ChemRN EM Feeds最新文献_第2页

A Nano-Enzymatic Photoelectrochemical L-Cysteine Biosensor Based on Bi2MoO6 Modified Honeycomb TiO2 Nanotube Arrays Composite 基于Bi2MoO6修饰蜂窝TiO2纳米管阵列复合材料的纳米酶-光电电化学l -半胱氨酸生物传感器

ChemRN EM Feeds Pub Date : 1900-01-01 DOI: 10.2139/ssrn.3929277

Wanting Liu, Yanmei Xin, Congfei Yao, H. Cui, Y. Cang, Zhonghai Zhang, Y. Miao

{"title":"A Nano-Enzymatic Photoelectrochemical L-Cysteine Biosensor Based on Bi2MoO6 Modified Honeycomb TiO2 Nanotube Arrays Composite","authors":"Wanting Liu, Yanmei Xin, Congfei Yao, H. Cui, Y. Cang, Zhonghai Zhang, Y. Miao","doi":"10.2139/ssrn.3929277","DOIUrl":"https://doi.org/10.2139/ssrn.3929277","url":null,"abstract":"Improving light harvesting behavior and recognition sites of sensor is an effective way to achieve highly sensitive and selective detection of nano-enzymatic photoelectrochemical (PEC) L-cysteine (Cyst). In this work, the Bi2MoO6-TiO2 composite (BMO-HTNTs) with honeycomb TiO2 nanotube arrays (HTNTs) as light harvesting unit and Bi2MoO6 nanoparticles (BMO) as recognition unit was prepared. The typical honeycomb-nanoparticle heterostructure between HTNTs and BMO improves the separation efficiency of the electron-hole pairs. Moreover, BMO nanoparticles fully dispersed on HTNTs with large specific surface area provide more sites for Cyst recognition. The composite exhibited the enhanced light absorption and higher photocurrent density at 0.2 V (vs. Ag/AgCl), which was 4 times than that of HTNTs under simulated light. Ingeniously, Cyst can not only be specifically recognized through the Bi-S bonds but also act as electron donor to scavenge the photogenerated holes of BMO-HTNTs, resulting in the increase of PEC responses. The PEC sensor showed superior analytical performance for Cyst detection with two linear regression equations in the range of 500 nM to 500 μM and a detection limit of 150 nM. The results of the enzyme-free sensor on practical urine and serum samples demonstrated its promising application in biological monitoring.","PeriodicalId":310840,"journal":{"name":"ChemRN EM Feeds","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132250618","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: 6

Silicon Electrodeposition From the KCl-K 2SiF 6 Melt kcl - k2sif6熔体电沉积硅

ChemRN EM Feeds Pub Date : 1900-01-01 DOI: 10.2139/ssrn.3915517

T. Gevel, S. Zhuk, A. Suzdaltsev, Yuriy Zaikov

引用次数: 1

Dynamics of Soil Potassium Under Different Cropping Systems in Y.S.R Kadapa District of Andhra Pradesh, India 印度安得拉邦Kadapa地区不同种植制度下土壤钾的动态

ChemRN EM Feeds Pub Date : 1900-01-01 DOI: 10.2139/ssrn.3818965

Charankumar G. R, V. Munaswamy, T. G. Krishna, D. Subramanyam

{"title":"Dynamics of Soil Potassium Under Different Cropping Systems in Y.S.R Kadapa District of Andhra Pradesh, India","authors":"Charankumar G. R, V. Munaswamy, T. G. Krishna, D. Subramanyam","doi":"10.2139/ssrn.3818965","DOIUrl":"https://doi.org/10.2139/ssrn.3818965","url":null,"abstract":"Dynamics of soil potassium under five important cropping systems of Y.S.R. Kadapa district of Andhra Pradesh was studied. From each cropping system five surface and subsurface soil samples were collected from fallow – bengalgram, sunflower – sesame, paddy – paddy, groundnut monocropping and groundnut – groundnut cropping systems in 2018-2019. The available K content varied from 73.65 mg kg-1 to 282.80 mg kg-1 and from 51.30 mg kg-1 to 160.90 mg kg-1, water soluble K content varied from 5.5 mg kg-1 to 43.30 mg kg-1 and from 5.05 mg kg-1 to 17.25 mg kg-1, exchangeable K content varied from 68.10 mg kg-1 to 254.10 mg kg-1 and from 43.70 mg kg-1 to 144.05 mg kg-1, non-exchangeable K content varied from 309.95 mg kg-1 to 970.35 mg kg-1 and from 238.80 mg kg-1 to 623.00 mg kg-1, lattice K content varied from 11498.10 mg kg-1 to 23326.60 mg kg-1 and from 6460.20 mg kg-1 to 35828.20 mg kg-1 and total K content varied from 11920 mg kg-1 to 24190 mg kg-1 and from 6990 mg kg-1 to 33330 mg kg-1 in surface and sub-surface soils, respectively under different cropping systems. Available K ranged from 0.58 to 1.33 per cent and 0.11 to 1.58 per cent, water soluble K 0.07 to 0.18 per cent to 0.03 to 0.18 per cent and 0.03 to 0.18 per cent, exchangeable K 0.44 to 1.20 per cent and 0.14 to 1.44 per cent, non-exchangeable K 2.33 to 5.08 per cent and 1.15 to 6.26 per cent and lattice K 94.00 to 97.08 per cent and 92.16 to 98.68 per cent in surface and sub-surface soils of total potassium, respectively under different cropping systems. All the forms of K were correlated with each other revealing the existence of dynamic equilibrium among them.","PeriodicalId":310840,"journal":{"name":"ChemRN EM Feeds","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126104935","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

Electronic and Magnetic Signatures of Low-Lying Spin-Flip Excitonic States of Mn 12O 12-Acetate Mn 12o12 -乙酸盐低洼自旋翻转激子态的电子和磁特征

ChemRN EM Feeds Pub Date : 1900-01-01 DOI: 10.2139/ssrn.3830022

Karma Dema, Z. Hooshmand, M. Pederson

引用次数: 0

Synthesis, Single Crystal (XRD), Spectral Characterization (FT-IR, FT-Raman, 1HNMR, 13CNMR, 119Sn NMR), Computational (DFT), Quantum Chemical Modeling and Anticancer Activity Studies of Di(p-Bromobenzyl) (Dibromo) (1, 10-Phenanthroline) Tin (IV) Complex 二(对溴苄基)(二溴)(1,10 -菲罗啉)锡配合物的合成、单晶(XRD)、光谱表征(FT-IR、FT-Raman、1HNMR、13CNMR、119Sn NMR)、计算(DFT)、量子化学建模及抗癌活性研究

ChemRN EM Feeds Pub Date : 1900-01-01 DOI: 10.2139/ssrn.3875674

A. Latha, V. Maheswari, K. Manoj, N. Elangovan, S. Chandrasekar

{"title":"Synthesis, Single Crystal (XRD), Spectral Characterization (FT-IR, FT-Raman, 1HNMR, 13CNMR, 119Sn NMR), Computational (DFT), Quantum Chemical Modeling and Anticancer Activity Studies of Di(p-Bromobenzyl) (Dibromo) (1, 10-Phenanthroline) Tin (IV) Complex","authors":"A. Latha, V. Maheswari, K. Manoj, N. Elangovan, S. Chandrasekar","doi":"10.2139/ssrn.3875674","DOIUrl":"https://doi.org/10.2139/ssrn.3875674","url":null,"abstract":"The complex Di(p-bromobenzyl) (dibromo) (1, 10-phenanthroline) tin (IV) complex (4BRBR) were synthesized and experimentally proved at FT-IR, FT-Raman, 1HNMR, 13CNMR, 119SnNMR and XRD. DFT method used for comparison of theoretical and experimental method, theoretical method optimized to use for B3LYP/LanL2DZ basic set level. The complete vibrational spectral investigation was designed from VEDA program package. Quantum chemical calculated with help of Multiwfn software package. X-ray study confirmed the complex and crystallization by monoclinic space group with P21/c, hydrogen bonding formed through bromine atom such as C---H---Br (Sn-Br---H-Phen), and weak interaction observed at C---H---Br. The crystal of the complex 4BRBR shows tin atom is in regular octahedral geometry. Finally anticancer activity also studied in this complex in various cell lines like PC3 (Human prostate cancer cell), MCF7 (Breast cancer cell), U937 (Blood cancer cell) and U87 Brain cancer cell). The anticancer activity results clearly indicate the MCF7 cell line (Breast cancer cell) has higher anticancer activity compared to standard drug cisplatin and other cell lines which is 7.8 µg/ml concentrations.","PeriodicalId":310840,"journal":{"name":"ChemRN EM Feeds","volume":"33 5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125714107","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

Aqueous Polyethylene Glycols as Green Reaction Media for the Nitration of Aromatic and Heterocyclic Compounds in Presence of Sodium Nitrite Under Transition Metal-Free and Mineral Acid-Free Conditions- A Kinetic Study 在无过渡金属和无机酸条件下，聚乙二醇作为绿色反应介质在亚硝酸钠存在下硝化芳香族和杂环化合物的动力学研究

ChemRN EM Feeds Pub Date : 1900-01-01 DOI: 10.2139/ssrn.3949252

Sudhakar Chary Voruvala, Srinivas Pasnoori, Krishnaiah Ganga, Chinna Rajanna Kamatala, Umesh Kumar Utkoor

引用次数: 0

Synthesis, Characterization and Biological Evaluation of Metal Complexes (Zinc, Iron, Copper, Antimony, and Tin) of Sulphanilamide Derivatives 磺胺衍生物金属配合物(锌、铁、铜、锑和锡)的合成、表征和生物学评价

ChemRN EM Feeds Pub Date : 1900-01-01 DOI: 10.2139/ssrn.3894864

Anila Tahir, K. Shahid, M. Shahzad, Usman Aftab

{"title":"Synthesis, Characterization and Biological Evaluation of Metal Complexes (Zinc, Iron, Copper, Antimony, and Tin) of Sulphanilamide Derivatives","authors":"Anila Tahir, K. Shahid, M. Shahzad, Usman Aftab","doi":"10.2139/ssrn.3894864","DOIUrl":"https://doi.org/10.2139/ssrn.3894864","url":null,"abstract":"Due to the emerging problem of antibiotic resistance. Its high time that new medicinal products need to be investigated to tackle this problem. Synthesis and characterization of metal-based Sulfa drugs have gained a lot of attention in past few decades, because of their enhanced therapeutic applications. Current study includes the synthesis and characterization of a sulphanilamide ligand and its metal complexes by reacting Sulphanilamide and P-toluene sulphonyl chloride and then reacting them with ten different metals like zinc, copper, iron, tin and antimony to make their metal complexes and to prepare new metallodrugs with improved biological activities. Biological activity of the compounds were determined by screening ligand and metal complexes for antibacterial, antifungal and antioxidant potential. All complexes were successfully made and are found to have significant antibacterial, antifungal and antioxidant activity. In Infrared Spectroscopes the absence of primary stretch from the ligand in metal complexes confirms the attachment of metal. The appearance of new IR band which were absent in ligand spectra are assigned as metal bonds with NH and support the formation of metal complexes. In the 1 H NMR and 13 C NMR spectra of all complexes, the change in the appearance of peaks and formation of proton signals for the groups attached to metals confirmed the formation of complexes. In the spectra of 13 C NMR of all complexes the peaks representing specific carbon confirm the formation of complexes. The groups attached with added metal complexes also showed their peaks which are in agreement with the proposed structures. The results of biological assays showed improved antibacterial, antifungal and antioxidant activity in all metal complexes than the ligand.","PeriodicalId":310840,"journal":{"name":"ChemRN EM Feeds","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125062956","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

Palladium (II) Complexes of Azoithiophenyl Tridentate SNS Donor System: Synthesis, Spectroscopic Properties, Electrochemistry, Structural Characterization, and Biological Activity 偶氮噻吩基三叉齿SNS供体体系钯配合物的合成、光谱性质、电化学、结构表征和生物活性

ChemRN EM Feeds Pub Date : 1900-01-01 DOI: 10.2139/ssrn.3830023

M. Al-Noaimi, F. Awwadi, Azzam Aljammal, Wamidh H. Talib, Muhannad I. Massadeh, A. Mahmod

{"title":"Palladium (II) Complexes of Azoithiophenyl Tridentate SNS Donor System: Synthesis, Spectroscopic Properties, Electrochemistry, Structural Characterization, and Biological Activity","authors":"M. Al-Noaimi, F. Awwadi, Azzam Aljammal, Wamidh H. Talib, Muhannad I. Massadeh, A. Mahmod","doi":"10.2139/ssrn.3830023","DOIUrl":"https://doi.org/10.2139/ssrn.3830023","url":null,"abstract":"Palladium complexes, [Pd(L)(OAc))] (1-2), have been synthesized by reacting Pd(OAc)2 and new thioether containing azo ligand (L) (L = 2(RS) C6H4N=NC(COCH3)-SC6H5,  R= C6H5 (L1), CH3(L2)). The complexes and their ligand have been characterized by spectroscopic techniques (IR, NMR and UV–Vis) and geometries have been confirmed by X-ray crystal structures of 1 and L1. The electronic spectra of the complexes show moderately intense LMCT band along with intense ILCT transitions. Cyclic voltammetric studies show one quasi-irreversible reduction couple L-1/0 for the two ligands and L2-/- for the two complexes. The antitumor potential of the ligands and complexes was investigated preliminarily by applying MTT assay on cancer and normal cell lines along with cis platin as a standard anticancer drug. It was found that the palladium (Ⅱ) complexes are more cytotoxic toward cancer cells than their analogous ligands. Complex 1 and 2 showed high activity against human breast cancer cells (T47D) with IC₅₀ values of 61.6 ±12 and 72.3 ±8.4 μM/ml, respectively. However, complex 1 revealed some toxicity in normal cell line (VERO). On the other hand, both complexes exhibited less potency in human colon cancer cells (HCT 116 cell line). These finding determined that the antiproliferative activity is improved when the ligands (L1-L2) are integrated into the metal center.","PeriodicalId":310840,"journal":{"name":"ChemRN EM Feeds","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121835418","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

Structural Insight on Thiourea Doped Graphene: An Efficient Electrochemical Sensor for Voltammetric Detection of Morphine in Alcoholic and Non-Alcoholic Beverages 硫脲掺杂石墨烯的结构洞察:一种用于酒精和非酒精饮料中吗啡伏安检测的高效电化学传感器

ChemRN EM Feeds Pub Date : 1900-01-01 DOI: 10.2139/ssrn.3940124

V. Prakash, G. Garima, N. Prabhakar, G. Kaur, Ankur Diwan, S. Mehta, Shuchi Sharma

{"title":"Structural Insight on Thiourea Doped Graphene: An Efficient Electrochemical Sensor for Voltammetric Detection of Morphine in Alcoholic and Non-Alcoholic Beverages","authors":"V. Prakash, G. Garima, N. Prabhakar, G. Kaur, Ankur Diwan, S. Mehta, Shuchi Sharma","doi":"10.2139/ssrn.3940124","DOIUrl":"https://doi.org/10.2139/ssrn.3940124","url":null,"abstract":"Morphine (MO) has been one of the most talked-about abused drug amongst all the opiates. In this context, the present work focuses on a facile and reliable method of morphine detection principled on electrochemical techniques. The excellent electronic properties of chemically synthesized nitrogen and sulphur doped graphene (NSG) have been utilized to detect MO in phosphate buffer solution (PBS) and beverages. The electrochemical property of the NSG with varying concentrations of the dopant (thiourea) and the un-doped graphene (G) material has been studied. All the materials have been characterized using Fourier transform infrared spectroscopy, X-ray diffraction , field emission scanning electron microscopy-energy dispersive X-ray spectroscopy, Raman spectroscopy, X-ray photoelectron spectroscopy, electrochemical impedance spectroscopy, and cyclic voltammetry. The electrochemical detection of MO has been carried out using DPV and CV. NSG material has been seen to proliferate the electron transfer of the oxidized MO and results in an enhanced current response. The detection response of MO has been noticed to be dependent on pH environments (2 to 11) and was found to be a proton-dependent mechanistic approach. The LDR, and LOD of MO, obtained using NSG 4 as the electrode, have been calculated as 294 µg/mL to 0.57 µg/mL, and 0.26 µg/mL, respectively. Furthermore, the electrode modifier showcased demonstrated fairly good stability and repeatability. The morphine detection results reported in this work show a reasonably good LOD in comparison to earlier reports. The detection of spiked MO in soft and hard drinks without any pre-treatment procedures has also been demonstrated.","PeriodicalId":310840,"journal":{"name":"ChemRN EM Feeds","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130195450","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: 5

Molecular Engineering, Synthesis and Electrochemical Properties of Carbazole Derivatives for Solar Cell Applications: First Principle Theoretical Study 太阳能电池用咔唑衍生物的分子工程、合成及电化学性质:第一性原理理论研究

ChemRN EM Feeds Pub Date : 1900-01-01 DOI: 10.2139/ssrn.3919709

Mr. Kannan Periyasamy, Mr. I. Ragavan, Dr. P.M. P. M. Anbarasan, P. Sakthivel

{"title":"Molecular Engineering, Synthesis and Electrochemical Properties of Carbazole Derivatives for Solar Cell Applications: First Principle Theoretical Study","authors":"Mr. Kannan Periyasamy, Mr. I. Ragavan, Dr. P.M. P. M. Anbarasan, P. Sakthivel","doi":"10.2139/ssrn.3919709","DOIUrl":"https://doi.org/10.2139/ssrn.3919709","url":null,"abstract":"Great progress has been made in developing organic compounds by modifying carbazole (Cz) based D-π-A type dye molecules viz., Cz-1, Cz-2 and Cz-3 was successfully designed and synthesized. Herein, we report the synthesis, photophysical properties, scanning electron microscope and electrochemical characterization (quasi-reversible oxidation processes) of three Cz based compounds are investigated. The calculated results agree well with the available experimental data of absorption spectra, HOMO-LUMO energy levels and band gaps using Time dependent density functional theory (TD-DFT) theory. The results from Natural bond orbital (NBO) calculations have been analyzed in terms of the computational electronic structure and charge transfer or conjugative interaction in molecular systems. The result is fluorescence time-correlated single photon counting ranged between 4.32, 4.25, 13.2 ns and green to blue (λPL = 431–881 nm) emission for complexes 1–3 in DMF solution. Cz-3 compounds showed excellent photovoltaic properties with power conversion efficiencies of 5.68%. These results clearly reveal that modification of the electron-withdrawing capability in D-π-A conjugated metal-free organic is an effective way to improve the optical and electrical properties of the metal free organic photovoltaic device.","PeriodicalId":310840,"journal":{"name":"ChemRN EM Feeds","volume":"264 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120871141","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