Pub Date : 2021-01-18DOI: 10.56042/ijca.v60i1.36947
T. Sayin, Duran Karakaş
[Ni(dcda-O-Me)2] 2+ (1), [Ni(dcda-O-Et)2] 2+ (2), [Ni(dcda-O-nPr)2] 2+ (3), and [Ni(dcda-O-nBu)2] 2+ (4) complexes (dcda-O-R is dicyandiamide ligands with alkoxy-derived) have been optimized in the gas phase at B3LYP/LANL2DZ/631+G(d,p) level. Computational structure characterization has been performed from the structural parameters, IR spectra, H-NMR, C-NMR chemical shift values. It has been found that the central metal atom geometry in the complexes is a distorted square plane. Some electronic structure descriptors of the complexes are calculated in the gas phase and nonlinear optical properties are predicted. Complex 1 is found as the most suitable compound to produce optical material. The complexes are optimized at the same level in the aqueous phase to determine antitumor activity. Some electronic structure descriptors are calculated and molecular docking calculations are made against the 3WZE protein. According to the calculated electronic structure descriptors and molecular docking results, it is found that the complex 3 has the highest antitumor activity against the selected target protein.
在B3LYP/LANL2DZ/631+G(d,p)水平气相优化了[Ni(dda - o - me)2] 2+(1)、[Ni(dda - o - et)2] 2+(2)、[Ni(dda - o - npr)2] 2+(3)和[Ni(dda - o - nbu)2] 2+(4)配合物(dda - o - r是烷氧基衍生的双氰胺配体)。从结构参数、红外光谱、H-NMR、C-NMR化学位移值进行了计算结构表征。发现配合物的中心金属原子几何形状是一个扭曲的方形平面。计算了配合物在气相中的一些电子结构描述符，并对其非线性光学性质进行了预测。配合物1是制备光学材料最合适的化合物。这些配合物在水相中以相同的水平进行优化，以确定抗肿瘤活性。计算了一些电子结构描述符，并对3WZE蛋白进行了分子对接计算。根据计算的电子结构描述子和分子对接结果，发现复合物3对所选靶蛋白具有最高的抗肿瘤活性。
{"title":"Computational structure characterization, nonlinear optical properties and antitumor activities of Nickel(II) complexes containing alkoxy-derived dicyandiamide ligands","authors":"T. Sayin, Duran Karakaş","doi":"10.56042/ijca.v60i1.36947","DOIUrl":"https://doi.org/10.56042/ijca.v60i1.36947","url":null,"abstract":"[Ni(dcda-O-Me)2] 2+ (1), [Ni(dcda-O-Et)2] 2+ (2), [Ni(dcda-O-nPr)2] 2+ (3), and [Ni(dcda-O-nBu)2] 2+ (4) complexes (dcda-O-R is dicyandiamide ligands with alkoxy-derived) have been optimized in the gas phase at B3LYP/LANL2DZ/631+G(d,p) level. Computational structure characterization has been performed from the structural parameters, IR spectra, H-NMR, C-NMR chemical shift values. It has been found that the central metal atom geometry in the complexes is a distorted square plane. Some electronic structure descriptors of the complexes are calculated in the gas phase and nonlinear optical properties are predicted. Complex 1 is found as the most suitable compound to produce optical material. The complexes are optimized at the same level in the aqueous phase to determine antitumor activity. Some electronic structure descriptors are calculated and molecular docking calculations are made against the 3WZE protein. According to the calculated electronic structure descriptors and molecular docking results, it is found that the complex 3 has the highest antitumor activity against the selected target protein.","PeriodicalId":54992,"journal":{"name":"Indian Journal of Chemistry Section A-Inorganic Bio-Inorganic Physical Theoretical & Analytical Chemistry","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2021-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88868228","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-18DOI: 10.56042/ijca.v60i1.32038
Mohammad Rezaeea, Faezeh Khalilianb, Alireza Dehganb, Parisa Tajer-Mohammad-Ghazvinia
In the present study, homogeneous liquid-liquid microextraction via flotation assistance method is described for preconcentration of trace amounts of Mn(II). 1-(2-pyridylazo)-2-naphthol (PAN) is used as a ligand. The enriched analyte in the floated organic phase has been determined by inductively coupled plasma-mass spectrometry (ICP-MS). In this work, low density organic solvent is used and there is no need of centrifugation. Several factors influencing the microextraction efficiency, such as pH, the amount of chelating agent, nature and volume of extraction and homogeneous solvents have been investigated and optimized. Under the optimum conditions, the linear dynamic range is 1.0-500.0 ng L -1 with a correlation coefficient of 0.9998 and the detection limit of 0.1 ng L -1 . The proposed method has been successfully applied for separation and determination of manganese in different water samples.
本研究采用助浮选均相液液微萃取法对微量Mn(II)进行预富集。1-(2-吡啶偶氮)-2-萘酚(PAN)被用作配体。采用电感耦合等离子体质谱法(ICP-MS)测定了浮相中富集的分析物。本工作采用低密度有机溶剂，不需要离心。考察了pH、螯合剂用量、萃取物性质和体积、均相溶剂等因素对微萃取效率的影响，并进行了优化。在最佳条件下，线性动态范围为1.0 ~ 500.0 ng L -1，相关系数为0.9998，检出限为0.1 ng L -1。该方法已成功地应用于不同水样中锰的分离测定。
{"title":"Homogeneous liquid-liquid microextraction via flotation assistance for determination of trace amounts of manganese prior to inductively coupled plasma-mass spectrometry","authors":"Mohammad Rezaeea, Faezeh Khalilianb, Alireza Dehganb, Parisa Tajer-Mohammad-Ghazvinia","doi":"10.56042/ijca.v60i1.32038","DOIUrl":"https://doi.org/10.56042/ijca.v60i1.32038","url":null,"abstract":"In the present study, homogeneous liquid-liquid microextraction via flotation assistance method is described for preconcentration of trace amounts of Mn(II). 1-(2-pyridylazo)-2-naphthol (PAN) is used as a ligand. The enriched analyte in the floated organic phase has been determined by inductively coupled plasma-mass spectrometry (ICP-MS). In this work, low density organic solvent is used and there is no need of centrifugation. Several factors influencing the microextraction efficiency, such as pH, the amount of chelating agent, nature and volume of extraction and homogeneous solvents have been investigated and optimized. Under the optimum conditions, the linear dynamic range is 1.0-500.0 ng L -1 with a correlation coefficient of 0.9998 and the detection limit of 0.1 ng L -1 . The proposed method has been successfully applied for separation and determination of manganese in different water samples.","PeriodicalId":54992,"journal":{"name":"Indian Journal of Chemistry Section A-Inorganic Bio-Inorganic Physical Theoretical & Analytical Chemistry","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2021-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82166025","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-18DOI: 10.56042/ijca.v60i1.34359
R. Sharmaa, P. Choukseya, S. Amlatheb
Environmental pollution and its consequences are of global concern. There is an urgent need of development of simple, low-cost detection or diagnostic point of care devices to detect, analyze and determine the pollutants in various environmental, food and biological samples. Such development will be critically important for improvisation of human health and quality of life. Toxic heavy metals potential contaminates and has lethal effects on deterioration of environment and thereby on human health. Paper based analytical sensors are an efficient diagnostic point-of-care devices being cheap, robust, user friendly and environmental-friendly. We have proposed a paper-based sensor for detection and quantitative determination of Lead by immobilization of potassium iodide and ninhydrin over paper platform. A bright yellow colour of varying intensity develops on coming in contact with samples contaminated with lead. The coloured area is then scanned and images are transferred to image processing tool of MATLAB software to read their RGB values. The effective intensities are then calculated mathematically. The developed sensor determines the contamination of lead up to 0.01 ppm. Thus, the proposed paper based analytical sensor is potential diagnostic point –of-care device.
{"title":"An improved simple, robust, cheap and potential diagnostic device for Lead(II)","authors":"R. Sharmaa, P. Choukseya, S. Amlatheb","doi":"10.56042/ijca.v60i1.34359","DOIUrl":"https://doi.org/10.56042/ijca.v60i1.34359","url":null,"abstract":"Environmental pollution and its consequences are of global concern. There is an urgent need of development of simple, low-cost detection or diagnostic point of care devices to detect, analyze and determine the pollutants in various environmental, food and biological samples. Such development will be critically important for improvisation of human health and quality of life. Toxic heavy metals potential contaminates and has lethal effects on deterioration of environment and thereby on human health. Paper based analytical sensors are an efficient diagnostic point-of-care devices being cheap, robust, user friendly and environmental-friendly. We have proposed a paper-based sensor for detection and quantitative determination of Lead by immobilization of potassium iodide and ninhydrin over paper platform. A bright yellow colour of varying intensity develops on coming in contact with samples contaminated with lead. The coloured area is then scanned and images are transferred to image processing tool of MATLAB software to read their RGB values. The effective intensities are then calculated mathematically. The developed sensor determines the contamination of lead up to 0.01 ppm. Thus, the proposed paper based analytical sensor is potential diagnostic point –of-care device.","PeriodicalId":54992,"journal":{"name":"Indian Journal of Chemistry Section A-Inorganic Bio-Inorganic Physical Theoretical & Analytical Chemistry","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2021-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73475579","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-18DOI: 10.56042/ijca.v60i1.39048
{"title":"Synthesis, crystal structure and properties of a yttrium complex based on mixed functional ligands","authors":"","doi":"10.56042/ijca.v60i1.39048","DOIUrl":"https://doi.org/10.56042/ijca.v60i1.39048","url":null,"abstract":"","PeriodicalId":54992,"journal":{"name":"Indian Journal of Chemistry Section A-Inorganic Bio-Inorganic Physical Theoretical & Analytical Chemistry","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2021-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78326019","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-07DOI: 10.56042/ijca.v60i5.42530
Uday Sankar Agarwalla
Molybdenum- and tungsten-containing (M 7 O 24 6- , M = Mo or W) layered double hydroxides (LDHs) with Mg 2+ and Al 3+ cations in the brucite-like layer have been prepared by direct anion exchange, starting from the corresponding terephthalate precursor. The solids have been characterized by various instrumental techniques such as elemental chemical analysis, powder X-ray diffraction, infrared spectroscopy, scanning electron microscopy, transmission electron microscopy and thermogravimetric analysis. The M 7 O 24 6- intercalated LDHs have been explored as catalysts for the selective oxidation of a series of alkenes at room temperature using safer, inexpensive and environmentally benign hydrogen peroxide as oxidant. Reaction conditions have been optimized considering different reaction parameters to achieve maximum conversion in the catalytic oxidation reaction. Recycling of the catalyst has shown that it can be reused up to three more cycles without significant loss of performance.
以相应的对苯二甲酸盐前驱体为原料，采用直接阴离子交换法制备了含钼和含钨(m7o246 -， M = Mo或W)的镁离子和铝离子层状双氢氧化物(LDHs)。通过元素化学分析、粉末x射线衍射、红外光谱、扫描电子显微镜、透射电子显微镜和热重分析等仪器技术对固体进行了表征。采用安全、廉价、环保的双氧水作为氧化剂，研究了m7o246 -插层低密度烃在室温下选择性氧化一系列烯烃的催化剂。考虑不同的反应参数，对反应条件进行了优化，以达到催化氧化反应的最大转化率。催化剂的回收表明，它可以重复使用多达三个以上的循环，而不会有明显的性能损失。
{"title":"Mo- and W-containing layered double hydroxides: Mild and selective oxidation of alkenes with H2O2","authors":"Uday Sankar Agarwalla","doi":"10.56042/ijca.v60i5.42530","DOIUrl":"https://doi.org/10.56042/ijca.v60i5.42530","url":null,"abstract":"Molybdenum- and tungsten-containing (M 7 O 24 6- , M = Mo or W) layered double hydroxides (LDHs) with Mg 2+ and Al 3+ cations in the brucite-like layer have been prepared by direct anion exchange, starting from the corresponding terephthalate precursor. The solids have been characterized by various instrumental techniques such as elemental chemical analysis, powder X-ray diffraction, infrared spectroscopy, scanning electron microscopy, transmission electron microscopy and thermogravimetric analysis. The M 7 O 24 6- intercalated LDHs have been explored as catalysts for the selective oxidation of a series of alkenes at room temperature using safer, inexpensive and environmentally benign hydrogen peroxide as oxidant. Reaction conditions have been optimized considering different reaction parameters to achieve maximum conversion in the catalytic oxidation reaction. Recycling of the catalyst has shown that it can be reused up to three more cycles without significant loss of performance.","PeriodicalId":54992,"journal":{"name":"Indian Journal of Chemistry Section A-Inorganic Bio-Inorganic Physical Theoretical & Analytical Chemistry","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2021-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86312985","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-12-16DOI: 10.56042/ijca.v59i12.31041
Sudesh M. Morajkar, B. R. Srinivasan
A convenient and cost-effective method is reported for the preparation of gram quantities of an ammonium-rich Mo compound viz. diammonium monomolybdate(VI) (NH 4 ) 2 MoO 4 ( 1 ). The process involves a thorough grinding of a commercial sample of ammonium heptamolybdate tetrahydrate (NH 4 ) 6 [Mo 7 O 24 ]ꞏ4H 2 O with an excess of ammonium bicarbonate followed by thermal treatment. The facile formation of ( 1 ) is confirmed by its characteristic Raman spectrum. The use of Raman spectroscopy to distinguish between tetrahedral monomolybdate(VI) and heptamolybdate, dichromate and monochromate(VI), paratungstate and monotungstate(VI) as well as the identification of the species present in ammoniacal solutions of MO 3 (M = Cr, Mo, W) are reported.
{"title":"Convenient synthesis and Raman spectral characterization of diammonium monomolybdate(VI)","authors":"Sudesh M. Morajkar, B. R. Srinivasan","doi":"10.56042/ijca.v59i12.31041","DOIUrl":"https://doi.org/10.56042/ijca.v59i12.31041","url":null,"abstract":"A convenient and cost-effective method is reported for the preparation of gram quantities of an ammonium-rich Mo compound viz. diammonium monomolybdate(VI) (NH 4 ) 2 MoO 4 ( 1 ). The process involves a thorough grinding of a commercial sample of ammonium heptamolybdate tetrahydrate (NH 4 ) 6 [Mo 7 O 24 ]ꞏ4H 2 O with an excess of ammonium bicarbonate followed by thermal treatment. The facile formation of ( 1 ) is confirmed by its characteristic Raman spectrum. The use of Raman spectroscopy to distinguish between tetrahedral monomolybdate(VI) and heptamolybdate, dichromate and monochromate(VI), paratungstate and monotungstate(VI) as well as the identification of the species present in ammoniacal solutions of MO 3 (M = Cr, Mo, W) are reported.","PeriodicalId":54992,"journal":{"name":"Indian Journal of Chemistry Section A-Inorganic Bio-Inorganic Physical Theoretical & Analytical Chemistry","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2020-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84586031","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-12-16DOI: 10.56042/ijca.v59i12.32035
A. Pal, S. Soni
The densities (ρ) and speeds of sound (u) for glycine in aqueous solutions of (0.01, 0.02, 0.03, and 0.04) mol·kg sulphathiazole drug have been measured at T = (288.15, 293.15, 298.15, 303.15 and 308.15) K, using vibrating tube digital densimeter and sound analyser Anton–Paar Model DSA 5000. The apparent molar properties like apparent molar volume (Vφ ), apparent molar adiabatic compressibility (Kφ ,s) and the apparent molar volume (Vφ ) and adiabatic compressibility at infinite dilution (Kφ ,s ) of glycine have been determined in water as well as in ternary mixtures containing sulphathiazole drug at different concentrations and at different temperatures from experimental data of densities and speeds of sound under atmospheric pressure. These data were also used to calculate the transfer parameters. Transfer parameters have been explained from the point of view of concentration dependence of solute-solute and solute-solvent interactions. The limiting apparent molar expansibility (Eφ ∘ ) values for glycine in aqueous solutions of drug have been calculated. The calculated values of thermal expansion coefficient (α2) have small and positive values. These results are explained on the basis of drug-amino acid water interactions and hydrophobic –hydrophilic interactions.
在T =(288.15, 293.15, 298.15, 303.15和308.15)K时，用振动管数字式密度计和Anton-Paar Model DSA 5000型声音分析仪测量了甘氨酸在(0.01,0.02,0.03和0.04)mol·kg磺胺噻唑药物水溶液中的密度ρ和声速u。根据常压下声速和密度的实验数据，测定了甘氨酸在不同浓度和不同温度下的水和含硫噻唑类药物的三元混合物中的表观摩尔体积(Vφ)、表观摩尔绝热压缩性(Kφ，s)和表观摩尔体积(Vφ)的表观摩尔性质(Kφ，s)。这些数据也被用来计算传递参数。从溶质-溶质和溶质-溶剂相互作用的浓度依赖性的角度解释了转移参数。计算了甘氨酸在药物水溶液中的极限表观摩尔膨胀(Eφ°)值。热膨胀系数(α2)的计算值较小且为正值。这些结果是基于药物-氨基酸-水相互作用和疏水-亲水性相互作用来解释的。
{"title":"Volumetric and acoustic studies of glycine in aqueous solutions of sulphathiazole drug at T=(288.15 to 308.15) K","authors":"A. Pal, S. Soni","doi":"10.56042/ijca.v59i12.32035","DOIUrl":"https://doi.org/10.56042/ijca.v59i12.32035","url":null,"abstract":"The densities (ρ) and speeds of sound (u) for glycine in aqueous solutions of (0.01, 0.02, 0.03, and 0.04) mol·kg sulphathiazole drug have been measured at T = (288.15, 293.15, 298.15, 303.15 and 308.15) K, using vibrating tube digital densimeter and sound analyser Anton–Paar Model DSA 5000. The apparent molar properties like apparent molar volume (Vφ ), apparent molar adiabatic compressibility (Kφ ,s) and the apparent molar volume (Vφ ) and adiabatic compressibility at infinite dilution (Kφ ,s ) of glycine have been determined in water as well as in ternary mixtures containing sulphathiazole drug at different concentrations and at different temperatures from experimental data of densities and speeds of sound under atmospheric pressure. These data were also used to calculate the transfer parameters. Transfer parameters have been explained from the point of view of concentration dependence of solute-solute and solute-solvent interactions. The limiting apparent molar expansibility (Eφ ∘ ) values for glycine in aqueous solutions of drug have been calculated. The calculated values of thermal expansion coefficient (α2) have small and positive values. These results are explained on the basis of drug-amino acid water interactions and hydrophobic –hydrophilic interactions.","PeriodicalId":54992,"journal":{"name":"Indian Journal of Chemistry Section A-Inorganic Bio-Inorganic Physical Theoretical & Analytical Chemistry","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2020-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78779138","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-12-16DOI: 10.56042/ijca.v59i12.31994
Hui Liu, Huaize Han, Meilin Liu, Yong Zhao
The electrodeposition of reduced graphene oxide and carbon nanotube (ErGO/CNTs) composite film modified electrode has been fabricated by electrochemical reduction of graphene oxide (GO) and MWNTs composite film coated on the surface of glassy carbon electrode (GCE). The results show that in 0.2 mol/L NaAc-HAc (pH= 4.5) buffer solution, cryptotanshinone produced a pair of sensitive redox peaks with peak potentials of -0.180 V and -0.207 V (vs SCE). The electrode reaction was two electrons and two protons participate in the completely reversible process of adsorption control. The ErGO/CNTs membrane modified electrode has obvious catalytic and sensitizing effects on the redox of cryptotanshinone. Differential pulse voltammetry (DPV) is used to investigate the relationship between oxidation peak current and cryptotanshinone concentration. It is found that the oxidation current of cryptotanshinone is linear with its concentration in the range of 2.7 × 10 -8 ~1.3 × 10 -5 mol/L and the determination limit is 1.0 × 10 -8 mol/L, which can realize the electrochemical detection of cryptotanshinone in the drug.
{"title":"A sensitive electrochemical sensor for cryptotanshinone based on electrochemical reduced graphene oxide and carbon nanotube composite film modified glassy carbon electrode","authors":"Hui Liu, Huaize Han, Meilin Liu, Yong Zhao","doi":"10.56042/ijca.v59i12.31994","DOIUrl":"https://doi.org/10.56042/ijca.v59i12.31994","url":null,"abstract":"The electrodeposition of reduced graphene oxide and carbon nanotube (ErGO/CNTs) composite film modified electrode has been fabricated by electrochemical reduction of graphene oxide (GO) and MWNTs composite film coated on the surface of glassy carbon electrode (GCE). The results show that in 0.2 mol/L NaAc-HAc (pH= 4.5) buffer solution, cryptotanshinone produced a pair of sensitive redox peaks with peak potentials of -0.180 V and -0.207 V (vs SCE). The electrode reaction was two electrons and two protons participate in the completely reversible process of adsorption control. The ErGO/CNTs membrane modified electrode has obvious catalytic and sensitizing effects on the redox of cryptotanshinone. Differential pulse voltammetry (DPV) is used to investigate the relationship between oxidation peak current and cryptotanshinone concentration. It is found that the oxidation current of cryptotanshinone is linear with its concentration in the range of 2.7 × 10 -8 ~1.3 × 10 -5 mol/L and the determination limit is 1.0 × 10 -8 mol/L, which can realize the electrochemical detection of cryptotanshinone in the drug.","PeriodicalId":54992,"journal":{"name":"Indian Journal of Chemistry Section A-Inorganic Bio-Inorganic Physical Theoretical & Analytical Chemistry","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2020-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89797219","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-12-16DOI: 10.56042/ijca.v59i12.29642
Soumya R Thakur, R. Behura, S. Behera, Rajesh B Sayala, Ramakrishna D Arun K Barick, B. R. Jali
The binding and sensing abilities of pyrimidine based fluorescence chemosensor L towards different anions such as F - , Cl - , Br - , I - , NO 3 - , ClO 4 - , H 2 PO 4 - and HSO 4 - have been examined by fluorescence spectroscopy in DMSO-H 2 O (7: 3, v/v). Upon successive addition of various anions to DMSO-H 2 O solutions of L ; quenching in emission fluorescence is observed at 480 nm. Analysis of fluorescence emission changes suggested the formation of 1:1 complex of L with the anions. From the fluorescence binding constant data, it is found that L form strong complexes with F - and HSO 4- ions through H-bonding interactions. The selective response of F - over other halides and HSO 4- amongst other oxo-anions towards L may be explained on the basis of photo-induced electron transfer process.
{"title":"Selective detection of fluoride and hydrogen sulfate anions by pyrimidine-based fluorescence chemosensor","authors":"Soumya R Thakur, R. Behura, S. Behera, Rajesh B Sayala, Ramakrishna D Arun K Barick, B. R. Jali","doi":"10.56042/ijca.v59i12.29642","DOIUrl":"https://doi.org/10.56042/ijca.v59i12.29642","url":null,"abstract":"The binding and sensing abilities of pyrimidine based fluorescence chemosensor L towards different anions such as F - , Cl - , Br - , I - , NO 3 - , ClO 4 - , H 2 PO 4 - and HSO 4 - have been examined by fluorescence spectroscopy in DMSO-H 2 O (7: 3, v/v). Upon successive addition of various anions to DMSO-H 2 O solutions of L ; quenching in emission fluorescence is observed at 480 nm. Analysis of fluorescence emission changes suggested the formation of 1:1 complex of L with the anions. From the fluorescence binding constant data, it is found that L form strong complexes with F - and HSO 4- ions through H-bonding interactions. The selective response of F - over other halides and HSO 4- amongst other oxo-anions towards L may be explained on the basis of photo-induced electron transfer process.","PeriodicalId":54992,"journal":{"name":"Indian Journal of Chemistry Section A-Inorganic Bio-Inorganic Physical Theoretical & Analytical Chemistry","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2020-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75164880","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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