Maximum Of Absorption Spectrum Research Articles

Production and Partial Characterization of Yellow Pigment Produced by Kocuria flava Isolate and Testing its Antioxidant and Antimicrobial activity.

Recently, Natural pigments produced great interest within the market and made need to find eco-friendlier and less hazardous pigments than synthetic colorants, particularly microbial pigments. This work was undertaken with an aim of isolating pigment producing bacteria from air, then production and extraction pigment from isolated bacteria with antioxidant and antimicrobial properties against pathogenic microorganisms. Bacterium was identified by morphological characteristics and 16S rRNA sequencing as Kocuria flava SIF3, submitted to GenBank (accession number MN162713). Pigment production was carried out using nutrient broth medium (NB). Yellow pigment extracted by using methanol as solvent, showed maximum absorption spectrum (λmax) at 437 nm by UV-VIS spectroscopy and the degree of cell pigmentation was 0.472. Partial characterization of the extracted yellow pigment using UV- VIS spectroscopy and Fourier- Transform Infrared Spectroscopy analysis (FTIR) revealed it to be a carotenoid which has numerous applications. This novel extracted yellow pigment was screened for antimicrobial activity against pathogenic and antioxidant activity. This particular pigment showed inhibitory effect against all tested microbes so it could be chosen as a broad spectrum antimicrobial agent. The maximum zone of inhibition was (20 mm) against Penicillium sp. then Pseudomonas aeruginosa (12mm). The yellow pigment was discovered to have DPPH radical- scavenging activity with an IC50 value of 1.25mg / ml in vitro antioxidant assay. Present findings highlight the significance of yellow pigment extracted from Kocuria flava SIF3. Further purification of pigment will be useful in discovering a promising drug.

A Green Approach for the Synthesis of Silver Nanoparticle-Embedded Chitosan Bionanocomposite as a Potential Device for the Sustained Release of the Itraconazole Drug and Its Antibacterial Characteristics.

The present research work intended to demonstrate the green synthesis of silver nanoparticles (AgNPs) using the plant extract Saccharum officinarum, and then the development of chitosan–silver (CH-Ag) bionanocomposite. The synthesized AgNPs were characterized using UV spectroscopy, Fourier transform infrared (FTIR), and transmission electron microscopy (TEM). The maximum absorption spectrum peak was observed at 420 nm, revealing the formation of AgNPs by the stem extract of S. officinarum. The AgNPs sizes were in the range of 10–50 nm. Itraconazole is an antifungal that is used as a novel drug to study its release through synthesized bionanocomposite. Different kinetic models, such as zero order, first order, Korsmeyer–Peppas, Hixson–Crowell and Higuchi, were used to study the drug release profile from the synthesized CH-Ag bionanocomposite. The first-order kinetic model showed the best fit for the drug release with the maximum regression coefficient value. The antibacterial activity of the synthesized CH-Ag bionanocomposite was examined against Bacillus cereus, Staphylococcus, and Escherichia coli, and it was shown to be efficient against these strains.

N,N-di(4-methoxyphenyl)hydrazones of carbazole and phenothiazine carbaldehydes containing 4-methoxyphenyl groups as hole transporting materials

In a quest of exploitation of low-cost chemistry for the preparation of hole-transporting materials, we investigated the synthesis of N,N-di(4-methoxyphenyl)hydrazones and the corresponding dihydrazones of carbazole and phenothiazine carbaldehydes. The electron photoemission spectrometry measurements of the layers of the synthesized compounds revealed low ionization potentials in the range of 5.27–5.41 eV. Charge-transporting properties of the compounds were characterized by xerographic time of flight method. The measurements revealed hole mobilities reaching 10−3 cm2/Vs at high electric fields. DFT calculations of the geometry, electronic structure, absorption and photoluminescence spectra of the compounds were carried out to explain and supplement experimental data. The results of calculations show that the first maxima in absorption spectra of the compounds can be attributed to the π-π * local excitation of conjugated system including mainly lone electron pairs of the nitrogen atoms of hydrazone and carbazole or phenothiazine moieties. It is not accompanied by any significant charge transfer. The experimentally observed dramatic effect on the emissive properties of the compounds by attachment of the hydrazone moieties is explained by rotation of para-methoxyphenyl ring into the plane of carbazole moiety upon excitation, which leads to significantly larger charge transfer in the case of S1→S0 emission, compared to S0→S1 absorption.

Near-Infrared Light Irradiation of Porphyrin-Modified Gold Nanoparticles Promotes Cancer-Cell-Specific Cytotoxicity.

The use of nanoparticles has been investigated as a new cancer treatment. These can induce specific cytotoxicity in cancer cells. In particular, Au nanoparticles (AuNPs) have unique characteristics. The maximum absorption spectrum of AuNPs can be adjusted to modify their size or shape to absorb near-infrared light that can penetrate into tissue without photodamage. Thus, the combination of AuNPs and near-infrared light can be used to treat cancer in deep-seated organs. To obtain effective cancer-specific accumulation of AuNPs, we focused on porphyrin and synthesized a porphyrin-attached Au compound: Au-HpD. In this study, we investigated whether Au-HpD possesses cancer-specific accumulation and cytotoxicity. Intracellular Au-HpD accumulation was higher in cancer cells than in normal cells. In order to analyze the cytotoxicity induced by Au-HpD, cancer cells and normal cells were co-cultured in the presence of Au-HpD; then, they were subjected to 870 nm laser irradiation. We observed that, after laser irradiation, cancer cells showed significant morphological changes, such as chromatin condensation and nuclear fragmentation indicative of cell apoptosis. This strong effect was not observed when normal cells were irradiated. Moreover, cancer cells underwent cell apoptosis with combination therapy.

Стэкинг-агрегация и фотодимеризация тиминовых хромофоров в водных растворах poly-T

The heterogeneity of aqueous solutions of polythimidylic acid (poly-T) at room temperature has been established by the methods of luminescence and absorption spectroscopy. Two fractions of thymine chromophores have been identified: 1) a photoactive fraction consisting of two types of stacking aggregates with an optimal structure for photodimerization, the first type corresponds to absorption bands at 250 and 280 nm (exciton splitting 4300 cm-1), the second - 260 and 290 nm (exciton splitting 4000 cm-1); 2) photochemically intact with the maximum of absorption spectrum at 270 nm, without exciton splitting, probably consisting of relatively isolated chromophores.

Efficacy of silver and gold nanoparticles obtained from vermiwash: In vitro study on antimicrobial and antidiabetic activities

Emerging nanobiotechnology has provided innovative techniques to synthesize nanoparticles through biological methods to explore the potentialities of biological sources like phytoextracts, microbes, animal secretions and excretion. This research studies the potential of vermiwash to synthesize the silver and gold nanoparticles and evaluate its in vitro effect of antimicrobial and antidiabetic activities. The characterization of the nanoparticles was analyzed through various techniques. Ultraviolet (UV)-Visible spectroscopy showed the maximum absorption spectrum at 413 nm for silver and 541 nm for gold nanoparticles. Fourier transform infrared spectroscopy (FTIR) revealed the reducing agent involved in nanoparticles synthesis. Scanning electron microscope (SEM) images revealed the size of the silver and gold nanoparticles as 24 nm and 50 nm, respectively. Energy dispersive X-ray (EDAX) analysis revealed the elemental composition of the synthesized nanoparticles. X-ray diffraction (XRD) analysis confirmed the crystalline nature of the nanoparticles that displayed the preferential orientation of the crystals toward the (111) plane. Antimicrobial activity was assessed using the resazurin assay method. A minimum inhibitory concentration (MIC) of less than 7.8 µg was observed in Staphylococcus aureus and Klebsiella pneumoniae. In the antifungal activity, MIC at 250 µg was noted in Mucor sp. and Candida albicans. Antidiabetic activity was assessed by α-amylase and α-glucosidase inhibitory assay. IC50 of α-amylase and α-glucosidase activity of the silver nanoparticles was noted as 218 and 221 µg/mL, respectively. IC 50 value for the enzymatic assay dose-dependently confirmed the effect. Conclusively biosynthesized nanoparticles from vermiwash showed potential efficiency of antibacterial, antifungal and antidiabetic activities.

Multifarious Biological Applications and Toxic Hg2+ Sensing Potentiality of Biogenic Silver Nanoparticles Based on Securidaca inappendiculata Hassk Stem Extract.

IntroductionThe use of environmentally benign resources for nanoparticles synthesis is consistently pushed to the front burner in a bid to ensure and enhance environmental protection and beneficiation. In this light, application of different plant parts for the reduction and stabilization of nanoparticles is gaining popularity.Materials and MethodsIn this contribution, we have exploited Securidaca inappendiculata stem extract (SISE), as the reducing and stabilizing agent for room temperature synthesis of highly stable and dispersed AgNPs. The major bioactive compounds in SISE were profiled using an ultra-high-performance liquid chromatography-quadrupole-time-of-flight mass spectrometry (UHPLC-MS-QTOF-MS).Results and DiscussionSISE could reduce silver salts to its nanoparticles almost instantaneously with a maximum absorption spectrum at 423 nm, under the optimal conditions. The fabricated SISE AgNPs was extensively characterized using FTIR, TEM, SEM, XRD, EDS, Zeta analysis/DLS and TGA/DTG analysis. SISE AgNPs with average particles size between 10–15 nm and a zeta potential value of −19.5 ± 1.8 mV was obtained. It was investigated for in-vitro biological applications by carrying out, antimicrobial, antioxidant, hemolytic, cytotoxicity and antidiabetic assays. It was found that SISE AgNPs exhibited potent antimicrobial capacity against some food borne microbes, good antioxidant property, while also demonstrating high biocompatibility. Moreover, with a view to extending further the applications SISE AgNPs, it was tested as a colorimetric nanoprobe for Hg2+ detection in aqueous environment, where good linearity between 0.10 and 10.0 μM, with a detection limit of 26.5 nM, were obtained. The practicality of the probe was investigated by carrying out Hg2+ detection in water sample, with good accuracy and precision.DiscussionOverall, this work introduced a new stabilizer for biocompatible AgNPs with far-reaching applications.

Preparation of Sensitivity Test Antibiotic Discs Using Some Nanomaterials to Detect Resistance of Pseudomonas Aergenosa to Some Antibiotics

This study was conducted to synthesize bentonite nanoparticles and load them on different antibiotics to increase the effectiveness of the antibiotics or treat the resistance of Pseudomonas aeruginosa to some types of antibiotics in the laboratory. The biosynthesized bentonite nanoparticles were characterized by spectrophotometry and scanning electron microscopy. Their antibacterial activity against Pseudomonas aeruginosa was determined by the (muller-hinton) method of diffusion in plates compared with antibiotics using different concentrations of each ranging from 12.5-200 µg/ml. The results of this study showed that it is possible to synthesize bentonite nanoparticles in an easy and environmentally friendly manner, and the maximum absorption spectra of these nanoparticles were at 420 and 430 nm using a spectrophotometer. The scanning electron microscope analysis also showed that the average diameter of these particles was 26 nanometers, in addition to their high activity against bacteria.

Aggregate Formation of Boron-Containing Molecules in Thermal Vacuum Deposited Films.

The spectral properties of new boron-containing dyes were studied. One-component (pure dyes) and composite “Alq3+dye” thin films were fabricated using the thermal vacuum deposition method. The positions of the transmission spectra maxima in a one-component film are different for different film thicknesses. The best correlation of the maxima positions of the dye transmission spectra in solid and liquid solutions was observed for thicknesses of films close to a few (up to 10) monolayers. On the other hand, the absorption spectra maxima positions of one-component dye films (upper 10 nm) and composite films with high concentration, did not match the corresponding positions of absorption spectra maxima recorded in solutions. Comparison of the absorption spectra in one-component dye films and in solutions indicates the presence of both monomers and their aggregates in one-component films (contrary to solutions where such processes of aggregation do not take place, even at very high concentrations). Simultaneously with aggregation manifestation in the absorption spectra, the intensity of fluorescence of one-component dye films dramatically decreases. A quantum chemical simulation of the possible relative arrangement of two dye molecules indicates that the most possible of the simplest types of aggregates are physical dimers. Films of practical importance (due to efficient energy transfer from host to guest molecules when all singlet excitons are captured) possess a high quantum yield of fluorescence when reaching an impurity concentration of a few percent (aggregation does not take place yet).

Structure and electronic properties of mono and di-methyl substituted poly(p-phenylenebenzobisthiazole) oligomers: A computational study

The structural and electronic properties of mono and di-methyl substituted poly( p -phenylene benzobisthiazole) oligomers have been investigated theoretically employing quantum chemical calculations based on density functional theory (DFT) using the B3LYP functional. The neutral states geometries of these oligomers have been used to calculate the HOMO-LUMO gaps (D H-L ), ionization potentials (IP) and electron affinities (EA). The lowest excitation energies ( E g ) and the maximum absorption spectra have been studied using the TDDFT/B3LYP/6-31G(D) method. The cationic and anionic states of these oligomers have been optimized using the same methodology. The optimized lowest singlet excited-state geometries of oligomers have been used to calculate the emission spectra by using TDDFT method. The D H-L s, IPs, EAs, E g s, and absorption/emission spectra of the respective polymer have been obtained by extrapolating those of the oligomers to the inverse chain length equal to zero. From the reorganization energies, it can be seen that the electron transport energy values are smaller than the hole transport suggesting that these could be used as electron transport materials in light emitting diodes devices. Thus, these studies on the oligomers will help in rationalizing the properties of known polymers and to predict those of yet unknown ones for their utilization in electronic devices.

Multi-Faceted Role of Silver and Gold Nanoparticles Synthesized from Biowaste and its in vitroAntibacterial, Antifungal and Antidiabetic Activities

Increasing global fish production, increasing the amount of waste generated, unsafe disposal of waste tissues like head, bones, skin, scales, fins etc., into land and open water reservoirs leads to environmental pollution. The role of nanobiotechnology in biowaste management is an innovative strategy to handle environmental issues. This study synthesized silver and gold nanoparticles from prawn heads using one millimolar AgNO3 and HAuCl4. Biosynthesized nanoparticles were characterized by UV -Visible spectroscopy, XRD, FTIR, SEM and EDAX. The maximum absorption spectrum was monitored at 437 nm for silver and 552 for gold nanoparticles. Antimicrobial activity was assessed using the resazurin assay method. MIC values obtained for the tested organisms revealed antimicrobial activities. P aeruginosa, K. pneumoniae, showed MIC at 15.6 µg for silver nanoparticles, and A. niger, A.flavus and C.albicans showed MIC at 125 µg for gold nanoparticles synthesized from the prawn head extract. IC 50 values of α- amylase activity were found to be 296 and 356 µg/ml for the silver and gold nanoparticles, respectively. IC50 values are about 705 and 2475 µg/ml for the silver and gold nanoparticles, respectively, in α-glucosidase activity. Conclusively silver and gold nanoparticles synthesized from prawn head extract (PHE) showed antibacterial, antifungal, and antidiabetic activities.

Ultra-narrowband absorption filter based on a multilayer waveguide structure.

We propose a six-layer waveguide structure embedded in a single-layer grating based on guided-mode resonance (GMR), which can realize ultra-narrowband filtering with a tunable resonance wavelength. The filtering characteristics were analyzed and calculated by rigorous coupled-wave analysis (RCWA) and COMSOL Multiphysics. The narrowband resonance wavelength and absorption are tuned by changing the geometry and physical parameters of the structure such as the grating period and width, layer thickness, and materials. We designed and calculated the full width at half maximum (FWHM) and resonance absorption spectra in detail under different polarization states of electromagnetic waves. We obtained an absorption FWHM of 8.51e-5 nm for the transverse electric (TE) mode and 0.023 nm for the transverse magnetic (TM) mode, with the absorption coefficients having a value over 99.2%. The GMR filtering structure shows a good sensitivity and figure of merit (FOM) for refractive index sensing. For instance, a very high FOM of 17782.6/RIU for TM incidence is observed. These structures can have possible applications in optical information devices and sensors.

Expression dynamics of visual opsin genes in marbled sole Pseudopleuronectes yokohamae during metamorphosis from the larval to the juvenile stage.

We clarified the properties of visual opsin genes in the marbled sole (Pseudopleuronectes yokohamae) by cDNA sequencing, quantification of the opsin gene expression from the larval to the juvenile stage, and measurement of the maximum absorption spectra (λmax) using photopigment reconstitution. In the marbled sole eye, at least eight visual opsin genes, lws, rh2-a, rh2-b, rh2-c, sws2a, sws2b, sws1, and rh1, were expressed. Quantitative RT-PCR analysis revealed that the expression of opsin genes increased (lws, rh2-c, sws2a, and rh1) or decreased (rh2-a, rh2-b, sws2b, and sws1) from the larval to the juvenile stage. Notably, rh2-a expression was observed only in pre- to mid-metamorphic stage larvae and disappeared after metamorphosis. Thus, pre-metamorphism-specific expression of rh2-a in the marbled sole suggests that its function is restricted to the developmental stage. The reconstituted RH2-A opsin λmax was 470nm, which is typical of acanthopterygian species. These results strongly suggest that mid-wavelength-sensitive rh2-a expression was diminished drastically in the marbled sole, probably resulting in a shift of spectral sensitivity during its metamorphosis from the larval to the juvenile stage.

Модель конструкции микроводорослевой фотометрической ячейки

The work assesses the efficiency of red light-emitting diodes widely used in phyto-irradiators. The article focuses on the emitting monochrome LED with an extended radiation range in a photometric cell used for determining the concentration of pigments in microalgae cultures, Spectrophotometric methods are known as the most accurate and relevant methods for assessing the concentration of pigments, having significant advantages for monitoring and controlling the process over chemical ones in terms of selectivity, speed, accuracy, sensitivity, substance consumption, as well as the possibility of continuous analysis in a flow. The study of the emission spectra of red LEDs, their comparison with the absorption spectra of microalgae cultures, as well as the selection of the most accessible emitting element for the photometric cell is carried out. The analysis of the absorption spectra of the culture and extracts of Dunaliella salina using the method of dividing the long-wavelength region of the spectrum (from 600 to 700 nm) into separate Gaussian curves is presented. Based on the results obtained, the choice of an LED is made, which has an extended radiation range and allows providing a high sensitivity of the device, with low price making it easy to manufacture a photometric cell. Comparison between the emission spectrum of the LED and the absorption spectrum of the microalgae culture allows us to conclude that the emission spectrum of the LED emitter is in good agreement with the maximum absorption spectrum of the chlorophyll b pigment in the 620–700 nm region, which means that such an emitter is capable of providing a higher energy efficiency. The spectrum of the transmitted light entering the photodetector is also built. It is concluded that the proposed LED, when used in a photometric cell, can effectively work with pigments in the red region of the spectrum. The obtained device spectra allow determining such culture characteristics as biomass and the ratio of chlorophyll a and chlorophyll b. The transmitted light spectrum allows determining not only the average value of the energy received by the photocell but also the amount of pigments.

Избирательная сольватация красителя 4-DASPI в бинарном растворителе вода-этиленгликоль

Solvatochromic shifts of the absorption spectra maxima of the dye 4-DASPI (4- [4- (dimethylamino) styryl] -1-methylpyridinium iodide) in a binary solvent water-ethyleneglycol in the concentration range 0-100% were experimentally investigated. The dependence of the solvatochromic shift on the macroscopic dielectric constant of the solution and the concentration of ethyleneglycol was determined. The Onsager-Liptay model was used for the theoretical interpretation of the experimental data. It made it possible to estimate the effective dielectric constant in the microscopic area that contacts with dye chromophore taking into account the measured solvatochromic shifts. It was found that the value of the dielectric constant in the solvation shell of this dye differs significantly from the macroscopic value. The solvation shell is significantly enriched by ethyleneglycol (preferential solvation) over the components’ concentration range. The enrichment reaches its maximum approximately in the middle of this range. The composition of the dye solvation shell at different concentration is discussed.

Development and Validation of Analytical Methods for the Identification in Canprophem - АK® Suppositories with the New Original Polyene Antibiotic

Introduction: The paper presents analytical methods for the identification of Roseofungin active pharmaceutical ingredient (API) using thin layer chromatography (TLC) and spectrophotometry in the ultraviolet region, for the drug CANPROFEM - AK® containing the original polyene antibiotic Roseofungin in the form of suppositories. The study established optimal conditions for the experiment, including sample preparation; the Specificity validation characteristic was examined for each method. Results: Method 1 employed the TLC plate pre-coated with a layer of F254 silica gel using n-butanol saturated with purified water as a mobile phase; the substance was identified in UV light at a wavelength of 365 nm. The method makes it possible to uniquely and specifically identify roseofungin in the presence of placebo components. In method 2, the maximum of the ultraviolet absorption spectrum of the solution being tested coincides with the maximum of theultraviolet absorption spectrum of the reference sample solution (364±2 nm). Conclusion: The methods are suitable for solving the intended objectives and are included in the draft analytical normative document on the finished product quality control by the Identification characteristic.

Polycyclic naphthalenediimide-based nanoparticles for NIR-II fluorescence imaging guided phototherapy

Optical imaging and phototherapy in the second near-infrared window (NIR-II, 900–1700 nm) can reduce tissue auto-fluorescence and photon scattering, which facilitates higher spatial resolution and deeper tissue penetration depth for solid tumor theranostics. Herein, a polycyclic naphthalenediimide (NDI) based chromophore 13-amino-4,5-dibromo-2,7- di(dodecan-6-yl)-1H-isoquinolino[4,5,6-fgh]naphtho[1,8-bc][1,9]phenanthroline-1,3,6,8(2H,7H,9H)-tetraone (NDI-NA) was designed and synthesized. With large polycyclic π-systems, NDI-NA molecule possesses broad near-infrared (NIR) absorption (maximum at 777 nm) and emission (maximum at 921 nm). By nanoprecipitation, NDI-NA nanoparticles (NPs) were formed in aqueous solution with J-aggregative state, which showed huge red-shift in both absorption spectrum (maximum at 904 nm) and emission spectrum (maximum at 1,020 nm), endowing NDI-NA NPs efficient NIR-II fluorescence imaging capability. Besides, the NPs present effective tumor-targeting capability in vivo based on the enhanced permeation and retention (EPR) effect. More importantly, NDI-NA NPs simultaneously have high photothermal conversion efficiency (30.8%) and efficient reactive oxygen species generation ability, making them remarkably phototoxic to cancer cells. The polycyclic chromophore based multifunctional NDI-NA NPs as NIR-II phototheranostic agents possess bright future for clinical NIR-II imaging-guided cancer phototherapy.

Temperature Dependency of Proton Pumping Activity for Marine Microbial Rhodopsin from Antartic Ocean

Proteorhodopsin (PR) is discovered from marine bacteria and it has proton pumping activity from inside to outside of the cell using light energy. In general, PR classified into two groups by the maximum absorption spectra. In this study, we isolated the two of a full sequence of opsin homologues by PCR from the seawater sample near King George Island, Antarctica. One was the same sequence as the first reported GPR (Green-light absorbing PR) from Monterey Bay. Another named HSG119 was a newly discovered sequence which shows high sequence similarity with BPR (Blue-light absorbing PR). HSG119 has an absorption maximum at 493 nm with broader spectrum at pH7.0 and it can pump protons out of the cell membrane. Interestingly, it showed a similar temperature dependence to GPR(Y200N) that isolated near the North pole.

Synthesis and Characterization of Nano-Acetamiprid—New Plant Safeguard Nanomaterial

In present days many types of materials are used to reduce the environmental pollution in the world which includes nanomaterials. Nanopesticides increase the efficacy, durability and reduction in the amount of active constituent. The potential applications of nanotechnology in pesticides are quick decomposition in soil or plant, targeted delivery, apparent solubility and controlled release. In this communication the author reported a neonicatonoid insecticide called as Nano-acetamiprid and it is widely used to control fungal infections in different crops like cotton, leafy vegetables, citrus fruits, pome etc. The author reported a facile method i.e. a new Nano-acetamiprid for plant disease control and its subsequent characterization of encapsulated complex using polycaprolactone as an encapsulated agent. Nano-acetamiprid encapsulated particles were characterized by dynamic light scattering (DLS), ultraviolet spectroscopy and scanning electron microscopy (SEM). To ascertain the formation and the stability of nanoencapsulated acetamiprid pesticide, the maximum absorption spectra formulated at 421 nm and unformulated pesticide at 520 nm were observed. The size distribution was noted at 40 - 50 nm. The bioactivity study was conducted against various Aspergillus niger. The performance of nano particles was many fold times effective when compared to the original parental particles. The bio-assay of Nano-acetamiprid shows better results when compared to the normal commercial acetamiprid.

Synthesis, Characterization Of Organic Nanoparticles of Oxadiazole Derivative

The synthesis oxadiazole derivative 2,5-disubstituted-1,3,4oxadiazole (3a,3b,3c) was prepared from reaction of N-(4-amino benzene sulphonyl)Morpholipebut-2-enehydrazide with (4-hydroxybenzaldehyde,4-methoxy benzaldehyde,4-ethoxybenzaldehyde) in the presence of lone as catalyst. The structure of (3a,3b,3c) was characterized by using FT-IR, H-NMR and spectroscopy. Nanoparticles of the prepared compounds have been fabricated in aqueous media using re-precipitation method.Characterization of the nano particles (ONPs) have been performed by using UV-VIS spectrophotometer and scanning electron micro scope ( SEM). The size of the nanoparticales were around 150-200 nm as indicated by (SEM). The maximum of absorption spectrum of the dispersed nanoparticales red shifted by 5nm from the molecules of product in the solution.