Asian Journal of Chemistry最新文献_第6页

Theoretical Validation of Reversible Acidochromism of a Cinnamaldehyde based Scaffold with Experimental Investigations 肉桂醛基支架可逆酸变色的理论验证与实验研究

Asian Journal of Chemistry Pub Date : 2024-03-30 DOI: 10.14233/ajchem.2024.30911

Rupam Patgiri, Bapan Saha, Nilpawan Sarma, Ziaur Rahman, R. A. Bepari

引用次数: 0

Effect of Isopropanol Mixed Solvent on Interaction of Cetyltrimethylammonium Bromide with Bromocresol Green: A Conductometric Study 异丙醇混合溶剂对十六烷基三甲基溴化铵与溴甲酚绿相互作用的影响：电导率研究

Asian Journal of Chemistry Pub Date : 2024-03-30 DOI: 10.14233/ajchem.2024.31216

S. Samanta

{"title":"Effect of Isopropanol Mixed Solvent on Interaction of Cetyltrimethylammonium Bromide with Bromocresol Green: A Conductometric Study","authors":"S. Samanta","doi":"10.14233/ajchem.2024.31216","DOIUrl":"https://doi.org/10.14233/ajchem.2024.31216","url":null,"abstract":"In present work, the interaction of an anionic dye, bromocresol green (BCG) with a cationic surfactant, cetyltrimethylammonium bromide (CTAB), was studied using conductometric method. The effect of alteration of solvent media from water to cosolvent isopropanol and the effect of elevation in experimental temperature on the association behaviour of BCG-CTAB system were studied. The observed CMC and ΔG°m values indicate disfavored micellization of CTAB system in isopropanol. Whereas micellization of CTAB is favoured in the presence of BCG as additive. For BCG-CTAB system micellization becomes more feasible in presence of isopropanol. The observed value of ΔH°m and ΔS°m predicts micellization of CTAB is endothermic and entropy driven in aqueous solution, whereas, in the presence of BCG it becomes exothermic and enthalpy driven. The micellization process of BCG-CTAB system is exothermic and enthalpy driven in isopropanol. The calculated thermodynamic parameters of transfer for the BCG-CTAB system from water to water-isopropanol media at various temperatures (ΔG°m,tr, ΔH°m,tr, ΔS°m,tr) also supports the entropy-enthalpy mutual act in the micellization process of BCG-CTAB system. Present study also reveals that a compensation phenomenon is operative between the enthalpy and entropy of micellization in case of association process involving the CTAB and the BCG-CTAB systems. The hydrophobic stabilization results to increase in spontaneity of micellization of BCG-CTAB system in water while there is a decrease in hydrophobic stabilization in the presence of isopropanol and a decrease in spontaneity of micellization.","PeriodicalId":8494,"journal":{"name":"Asian Journal of Chemistry","volume":"42 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140363691","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis of Quinoline-based New Organic Chemosensors and its Application in Fluorophoric Detection of Metal-ions in Environmental Samples and Confirmation of Results using Molecular Modelling: A Complete Study 基于喹啉的新型有机化学传感器的合成及其在环境样品中金属离子荧光检测中的应用，以及利用分子模型对结果进行确认：完整研究

Asian Journal of Chemistry Pub Date : 2024-03-30 DOI: 10.14233/ajchem.2024.31322

M. Thakare, A. Yadav, D. Domyati, K.K. Joshi, M. Patel, V. Talismanov, G.S. Sundari, V. Prakash, S. Sehlangia

引用次数: 0

A Comparative Kinetic Study of Uncatalyzed and Ce(IV) Catalyzed Cetrizine Dihydrochloride Oxidation in Aqueous Acid Medium by Chloramine-T 氯胺-T 在酸性水介质中催化盐酸西曲嗪二盐酸盐的无催化和 Ce(IV) 催化动力学比较研究

Asian Journal of Chemistry Pub Date : 2024-03-30 DOI: 10.14233/ajchem.2024.31305

M.K. Arpitha, K.M. Vidyashree, H.S. Sonakshi, H.P. Jayadevappa

引用次数: 0

Effect of Phosphorus-Nitrogen based Flame-Retardant Combined with Zinc Borate on Thermal Stability and Flame Retardancy of Epoxy Clay Nanocomposites 磷氮系阻燃剂与硼酸锌对环氧粘土纳米复合材料热稳定性和阻燃性的影响

Asian Journal of Chemistry Pub Date : 2024-03-30 DOI: 10.14233/ajchem.2024.31240

Kismat Dhillon, Vishal Soni, J. Dahiya

{"title":"Effect of Phosphorus-Nitrogen based Flame-Retardant Combined with Zinc Borate on Thermal Stability and Flame Retardancy of Epoxy Clay Nanocomposites","authors":"Kismat Dhillon, Vishal Soni, J. Dahiya","doi":"10.14233/ajchem.2024.31240","DOIUrl":"https://doi.org/10.14233/ajchem.2024.31240","url":null,"abstract":"A phosphorus-nitrogen containing 6,6'-(piperazine-1,4-diyl)bis(6H-dibenzo[c,e][1,2]oxaphosphinine 6-oxide) (DOPO-PZ) flame-retardant was synthesized and its effect combined with zinc borate (ZnB) and nanoclay (NC) on thermal stability and flame retardancy of epoxy resin was studied. Various epoxy composites containing DOPO, DOPO-PZ, ZnB and NC using curing agent diaminodiphenylsulfone (DDS) were prepared. The X-ray diffraction (XRD) and transmission electron microscope (TEM) micrographs of the composites showed intercalated nanostructure of epoxy-clay nanocomposites. In thermogravimetric analysis (TGA), pure epoxy gave 3.4% char yield at 700 ºC in nitrogen atmosphere, while in case of EP/DOPO-PZ/ZnB/NC sample having 1% phosphorus content, 5 wt.% zinc borate (ZnB) and 3 wt.% nanoclay (NC), the char yield is increased to 24.0%. Differential scanning calorimetry (DSC) study showed decrease in the glass transition temperature (Tg) on the addition of flame-retardant due to plasticization effect and increase in Tg on addition of nanoclay due to formation of nanostructure of epoxy composites. The EP/DOPO-PZ/ZnB/NC nanocomposite sample exhibited a limiting oxygen index (LOI) value of 29.2% and passed the UL-94 test with a V-0 rating and thus achieved a sufficient flame retardancy.","PeriodicalId":8494,"journal":{"name":"Asian Journal of Chemistry","volume":"6 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140361501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Magnesium Powder-Catalyzed, Highly Efficient, Solvent-Free Synthesis of Amides through N-Acetylation of Amines and their Antibacterial Activity 镁粉催化下通过胺的 N-乙酰化无溶剂高效合成酰胺及其抗菌活性

Asian Journal of Chemistry Pub Date : 2024-03-30 DOI: 10.14233/ajchem.2024.31196

Najma Bajracharya, Sunita Shrestha, G. B. Bajracharya

引用次数: 0

Sol-Gel Spin Coated Transparent Single-TiO2 and SiO2 Thin Film on Glass for Opto-electronic Applications 用于光电子应用的玻璃上溶胶-凝胶旋涂透明单二氧化钛和二氧化硅薄膜

Asian Journal of Chemistry Pub Date : 2024-03-30 DOI: 10.14233/ajchem.2024.30616

S. Sigamani, M.V. Someswararao, V. Swaminatham

{"title":"Sol-Gel Spin Coated Transparent Single-TiO2 and SiO2 Thin Film on Glass for Opto-electronic Applications","authors":"S. Sigamani, M.V. Someswararao, V. Swaminatham","doi":"10.14233/ajchem.2024.30616","DOIUrl":"https://doi.org/10.14233/ajchem.2024.30616","url":null,"abstract":"Great attention has been given on the sol-gel synthesis and spin-coating deposition techniques for the fabrication of various thin films. Because of its simple technique to fabricate dielectric (metal oxide) films using tetraethyl orthosilicate and titanium isopropoxide precursors. In this work, transparent single layer of SiO2 and TiO2 thin film was deposited on a glass substrate and characterized by FTIR, UV-visible spectroscopy, fluorescence and scanning electron microscopy techniques. The single layer thin film was mechanically stable and strong by adhering to glass substrates. The FTIR transmittance spectrum evidenced the existence of Si-O-Si and Ti-O-Ti at ~1100 and 1400 cm-1. The UV-visible absorbance spectra of single layer of SiO2 and TiO2 thin films showed strong absorption at below 00 nm. The excitation wavelength at 380 nm, the fluorescence spectra of both thin films showed the highest emission spectrum in between 733-798 nm. The SEM studies confirmed the smooth surface in both SiO2 and TiO2 layers. Further, it could be useful for various applications such as back reflector in solar cells, anti-reflection coatings, hydrophobic and anti-fogging materials. ","PeriodicalId":8494,"journal":{"name":"Asian Journal of Chemistry","volume":"54 47","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140363010","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis of Novel ZrO2/g-C3N4/CuFe2O4 Nanocomposite and Its Efficient Photocatalytic Degradation of Amoxicillin, Chlorpyrifos and Methylene Blue 新型 ZrO2/g-C3N4/CuFe2O4 纳米复合材料的合成及其对阿莫西林、毒死蜱和亚甲基蓝的高效光催化降解作用

Asian Journal of Chemistry Pub Date : 2024-02-28 DOI: 10.14233/ajchem.2024.31176

Pandurangan Vijayalakshmi, P. Shanmugavelan, P. M. Mareeswaran, Kiruthiga Kandasamy

{"title":"Synthesis of Novel ZrO2/g-C3N4/CuFe2O4 Nanocomposite and Its Efficient Photocatalytic Degradation of Amoxicillin, Chlorpyrifos and Methylene Blue","authors":"Pandurangan Vijayalakshmi, P. Shanmugavelan, P. M. Mareeswaran, Kiruthiga Kandasamy","doi":"10.14233/ajchem.2024.31176","DOIUrl":"https://doi.org/10.14233/ajchem.2024.31176","url":null,"abstract":"A novel ZrO2/g-C3N4/CuFe2O4 nanocomposite was synthesized by wet impregnation method and its photocatalytic degradation efficacy is studied on the organic pollutants viz. antibiotic drug (amoxicillin), pesticide (chlorpyrifos) and dye (methylene blue) under both dark and visible light conditions in liquid medium. The synthesized nanocomposite and its photocatalytic degradation studies were well characterized using XRD, TEM, EDS, XPS, UV-Vis DRS, PL, BET and EIS analytical techniques. Among three organic pollutants, the photocatalytic degradation of methylene blue pollutant is higher (99.5%, k = 0.0533 min-1) than that of chlorpyrifos (97.3% k = 0.0367 min-1) and amoxicillin (64.6%, k = 0.0109 min-1) under visible light exposure for 90 min using ZrO2/g-C3N4/CuFe2O4 nanocomposite as a photocatalyst. The nanocomposite showed excellent degradation efficiency under the irradiation of visible light while the degradation under dark condition is highly limited. As a control experiment the individual g-C3N4, ZrO2 and CuFe2O4 components of the nanocomposite under the same conditions possess limited degradation efficiency than that of ZrO2/g-C3N4/CuFe2O4 nanocomposite. A possible photo-degradation mechanism is also proposed. Efficient treatment of wastewater could be possible with this novel nanocomposite ZrO2/g-C3N4/CuFe2O4 due to its high stability and reusability.","PeriodicalId":8494,"journal":{"name":"Asian Journal of Chemistry","volume":"35 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140418591","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis, Characterization, Docking Studies and in vitro Response of New Camptothecin Derivatives towards Oral Squamous Cell Carcinoma 新喜树碱衍生物的合成、表征、对接研究以及对口腔鳞状细胞癌的体外反应

Asian Journal of Chemistry Pub Date : 2024-02-28 DOI: 10.14233/ajchem.2024.31038

S. Ugrappa, D. Jagadeesan, P. Lalitha, M. Ravichandran, M. Solyappan, G.H. Khor, Y.S. Wu, V. Balakrishnan, D. Thangeswaran, S. Fuloria

{"title":"Synthesis, Characterization, Docking Studies and in vitro Response of New Camptothecin Derivatives towards Oral Squamous Cell Carcinoma","authors":"S. Ugrappa, D. Jagadeesan, P. Lalitha, M. Ravichandran, M. Solyappan, G.H. Khor, Y.S. Wu, V. Balakrishnan, D. Thangeswaran, S. Fuloria","doi":"10.14233/ajchem.2024.31038","DOIUrl":"https://doi.org/10.14233/ajchem.2024.31038","url":null,"abstract":"Evidence suggests heterocyclic rings as the essential component of various available chemotherapeutics. Present study was aimed to carry out the molecular docking, synthesis, characterization and response of new camptothecin derivatives (NCDs) towards OSCC cell lines. To achieve the aim of the study, new camptothecin derivatives were designed to perform molecular docking against the target protein Human DNA Topoisomerase-1 (1T8I). Molecules 2 and 3 with high docking scores were subjected to synthesis. In current investigation, NCDs were synthesized by cyclization of imino analogue (2) into a new azetidinone derivative (3) on treatment with triethylamine and chloroacetyl chloride. Synthesized NCDs were characterized using IR, NMR and mass analysis. The NCDs were further subjected to antiproliferation study using CAL-27 (OSCC), followed by in vitro DNA relaxation assay and cell cycle analysis. The results of the docking of CPT-11 against Human DNA Topoisomerase-1 Duplex (PDB ID: 1T8I) in present study revealed compound 2 and 3 exhibited high docking score among all camptothecin analogues. Present study successfully synthesized and elucidated the structures of NCD 2 and 3. The antiproliferation study results revealed that NCD 2 and NCD 3 offered an IC50 of 34.73 µg/mL and 62.5 µg/mL, respectively. The DNA relaxation assay exhibited the inhibition action of synthesized NCDs (IC50 concentration) against topoisomerase enzyme. Moreover, the cell cycle analysis revealed that both NCDs arrested cancer cells in ‘S’ phase. Though the present study highlights the potential of NCDs against oral squamous cell carcinoma, however, the present study also recommends that the synthesized NCDs must be further evaluated for preclinical and clinical significance.","PeriodicalId":8494,"journal":{"name":"Asian Journal of Chemistry","volume":"107 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140423717","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancing Liquid Crystal Properties through Nanoparticle Doping: A Mini Review 通过纳米粒子掺杂增强液晶特性：微型综述

Asian Journal of Chemistry Pub Date : 2024-02-28 DOI: 10.14233/ajchem.2024.31058

Bhaskar Kashyap, Ayushi Saini, Arshi Rastogi

{"title":"Enhancing Liquid Crystal Properties through Nanoparticle Doping: A Mini Review","authors":"Bhaskar Kashyap, Ayushi Saini, Arshi Rastogi","doi":"10.14233/ajchem.2024.31058","DOIUrl":"https://doi.org/10.14233/ajchem.2024.31058","url":null,"abstract":"Liquid crystals doped with nanoscale particles have recently acquired popularity, improving their capabilities and applications. The impact of doping metallic and metal-oxide nanoparticles as well as other nanoparticles in liquid crystals is presented in this brief review. Silver nanoparticles (Ag NPs) have an effect on phase transitions, molecular alignment and electrical properties such as threshold voltage and response time. The optical tilt and electro-optical characteristics of gold nanoparticles (Au NPs) are improved. Metal-oxide nanoparticles such as MgO, ZnO, Al2O3, CuO and SiO2 enhance dielectric properties, mitigate screening effects, increase birefringence, and reduce light leakage. Doping carbon nanotubes (CNTs) influences impedance, optical transmittance and electro-optical properties. The review aims to study the effects of nanoparticle doping on liquid crystal features such as phase transitions, molecular alignment, electrical and optical properties, dielectric behavior, and impedance. A better understanding of these modifications can lead to more applications for liquid crystal in areas such as sensors, displays, optoelectronics, and photovoltaics.","PeriodicalId":8494,"journal":{"name":"Asian Journal of Chemistry","volume":"339 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140417364","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0