Coordination Polymers Research Articles

2D Coordination Polymers of Zn(II) with Diethylmalonic Acid Dianions and 4,4´-bipyridine: Synthesis and Structures

2D Coordination Polymers of Zn(II) with Diethylmalonic Acid Dianions and 4,4´-bipyridine: Synthesis and Structures

A new Zn(II)-based 3D MOF with PCU-like topology: Potent photocatalyst for nitrofurazone antibiotic degradation

Metal-organic frameworks (MOFs), a sub-class of coordination polymers, are versatile multidimensional materials that have the potential to serve as photocatalysts for the degradation of antibiotics found in wastewater. Herein, a new three dimensional (3D) Zn(II)-based MOF [Zn(TA)(bpyp)·3H2O] (1) (bypy = 2,5-bis(pyrid-4-yl)pyridine; H2TA = terephthalic acid) has been synthesized and characterized. The MOF 1 shows a 3D PCU-like topology and exhibits semiconducting properties with band gap of 3.34 eV and hence used as a photocatalyst for photodegradation of antibiotics viz. sulfasalazine (SLA), nitrofurazone (NFZ) and furazolidone (FZD) under simulated UV light irradiation. The photocatalytic results suggest that MOF 1 exhibits best photocatalytic activity for the photodegradation of nitrofurazone (NFZ) in 60 min time-span. The effects of initial concentration of NFZ, and photocatalyst dosage have been monitored for the photocatalytic performance of 1. The radical trapping experiments suggest that (holes) h+ and superoxide radical (O2·−) collectively catalyzes the photodecomposition of antibiotics. The possible mechanism for the antibiotic degradation by photocatalyst 1 have been proposed by integrating experiment with density of states (DOS) calculations and Hirshfeld surface analysis.

Two 3D Co(II)-based hydrogen-bonded networks as luminescent sensors for detection of Al3+, Pb2+ and vitamin B2

Rational design of coordination polymers (CPs) as luminescent sensors, has attracted great interest in recent years. In this work, two new Co(II) CPs with formula as {[Co(5-AIP)(1,2-Mbix)]·2H2O}n (1) and {[Co(5-AIP)(1,3-Mbix)]}n (2) have been synthesized and characterized (5-AIP = 5-aminoisophthalic acid, 1,2-Mbix = 1,2-bis(2-methylimidazole-1-methyl)benzene, 1,3-Mbix = 1,3-bis(2-methylimidazole-1-methyl)benzene). CP1 features a 3D hydrogen-bonded network with 5-connected (46·64) bnn topology. CP2 shows a 3D hydrogen-bonded network as a trinodal (3,4,8)-connected topopogy with the symbol of (3·5·7)2(32·6·72·8)(32·54·616·84·102). Two CPs both show excellent luminescent property with good stability in water. Both CPs can effectively detect Al3+, Pb2+ and vitamin B2 (VB2) in water with limits of detection being 84 nM, 0.10 and 0.17 μM for CP1, 25 nM, 0.09 and 0.29 μM for CP2, respectively. Furthermore, two CPs also can detect Al3+ and Pb2+ in real lake water and VB2 in serum. The sensing mechanism was investigated by various detection means. The test films of CP1 and CP2 were also prepared for the visual detection of Al3+, Pb2+ and VB2 in water. This work presents two effective Co(II) CPs as the functional platform for sensing Al3+, Pb2+ and VB2 in aqueous solution.

Lanthanide (Sm, Dy) Complexes with the 9,10-Phenanthrenediimine Redox-Active Ligand: Synthesis and Structures

The complex formation of the redox-active ligand bis(N, N’-2,6-diisopropylphenyl)-9,10-phenanthrenediimine (DippPDI) with alkaline metal (Li, K) and lanthanide (Sm, Dy) cations is studied. The reduction of DippPDI with an alkaline metal excess affords the dianionic form of the ligand (DippPDA2–), which crystallizes with the potassium cation as the coordination polymer [K2(DippPDA)(Thf)3] (Thf is tetrahydrofuran, THF). The reaction of equimolar amounts of the lithium salt with the dianionic form of the ligand and neutral diimine affords the lithium complex with the radical-anion form (DippPSI•–) crystallized as [Li(DippPSI)(Thf)2]. The samarium(III) complex [SmCp*(DippPDA)(Тhf)] (I) is formed by the reduction ofDippPDI with samarocene [Sm (Thf)2] (Cp* is pentamethylcyclopentadienide): both the samarium(II) cation and Cp*– anion are oxidized in the reaction.DippPDI does not react with similar ytterbocene. The dysprosium(III) complexes are synthesized by the ion exchange reactions between DyI3(Thf)3.5 and potassium or lithium salt with theDippPDA2-dianion. Similar complexes [Dy(DippPDA)I(Thf)2] (IIThf) and [Dy(DippPDA)I(Thf)(Et2O)] () are formed in the reactions with the potassium salt depending on the solvent used: a THF-hexane or a diethyl ether-n-hexane mixture, respectively. The coordination of the dysprosium cation by the π system of the conjugated fragment of the NCCN ligand is observed in IIThf, whereas in this coordination is absent. The reaction with Li2(DippPDA) affords the binary complex salt [Li(Тhf)3(Et2O)][DyI2(DippPDA)(Тhf)] (III, crystallization from a THF-Et2O mixture). The crystallization from THF gives the [Li(Тhf)4][DyI2(DippPDA)(Thf)] salt (III') containing the same anion as III. The structures of all new complexes are studied by X-ray diffraction (XRD, CIF files CCDC nos. 2260307–2260313).

Wedging crystals to fabricate crystalline framework nanosheets via mechanochemistry

Mechanochemistry studies the effect of mechanical force on chemical bonds, bringing opportunities for synthesizing alloys, ceramics, organics, polymers, and biomaterials. A vital issue of applying macro-scale mechanical force to manipulate crystal structures is finding ways to precisely adjust the force directions to break micro-scale target chemical bonds. Inspired by a common technique of driving a wedge into the wood to make wood chopping much easier, a wedging strategy of splitting three-dimensional structured crystalline frameworks and then converting them to nanosheets was proposed, where specific molecules were wedged into crystalline frameworks to drive the directional transmission of mechanical force to break chemical bonds. As a result, various crystalline framework nanosheets including metal−organic framework nanosheets, covalent organic framework nanosheets, and coordination polymer nanosheets were fabricated. This wedging crystal strategy exhibits advantages of operability, flexibility and designability, and furthermore, it is expected to expand mechanochemistry applications in material preparation.

Thermally and Photoinduced Spin-Crossover Behavior in Iron(II)-Silver(I) Cyanido-Bridged Coordination Polymers Bearing Acetylpyridine Ligands.

We report two new cyanido-bridged Fe(II)-Ag(I) coordination polymers using different acetylpyridine isomers, {Fe(4acpy)2[Ag(CN)2]2} 1 and {Fe(3acpy)[Ag(CN)2]2} 2 (4acpy = 4-acetylpyridine; 3acpy = 3-acetylpyridine) displaying thermally and photoinduced spin crossover (SCO). In both cases, the acetylpyridine ligand directs the coordination polymer structure and the SCO of the materials. Using 4-acetylpyridine, a two-dimensional (2D) structure is observed in 1 made of layers stacked on each other by silver-ketone interactions leading to a complete SCO and reversible thermally and photoswitching of the magnetic and optical properties. Changing the acetyl group to a 3-position, a completely different structure is obtained for 2. The unexpected coordination of the carbonyl group to the Fe(II) centers induces a three-dimensional (3D) structure, leading to statistical disorder around the Fe(II) with three different coordination spheres, [N6], [N4O2], and [N5O]. This disorder gives rise to an incomplete thermally induced SCO with a poor photoswitchability. These results demonstrate that the choice of the acetyl position on the pyridine dictates the structural characteristics of the compounds with a direct impact on the SCO behavior. Remarkably, this work opens interesting perspectives for the future design of Fe-Ag cyanido coordination polymers with judiciously substituted pyridine ligands to tune the thermally and photoinduced SCO properties.

Construction of a New 2D Coordination Polymer: Degradation Antibiotic Nitrofurantoin and Magnetism

ABSTRACTThe synthesis of a trinuclear Co(II)‐based coordination polymer (CP), [Co3(HL)2(H2O)6·2.2H2O]n (1), was achieved via a solvothermal method involving CoCl2·6H2O and 3‐(2,4‐dicarboxylphenyl)‐2,6‐dicarboxylpyridine (H3L). The photocatalytic efficiency of the complex was evaluated for the degradation of various antibiotics ornidazole (ODZ), nitrofurantoin (NFT), dinitroaniline (DNZ), and tinidazole (TDZ) in wastewater. Notably, NFT exhibited a remarkable 91.5% degradation within 20 min under optimal conditions. The catalytic performance was influenced by the amount of photocatalyst, NFT concentration, and solution pH, with optimal conditions identified at 6‐mg catalyst dose, 30 mg/L NFT concentration, and pH 7. Trapping experiments highlighted the roles of superoxide and hydroxyl radicals as primary active species in the photocatalytic process. Furthermore, the magnetic behavior is also discussed in detail.

A terbium coordination polymer based on mixed rigid and flexible organic ligands as a luminescent sensor for the convenient visual detection of ascorbic acid

Ascorbic acid (AA) is an essential antioxidant in the human body, whose detection is of significance in many fields. In this study, a two-dimensional terbium coordination polymer [Tb (dlba) (phen)]n (Tb-CP) based on a rigid 1,10-phenanthroline (phen) and a flexible 2-(3,5-dicarboxybenzyloxy) benzoic acid unit (H3dlba) was prepared under the hydrothermal conditions and characterized by Powder X-ray diffraction, elemental analysis, thermogravimetric analysis, infrared spectroscopy and single crystal X-ray diffraction. The Tb-CP synthesized via the mixed ligand strategy exhibits excellent water stability and acid-alkali resistance. As a luminescent sensor, the Tb-CP showed bright green luminescence characteristics of Tb3+, which was quenched after the addition of AA, with a quenching efficiency of 95.3 %. Additionally, the sensor shows high sensitivity and a rapid response time of 30 s. The detection limit is as low as 55.4 nM. In the actual sample test, the recovery rate of AA was 95–105 % (RSD< 1 %), indicating that the sensor has the potential for practical application. Furthermore, an integrated system based on Tb-CP and a smartphone can be employed for the visual detection of AA.

Designing a novel 3D structured PVP-assisted Bi-TDC coordination polymers catalyst with tunable bandgap structure to decompose dyes

The exploration of an efficient porous hybrid materials is significant due to their unique properties and good development prospects in catalytic applications. Herein, the PVP-assisted 3D Bi-TDC (2,5-thiophene dicarboxylate acid) is designed by solvothermal reaction to capture solar and mechanical energy for the degradation of rhodamine B (RhB, 5 mg/L) and methylene blue (MB, 5 mg/L). The RhB and MB degradation of the PVP-assisted Bi-TDC reached 99.6 % and 90.2 % under the ultrasonic vibrations and photocatalysis, which displays a higher catalytic activity compared to the bare Bi-TDC. The obviously enhanced catalytic activity can be ascribed to the integrated of ultrasonic vibrations and photocatalysis, the efficient separation of electron-hole pairs and its uniform and regular structure. This present work provided a new strategy to develop a controllable structures and excellent catalytic material for the environmental and energy application.

Fabrication of large surface area/Microrose-shaped Manganese (II) coordination polymer for evaluation of molecular docking, antibacterial and antioxidant Activity

We report the fabrication of Mn (II) chelate or coordination polymer (CPs) via condensation method for antioxidant and antibacterial performances. Tremendous effort has been directed toward design a scaffold multidentate organic ligand framework. One of interesting chelating ligand viz. Sebacoyl bis(2-ethoxybenzamide) (sebebz) was fabricated by condensation of 2-ethoxybenzamide and sebasic acid. Further, the CPs was fabricated by condensation of sebacoyl bis(2-ethoxybenzamide) with metal ions. As-fabricated multidentate ligand was analyzed by several analytical methods for confirm structural backbone in term of chemical bonding, donor atoms and existence of functional groups. Moreover, CPs was analyzed by XRD, FTIR, Raman, EDX, XPS, DRS, BET, SEM, and TEM for authenticate its structure, crystallite size, chemical bonding, elemental existence, porosity, surface area, sizes, and shape. The SEM revealed microrose-shaped structure of CPs with diameter around 20–30 µm, while BET revealed large surface area material (801 m2/g). Due to scaffold structure and effective functional group in CPs, it's molecular docking was evaluated for the purpose of microbial assay. The antimicrobial clinical assay of CPs was assessed against B. subtilis, S. aureus, K. pneumoniae and E. Coli. Also, α, α-diphenyl-β-picrylhydrazyl was used to evaluate antioxidant property of CPs in ethanolic and methanolic solvent.

Practicality and Compatibility of Cd(II) Coordination Polymer as Luminescent Sensor in Selective and Sensitive Detection of 3‐Nitrotyrosine Biomarker

AbstractBased on the mixed ligands of 1,4‐bis(2,4,6‐tricarboxylpyrid‐5‐yl)benzene (H6BTPB) and 1,4‐bis(imidazol‐1‐yl)benzene (bib), a new cadmium(II) coordination polymer with the molecular formula of {[Cd(bib)(μ2‐H2O)(H2O)2](H4BTPB)0.5(bib)0.5}n (CdCP) was constructed under solvothermal condition, and displayed a 3D supramolecular structure expanded by the hydrogen bonds between the 1D [Cd(bib)(μ2‐H2O)(H2O)2]n ladder chain and the guests. Profiting from its superior stability and inherent luminescence, the prepared CdCP dispalyed great potential as a highly sensitive and selective luminescent sensor in trace detection of 3‐NT biomarker in both water and real bodily fluids through the luminescence quenching effects, with the Ksv and LODs being 2.408×105 M−1 and 30.3 nM in water, 2.230×105 M−1 and 44.7 nM in diluted urine, 2.249×105 M−1 and 43.9 nM in diluted serum, respectively. Subsequent mechanism studies indicated the synergistic effect of internal filtering effect, photo‐induced electron transfer, and fluorescence resonance energy transfer determining the luminescence quenching response of CdCP towards 3‐NT biomarker.

Two three-dimensional coordination polymers as fluorescence probes for the detection of nitrobenzene, tetracycline, fluazinam and their application in green pepper

Two coordination polymers (CPs), [Zn5(L)2(phen)5](1) and [Cd2(HL)(2,2-bpy)(H2O)3](2), were synthesized by using 2′,3,3′,5,5′-Diphenyl ether pentacarboxylic acid (H5L), phenanthroline (phen), and 2,2′-bipyridine (2,2′-bpy) under hydrothermal conditions. The L5- ligand adopts the μ6-к2: к2: к1: к1: к1: к1 mode in 1 and the μ5-к2: к2: к2: к2: к1 mode in 2. Sensing experiments show that 1 and 2 are fluorescence probes with high sensitivity and rapid detection of nitro explosives, antibiotics, and pesticides. In order to verify the ability of 2 to detect FLU in actual samples, we performed a spiked recovery experiment in green pepper water. The spiked recoveries were 97.77–101.18 %. Interestingly, because H5L is not completely deprotonated in 2, there is abundant hydrogen bonding, which makes the fluorescence quenching rate higher and the detection limit lower. The possible fluorescence quenching mechanism of 1 and 2 can be explained by their UV–VIS absorption spectra and orbital energy levels.

Multidimensional Hybrid Metal Phosphonate Coordination Networks as Synergistic Anticorrosion Coatings.

In the technologically important field of anticorrosion coatings, it is imperative to form well-defined and characterized films to protect the metal surface from corrosion. Phosphonate-based corrosion mitigation approaches are currently being exploited. Herein, the synergistic action of alkaline-earth metal ions and two carboxy-diphosphonates, PAIBA [N,N-bis(phosphonomethyl)-2-aminoisobutyric acid] and BPMGLY [N,N-bis(phosphonomethyl)glycine], is explored. Also, a family of four novel hybrid metal phosphonate materials is reported, Mg-PAIBA, Ca-PAIBA, Sr-PAIBA, and Sr-Na-PAIBA, whose topological analysis revealed a variety of underlying networks with the 6,10T9, unc, SP 1-periodic net (4,4)(0,2), and unique topologies. The synergistic metal/carboxy-diphosphonate blends were tested for their anticorrosion performance on carbon steel at preselected concentrations (0.1-1.0 mM) and pH values (4.0-6.0). The results showed an enhanced inhibitory performance in the presence of metal cations at higher concentrations. The inhibition of corrosion at pH 5.0 in the presence of BPMGLY, PAIBA, and their combination with Sr2+ was investigated in detail using electrochemical measurements. Enhanced inhibition was achieved with a 1:1 Sr2+/BPMGLY (or PAIBA) binary system. Polarization curves indicated that the system is a "mixed" inhibitor. This study widens the family of carboxyphosphonate coordination polymers, showing their potential as attractive hybrid coatings with anticorrosion performance.

Dicyanamide Anion Protracted Assemblies of Cd(II)-Salen Type Coordination Polymers: Synthetic Perspective, Characterization, Crystallographic Notability, DFT Overview, and Biological Appraisal

Dicyanamide Anion Protracted Assemblies of Cd(II)-Salen Type Coordination Polymers: Synthetic Perspective, Characterization, Crystallographic Notability, DFT Overview, and Biological Appraisal

Effect of structure on sensing performance of nitro explosives with high sensitivity and mechanism of two Tb(III) coordination polymers

The use of a conjugate N-containing ligand resulted in the decreasing of structural dimensions from 2D network of [Tb(2-pyia)(Ac)(H2O)] (CP1) to 1D chain [Tb(2-pyia)(Ac)(IDP)] (CP2) (2-H2pyia = 5-(pyridin-2-ylmethoxy) isophthalic acid and IDP=imidazo[4,5-f]-[1,10] phenanthroline). Both of them exhibit the characteristic luminescence of Tb ions and could have high fluorescence sensing properties for cefixime and fluridine. The different sensing properties for nitro explosives are manifested as CP1 for nitrobenzene and CP2 for 4-nitrophenol due to the difference in structure. Furthermore, CP2 exhibits the ratiometric fluorescence sensing for Fe3+ ion with a low detection limit of 0.405 μM. The fluorescence sensing mechanism of the two Tb complexes for different analytes was investigated using experimental methods and theoretical calculations. CP1 was used for the detection of Flu residues in the actual system and better results were obtained. The work shows the introduction of the chelated ligand might affect the structural and sensing performance changes of coordination polymers.

Syntheses and antimicrobial activities of two coordination polymers assembled with Ag[sbnd]N and Ag[sbnd]O bonds

Two new coordination polymers ({[Ag(p-phda)2](BF4)} n (1) and {[Ag2(1,5-nds)(DMSO)2] DMSO}n (2) (p-phda: p-phenyldiacetonitrile, 1,5-nds: 1,5-naphthalene disulfonic acid, DMSO: dimethyl sulfoxide) were synthesized and characterized by IR, EA,TG and X-ray single crystal diffraction. 1 was revealed as a 2D “fishing net” assembled by AgN bonds with BF4− as equilibrium charge. IR and PXRD analysis showed the BF4− can be irreversibly exchanged by six anions varied in atomic numbers, sizes, configurations and coordination abilities. 2 is constructed by AgO bonds where DMSO function both as guest and bridging ligand. Further diffusion of NO into the solution of 1 and 2 generated two new compounds (1′ and 2′). All four compounds showed excellent broad-spectrum antimicrobial activities against gram-negative bacteria, gram-positive bacteria and yeast. The stronger antibacterial abilities of 1 against S. aureus and P. aeruginosa than those of 2 were evidenced by the smaller minimum inhibitory concentrations of silver ions (AgMICs) and the higher silver ion release rate in aqueous solution. It was concluded that the looser packing of 1 facilitate the silver ions releasing and play a more crucial role than binding mode and ligand-exchangeability. The enhanced P. aeruginosa inhibitions of 1′ and 2′ were elementarily ascribed to NO incorporation, supporting by their increased diameter of inhibition zones and decreased AgMICs.

On-Surface Formation and Chemical Transformations of Indigo Coordination Polymers

Coordination polymers are attractive candidates for miniaturized electronics. With unconventional electronic and magnetic properties posited, they are interesting for multiple applications including magnetic information storage and spintronics. Natural products are appealing to tailor advanced new materials, bearing inherent advantages in biodegradation. Among them, we distinguished indigo, a common natural dye with a distinctive blue color, used as a pigment since antiquity. Motivated by its optical properties and the reported metal complexes [1], we employed it as a molecular building block for the surface formation of coordination polymers with iron.We report on the on-surface formation of extended coordination polymers which controllably feature the cis and the transmonomers of the molecular building block. The reaction products of indigo and Fe were characterized atomically by a combination of state-of-the -art experimental and theoretical techniques. By a combination of X-ray photoelectron spectroscopy and scanning tunneling microscopy (STM), it is found that indigo deprotonates and coordinates with Fe atoms on silver surfaces. We identify unambiguously well-defined coordination polymers composed of (1 dehydroindigo : 1 Fe) repeat units with STM, bond-resolving atomic force microscopy and density functional theory (DFT) simulations. On both Ag(100) and on Ag(111), the trans configuration of dehydroindigo results in N,O-chelation in the polymer chains. On the more inert Ag(111) surface, the molecules undergo thermally induced isomerization from the trans to the cisconfiguration and afford N,N- plus O,O-chelation (see figure). This is enabled by the dehydrogenation and is preferential solely in the environment of the coordination chain on Ag(111). DFT calculations also confirm that the coordination polymers of the cis-isomers on Ag(111) and of the trans-isomers on Ag(100) are energetically favored.Our results demonstrate post-synthetic linker isomerization in interfacial metal-organic nanosystems. Both types of coordination polymers are predicted to be spin-crossover systems and the isomerization is anticipated to have a significant impact on their magnetic properties.

Pristine Metal-Organic Frameworks for Efficient Oxygen Evolution Electrocatalysis

Green energy technologies propose the use of hydrogen as fuel instead of fossil fuels that have drawbacks of limited supplies and greenhouse gas emission during their combustion. Though hydrogen is the most abundant element on the Earth, hydrogen gas is commonly not found in pure form, but bound in compounds such as water or hydrocarbons. Thus, hydrogen gas is a synthetic fuel that needs to be produced. For the energy to be completely green, hydrogen should be produced using renewable energy. Currently, most of the hydrogen is produced using fossil fuels and only ca. 5% is produced using electrolytic water splitting. It is the high cost of the water-splitting process that limits its use on the wider scale. To reduce the associated high energy input to break a water molecule, resulting in high cost of hydrogen produced by water splitting, expensive electrocatalysts are typically used.The aim of this work is to design novel and low cost metal-organic frameworks (MOF) or coordination polymers (CP) utilizing different ligands (for instance, amide functionalized ligands) towards their application in energy conversion reactions such as oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). MOFs are rarely used in their pristine form; literature reports typically focus on MOF-derived carbon materials. Moreover, herein special attention is given to OER as the efficiency-limiting reaction within the water electrolysis process.The first part of the work focuses on the synthesis and characterization of ligands and MOFs/CPs based on transition metals, nickel and cobalt. The morphology and structure of these composites is examined using electron microscopy and X-ray diffraction analysis. The second part of the work focuses on the pristine materials’ electrocatalytic activity involving standard electrochemical techniques, i.e., voltammetry, impedance spectroscopy, and chronoamperometry to identify the material with the optimum performance and stability. Main reactions parameters including onset potential, overpotential at defined current density as well as current density at defined potential and Tafel slope, are determined.This work presents step towards green hydrogen production within search for solutions for the current energy crisis. Acknowledgments This work was supported by the Science Fund of the Republic of Serbia, grant number 7750219, Advanced Conducting Polymer-Based Materials for Electrochemical Energy Conversion and Storage, Sensors and Environmental Protection-AdConPolyMat (IDEAS programme).

Curcuminoids and Related for on-Surface Synthesis and Electronics

Increasingly, technological progress in miniaturisation for electronic purposes requires synergy between different disciplines, with the connection between chemists, physicists, biologists, theorists, and engineers, for example, being crucial. This is clearly demonstrated in the multidisciplinary approach of OSS, where experimental physics coexists with a solid application of chemical reactivity, supported by theoretical studies, which together have demonstrated the ability to develop 0D-3D molecular-based systems with promising prospects. From a chemical point of view, this fosters the exploration of new families of molecules that may provide different properties, inspire new synthetic routes, and broaden knowledge (and thus new applications).In relation to this, in FunNanoSurf (Functional Nanomaterials and Surfaces, https://funnanosurf.icmab.es/) we focus on the synthesis of curcuminoid species (CCMoids)[1] and derivatives and explore their different uses, apart from their well-known biological applications. CCMoids are linear molecules containing a conjugated backbone, with a central keto-enol moiety and aromatic groups at both ends of the molecular unit, conferring the final system with an overall symmetry. Thanks to their high chemical versatility, straightforward synthesis, and purification, in recent years, we have demonstrated that these systems are excellent molecular platforms and can be used in areas related to molecular electronics (as nanowires),[2] coordination polymers (as excellent heterodiotopic linkers)[3] and now also in OSS exploration.This work aims to make known precisely these points about CCMoid systems and derivatives: their growing potential for use in the same way as other molecular families. Examples of their synthetic plurality, applications, and their possible expansion on surfaces, mainly for electronic purposes, will be presented.[1] Riba-Lopez, D,. Zaffino, R., Herrera, D., Matheu, R., Silvestri, F., Ferreira da Silva, J., Sanudo, E. C., Mas-Torrent, M., Barrena, E., Pfattner, R., Ruiz, E., Gonzalez-Campo, A., Aliaga-Alcalde, N. iScience, 25(12),105686 (2022).[2] (a) Olavarria-Contreras, I. J., Etcheverry-Berrios, A., Qian, W., Gutierrez-Ceron, C., Campos-Olguin, A., Sanudo, E. C., Dulić, D., Ruiz, E., Aliaga-Alcalde, N., Soler, M., van der Zant, H. S. J.Chem. Sci., 9, 34, 6988-6996 (2018). (b) Etcheverry-Berríos, A., Díaz-Torres, R., Jullian, D., Ponce, I., Vásquez, S. O., Olavarria, I., Perrin, M. L., Frisenda, R., van der Zant, H. S. J., Dulić, D., Aliaga-Alcalde, N., Soler, M. Chem. Eur. J., 22, 12808-12818 (2016). (c) Burzurí, E., Island, J., Díaz-Torres, R., Fursina, A., González-Campo, A., Roubeau, O., Teat, S. J., Aliaga-Alcalde, N., Ruiz, E., van der Zant, H. S. J. ACS Nano, 10 (2), 2521-2527 (2016).[3] (a) Rodríguez-Cid, L., Qian, W., Iribarra-Araya, J., Etcheverry-Berríos, Á., Martínez-Olmos, E., Choquesillo-Lazarte, D., Sañudo, E. C., Roubeau, O., López-Periago, A. M., González-Campo, A., Planas, J. G., Soler, M., Domingo, C., Aliaga-Alcalde,N. Dalton Trans. 50, 7056-7054 (2021). (b) L. Rodríguez-Cid, E. C. Sañudo, A. M. López-Periago, A. González-Campo, N. Aliaga-Alcalde, C. Domingo, Crystal Growth and Design, 20, 6555-6564 (2020).

Two new coordination polymers: crystal structures and photodegradation of the organic dye RhB

The solvothermal assemblies of a silicon-centered tetrahedral ligand as a principal building block, an N-donor ancillary ligand, and the corresponding metal salts yield two new transition metal coordination polymers (CPs), [Zn3(OH)(H2O)3L(ttb)]·3H2O (1) and [Co3(OH)(H2O)2L(ttb)(DMF)2]·2H2O (2) [H4L = 4,4',4'',4'''-silanetetrayltetrabenzoic acid, ttp = 1-(tetrazo-5-yl)-4-(triazo-1-yl)benzene, DMF = N,N-dimethylformamide]. Photocatalytic test results indicate that 1 and 2 can serve as excellent photocatalysts for Rhodamine B (RhB) degradation.