mass transfer models of formaldehyde emissions originating from different surfaces of building materials are first established. Moreover, mass balance integral equation is introduced. Experiments of formaldehyde emissions in the environmental chambers are numerically simulated by combining the parameter estimation method, composite Simpson formula and finite difference method, whose convergence and stability are verified. The results indicated that the proposed models suitably agreed with the experimental and literature data. Furthermore, the multidimensional mass transfer model confirmed that formaldehyde released from sides should not be ignored. Compared with the one-dimensional model, the three-dimensional model can more accurately simulate the release data of formaldehyde from wood-based panels. Subsequently, the variation trend between the chemical reaction formation rate and physical diffusion rate of formaldehyde is revealed.

Ventilatory settings in the initial 72 h and their association with outcome in out-of-hospital cardiac arrest patients: a preplanned secondary analysis of the targeted hypothermia versus targeted normothermia after out-of-hospital cardiac arrest (TTM2) trial

PurposeThe optimal ventilatory settings in patients after cardiac arrest and their association with outcome remain unclear. The aim of this study was to describe the ventilatory settings applied in the first 72 h of mechanical ventilation in patients after out-of-hospital cardiac arrest and their association with 6-month outcomes.MethodsPreplanned sub-analysis of the Target Temperature Management-2 trial. Clinical outcomes were mortality and functional status (assessed by the Modified Rankin Scale) 6 months after randomization.ResultsA total of 1848 patients were included (mean age 64 [Standard Deviation, SD = 14] years). At 6 months, 950 (51%) patients were alive and 898 (49%) were dead. Median tidal volume (VT) was 7 (Interquartile range, IQR = 6.2–8.5) mL per Predicted Body Weight (PBW), positive end expiratory pressure (PEEP) was 7 (IQR = 5–9) cmH20, plateau pressure was 20 cmH20 (IQR = 17–23), driving pressure was 12 cmH20 (IQR = 10–15), mechanical power 16.2 J/min (IQR = 12.1–21.8), ventilatory ratio was 1.27 (IQR = 1.04–1.6), and respiratory rate was 17 breaths/minute (IQR = 14–20). Median partial pressure of oxygen was 87 mmHg (IQR = 75–105), and partial pressure of carbon dioxide was 40.5 mmHg (IQR = 36–45.7). Respiratory rate, driving pressure, and mechanical power were independently associated with 6-month mortality (omnibus p-values for their non-linear trajectories: p < 0.0001, p = 0.026, and p = 0.029, respectively). Respiratory rate and driving pressure were also independently associated with poor neurological outcome (odds ratio, OR = 1.035, 95% confidence interval, CI = 1.003–1.068, p = 0.030, and OR = 1.005, 95% CI = 1.001–1.036, p = 0.048). A composite formula calculated as [(4*driving pressure) + respiratory rate] was independently associated with mortality and poor neurological outcome.ConclusionsProtective ventilation strategies are commonly applied in patients after cardiac arrest. Ventilator settings in the first 72 h after hospital admission, in particular driving pressure and respiratory rate, may influence 6-month outcomes.

Healthcare Resource Utilization and Cost Comparisons of High-Protein Enteral Nutrition Formulas Used in Critically Ill Patients

Background: High-protein enteral nutrition is advised for patients who are critically ill. Options include immunonutrition formulas of various compositions and standard high-protein formulas (StdHP). Additional research is needed on the health economic value of immunonutrition in a broad cohort of severely ill hospitalized patients. Objective: The study goal was to compare healthcare resource utilization (HCRU) and cost between immunonutrition and StdHP using real-world evidence from a large US administrative database. Methods: A retrospective cohort study was designed using the PINC AI™ Healthcare Database from 2015 to 2019. IMPACT® Peptide 1.5 (IP) was compared with Pivot® 1.5 (PC), and StdHP formulas. Inclusion criteria comprised patients age 18+ with at least 1 day's stay in the intensive care unit (ICU) and at least 3 out of 5 consecutive days of enteral nutrition. Pairwise comparisons of demographics, clinical characteristics, HCRU, and costs were conducted between groups. Multivariable regression was used to assess total hospital cost per day associated with enteral nutrition cohort. Results: A total of 5752 patients were identified across 27 hospitals. Overall, a median 7 days of enteral nutrition was received over a 16-day hospital and 10-day ICU stay. Median total and daily hospital costs were lower for IP vs PC ($71 196 vs $80 696, _P_&lt;.001) and ($4208 vs $4373, _P_=.019), with each higher than StdHP. However, after controlling for covariates such as mortality risk, surgery, and discharge disposition, average total hospital cost per day associated with IP use was 24% lower than PC, and 12% lower than StdHP (_P_&lt;.001). Readmissions within 30 days were less frequent for patients receiving IP compared with PC (_P_&lt;.02) and StdHP (_P_&lt;.001). Discussion: Choice of high-protein enteral nutrition for patients in the ICU has implications for HCRU and daily hospital costs. Considering these correlations is important when comparing formula ingredients and per unit costs. Among the enteral nutrition products studied, IP emerged as the most cost-saving option, with lower adjusted hospital cost per day than PC or StdHP. Conclusions: Using a select immunonutrition formula for critically ill patients may provide overall cost savings for the healthcare system.

Healthcare Resource Utilization and Cost Comparisons of High-Protein Enteral Nutrition Formulas Used in Critically Ill Patients.

Background: High-protein enteral nutrition is advised for patients who are critically ill. Options include immunonutrition formulas of various compositions and standard high-protein formulas (StdHP). Additional research is needed on the health economic value of immunonutrition in a broad cohort of severely ill hospitalized patients.Objective: The study goal was to compare healthcare resource utilization (HCRU) and cost between immunonutrition and StdHP using real-world evidence from a large US administrative database.Methods: A retrospective cohort study was designed using the PINC AI™ Healthcare Database from 2015 to 2019. IMPACT® Peptide 1.5 (IP) was compared with Pivot® 1.5 (PC), and StdHP formulas. Inclusion criteria comprised patients age 18+ with at least 1 day’s stay in the intensive care unit (ICU) and at least 3 out of 5 consecutive days of enteral nutrition. Pairwise comparisons of demographics, clinical characteristics, HCRU, and costs were conducted between groups. Multivariable regression was used to assess total hospital cost per day associated with enteral nutrition cohort.Results: A total of 5752 patients were identified across 27 hospitals. Overall, a median 7 days of enteral nutrition was received over a 16-day hospital and 10-day ICU stay. Median total and daily hospital costs were lower for IP vs PC ($71 196 vs $80 696, P<.001) and ($4208 vs $4373, P=.019), with each higher than StdHP. However, after controlling for covariates such as mortality risk, surgery, and discharge disposition, average total hospital cost per day associated with IP use was 24% lower than PC, and 12% lower than StdHP (P<.001). Readmissions within 30 days were less frequent for patients receiving IP compared with PC (P<.02) and StdHP (P<.001).Discussion: Choice of high-protein enteral nutrition for patients in the ICU has implications for HCRU and daily hospital costs. Considering these correlations is important when comparing formula ingredients and per unit costs. Among the enteral nutrition products studied, IP emerged as the most cost-saving option, with lower adjusted hospital cost per day than PC or StdHP.Conclusions: Using a select immunonutrition formula for critically ill patients may provide overall cost savings for the healthcare system.

Performance Evaluation of Green Cushion Gum Composite Formulated Based on Hybrid Filler and Curing System

Cushion gum is a type of rubber composite material used as adhesive in the manufacture of retread tires. Therefore, cushion gum should have good processability and mechanical characteristics, particularly tensile property, and adhesion strength. The effect of hybrid filler and curing system on the performance of green cushion gum composite was investigated to determine the appropriate green cushion gum formula designed at a laboratory scale. The content of CB N330/lignin in hybrid filler was arranged at 40/10 phr and 50/10 phr. Meanwhile, the curing system was performed semi-efficient (CBS/S 1.6/1.6 phr) and conventional (CBS/S 1.6/2.2 phr). Green cushion gum composite was also formulated using pine tar oil as a bio plasticizer. Referred to the curing characteristic and mechanical property test result, it showed that green cushion gum composite formula coded by RF1 which composed of CB N330/lignin as 50/10 phr and applied conventional curing system which ratio of CBS/S as 1.6/2.2 phr was regarded as the acceptable combination in designing green cushion gum composite formula. Higher CB N330 loading in hybrid filler composition and conventional curing system attributed to the relatively high crosslink density indicated by MH-ML value. Consequently, green cushion gum composite was obtained using the RF1 formula that has a better optimum curing time accompanied by good tensile property and adhesion strength. The composite was also comparable to conventional commercial cushion gum.

Development of Formulas for Calculating L3 Skeletal Muscle Mass Index and Visceral Fat Area Based on Anthropometric Parameters.

BackgroundThe anthropometric index is not accurate but shows a great advantage in accessibility. Simple body composition formulas should be investigated before proceeding with the universal nutrition screening.Materials and MethodsClinical data of patients with a malignant tumor of the digestive system were collected. SliceOmatic 5.0 software (TOMOVISION, Canada) was used to analyze abdominal CT images and taken as references. A linear regression analysis was adopted to establish the formula for calculating skeletal muscle index (SMI) and visceral fat area (VFA). In addition, the relweights function was adopted to measure the contribution of each variable.ResultsIn total, 344 patients were divided into the training set and 134 patients into the validation set. The selected formulas were SMI.pre = 0.540 × weight (kg) – 0.559 × height (cm) – 13.877 × sex (male = 1, female = 2) + 123.583, and VFA.pre = 5.146 × weight (kg) – 2.666 × height (cm) + 1.436 × age (year) + 134.096, of which the adjusted R2 were 0.597 and 0.581, respectively. The “weight” explained more than 80% of R2 in the prediction of VFA. In addition, “sex” occupied approximately 40% of R2 in the prediction of SMI. The paired t-test showed no significant difference between the real measured indices and the predicting ones (p = 0.123 for SMI and p = 0.299 for VFA). The logistic regression analysis exhibited similar diagnostic efficacy of the real measured parameters and formulas.ConclusionThe SMI and VFA formulas were developed through basic indices, such as weight, height, sex, and age. According to the contribution of each variable, weight should always be focused on preserving appropriate muscle and adipose tissue.

Preparation of manganese-doped tin oxide nanoparticles for catalytic reduction of organic dyes

Sol-gel method is used to fabricate morphologically controlled manganese-tin (Mn-Sn) bimetallic nanoparticles using manganese nitrate and tin chloride as precursors. Energy dispersive X-ray spectroscopy (EDX) is used to study the elemental composition and chemical formula of the synthesized products. Scanning transmission electron microscopy (STEM) is used to characterize the morphology of products. The catalytic property of Mn-Sn bimetallic nanoparticles is enhanced due to synergistic effect of both metals. The morphology of catalyst and the structure of organic dyes and nitro-compounds are used to compare the values of apparent rate constant, reduction time and percentage reduction.

Quality Grade Evaluation of Niuhuang Qingwei Pills Based on UPLC and TCM Reference Drug—A Novel Principle of Analysis of Multiple Components in Ready-Made Chinese Herbal Medicine

Ready-made Chinese herbal medicine (RMCHM) is one of the most common types of synergistic herbal medicine used worldwide. It is based on composite herbal formulae (CHF), which makes quality control of this kind of traditional Chinese medicine (TCM) difficult, let alone distinguishing the good from the bad. Taking Niuhuang Qingwei Pills (NHQWP) as an example, this study reported the development of a novel principle of analysis of multiple components in RMCHM. Experimental procedures involved the selection of high-quality Chinese materia medica (CMM, individual medicinal plant parts used in the NHQWP) to prepare three batches of TCM reference drugs (TCMRD). Pure compounds of the active ingredients identified in the herbal formula including berberine hydrochloride, geniposide, forsythiaside A, 3,5-O-dicaffeoyl quinic acid, hesperidin, baicalin, glycyrrhizic acid, and chrysophanol in the three TCMRDs were analyzed as well as those in 49 batches of commercial products from 18 manufacturers by ultra-performance liquid chromatography (UPLC) method combined with wavelength switching. Using the TCMRD as the scientific ruler, quality grade specifications of NHQWP were proposed by comprehensive analysis of multiple components. Accordingly, 13, 28, and 8 batches of samples were primarily rated as first-grade, second-grade, and unqualified, respectively.

Type 1 diabetic body composition characterization by different methods: case report

Introduction: Several body composition formulae exist. Otherwise, no one is specific to type 1 diabetic which has been using in gyms and health places, but without scientifical comparison to analyze with gold standards. Objective: to characterize the body composition of an individual with DM1 and to compare it by different methods of body composition assessment. Methods : First day, after anamneses, it was made basic anthropometric measurements (weight, height, perimeters, and skinfolds) and Dual-energy X-ray absorptiometry (DXA). Three formula were used to compare with a gold standard (DXA). Descriptive values were used to analyze de comparisons . Results: DXA has shown 26.6%, 20.7 kg, and 57.2 kg to body fat percentage, Fat mass and Lean Mass, respectively. Deurenberg, Weststrate &amp; Seidell shown 22.0%, 17.8 kg and 63.2kg. Jackson &amp; Pollock, 35.9%, 29.0 kg and 52.0. Finally, Katch &amp; McArdle, 19.0%, 15.4 kg and 65.6 kg . Conclusion: The equation of Deurenberg, Weststrate, and Seidell (1991) presented the lowest delta of variation in relation to the body composition variables obtained by DXA. Thus, it is also possible to perform a body composition in people with type 1 diabetes through simpler techniques of assessment, such as equations based on body perimeter measurements and skinfolds.

Predicting Milling Stability Based on Composite Cotes-Based and Simpson's 3/8-Based Methods.

Avoiding chatter in milling processes is critical for obtaining machined parts with high surface quality. In this paper, we propose two methods for predicting the milling stability based on the composite Cotes and Simpson’s 3/8 formulas. First, a time-delay differential equation is established, wherein the regenerative effects are considered. Subsequently, it is discretized into a series of integral equations. Based on these integral equations, a transition matrix is determined using the composite Cotes formula. Finally, the system stability is analyzed according to the Floquet theory to obtain the milling stability lobe diagrams. The simulation results demonstrate that for the single degree of freedom (single-DOF) model, the convergence speed of the composite Cotes-based method is higher than that of the semi-discrete method and the Simpson’s equation method. In addition, the composite Cotes-based method demonstrates high computational efficiency. Moreover, to further improve the convergence speed, a second method based on the Simpson’s 3/8 formula is proposed. The simulation results show that the Simpson’s 3/8-based method has the fastest convergence speed when the radial immersion ratio is large; for the two degrees of freedom (two-DOF) model, it performs better in terms of calculation accuracy and efficiency.

A review on: Neocov is not new COVID it’s old and similar to SARS

Recently, Coronavirus has given great attention from the biomedical community based on the appearance and isolation coronavirus that infects humans. To understand the new MERS-COV behaviour appears to require different knowledge levels (epidemiologists, antigenic, and pathogens), and this knowledge can be produced from the most related viruses. In this study, we direct to compare between 3 species of Coronavirus, namely Middle Eastern respiratory syndrome (MERS-COV), severe acute respiratory syndrome (SARS-COV), and Neocov regarding all genomes and 6 similar proteins (E, M, N, S, ORF1A, and ORF1AB) use different bioinformatics tools to provide a better understanding of the relationship between 3 viruses at nucleotide and amino acids. All sequences have obtained from the National Center Biotechnology Center (NCBI). Greetings to target genomes phylogenetic analysis shows that MERS and SARS-COV is closer to each other compared to Neocov, and the latter has a relatively longest time. We found that all phylogenetic methods in addition to all parameters (physical and chemical properties of amino acids such as amino acid, molecular weight, atoms the composition, theoretical pi, and structural formula) show that Neocov protein is the most related to MERS-COV. All phylogenetics trees (with the maximum-possibility method and joining neighbours) show that Protein Neocov has less evolution changes except ORF1A only with the maximum possible method. Our results show a high similarity between the structural protein of the virus responsible for the virus infectivity; Therefore, we hope Neocov will appear faster in human-related infections.

Steric hindrance effect of Schiff-base ligands on magnetic relaxation dynamics and emissive behavior of two dinuclear dysprosium complexes

The self-assembly reactions between mixed-ligand and tetrahydrate dysprosium acetate in the presence of mixed organic solvents lead to two structural similar dinuclear dysprosium complexes with composition formulas of Dy2(L1)2(L2)2(CH3OH)2·CH2Cl2·CH3OH (1) and Dy2(L1)2(L3)2(CH3OH)2·CH3CN (2), where L1, L2 and L3 represent the deprotonated form of 4-tert-butyl-2-(7-methoxybenzo[d]oxazol-2-yl)phenol, (E)-1-(((3,5-di-tert-butyl-2-hydroxyphenyl)imino)methyl)naphthalen-2-ol and (E)-2,4-di-tert-butyl-6-((2-hydroxybenzylidene)amino)phenol. The tiny difference of the core structure of 1 and 2 is derived from the steric hindrance of Schiff base ligands L2 and L3. Dynamic magnetic measurements reveal that 1 and 2 show frequency-dependent out-of-phase alternating-current susceptibility signal peaks at different temperatures under zero dc field, diagnostic of single-molecule magnet behavior. The experimental derived energy barrier to magnetization reversal for 1 and 2 is 108(1), 47(2) and 33(3) K. Ab initio CASSCF calculations performed on 1 and 2 suggest that the origin of the difference in magnetic properties originates from the variation in the single-ion anisotropy that arises due to minor structural variation. Further, the equation to calculate the effective energy barrier for Dy2 proposed earlier is found to yield an excellent agreement with the experimental results. Solid state fluorescence measurements performed on 1 and 2 demonstrate that both exhibit two ligands centered components of fluorescent emissive, in addition, with different emitting colors and chromaticity coordinates. The discrepancy of fluorescence and single molecule magnet behavior showed by 1 and 2 can be attributed to the steric hindrance effect of Schiff base ligands.

Crystal Structures and Conducting Properties of Mott Insulator (BEDT-BDS)PF6: Selenium Substitution Effect in the Parent (BEDT-BDT)PF6

Abstract A new organic donor, viz. benzo[1,2-g:4,5-g′]bis(seleno[2,3-b][1,4]dithiin) (BEDT-BDS), which is a selenium analog of the parent benzo[1,2-g:4,5-g′]bis(thieno[2,3-b][1,4]dithiin), has been synthesized. The degree of “zigzag-N-shaped” molecular bending of BEDT-BDS, which is caused by the selenium substitution, is greater than that of BEDT-BDT. The N-shaped molecular bending in a radical-cation salt (BEDT-BDS)PF6 changes the S⋯S contact distances between the stacked molecules, and thus, a quasi-one-dimensional electronic structure is formed. According to the compositional formula and temperature dependence of resistivity, the PF6 salt is revealed to be a half-filled Mott insulator.