Rasayan Journal of Chemistry最新文献_第2页

EVALUATION OF CORROSION PROTECTION CAPACITY OF DOPED PPY FILM FOR STAINLESS STEEL IN AN ACIDIC MEDIUM 酸性介质中掺杂ppy膜对不锈钢的防腐性能评价

Rasayan Journal of Chemistry Pub Date : 2023-01-01 DOI: 10.31788/rjc.2023.1628208

Monika, G. Rani, Naveen Kumar, R. Ahlawat

{"title":"EVALUATION OF CORROSION PROTECTION CAPACITY OF DOPED PPY FILM FOR STAINLESS STEEL IN AN ACIDIC MEDIUM","authors":"Monika, G. Rani, Naveen Kumar, R. Ahlawat","doi":"10.31788/rjc.2023.1628208","DOIUrl":"https://doi.org/10.31788/rjc.2023.1628208","url":null,"abstract":"Advanced corrosion protection methods include covering stainless steel surfaces with conductive polymer-based coatings. Polypyrrole and polypyrrole composites of tungstate of different concentrations were deposited on stainless steel-304 using cyclic voltammetry and their elemental analysis was verified by EDX analysis. EIS and potentiodynamic polarization analysis show that the corrosion protection efficiency (CPE) of polypyrrole composites is higher than polypyrrole coating. The reduction in corrosion rate due to the inhibitory action of tungstate through the physical barrier and anodic protection mechanism was validated by greater Rct and lower Icorr values of polypyrrole composites. In the composites, with increasing the concentration of tungstate in polypyrrole from 5% to 15%, CPE also increases, as polypyrrole composites are more able to shift the corrosion potential of stainless steels towards the passive zone and form a new nonporous passive oxide film on the surface. With a 15% concentration coating, the highest CPE of 93% and the lowest corrosion rate of 130 mmpy were obtained, indicating that the entire stainless steel active surface area is completely absorbed and that no active sites exit for adsorption at this concentration. The synthesized polypyrrole composites with a 15% concentration offer excellent corrosion protection prospects.","PeriodicalId":21063,"journal":{"name":"Rasayan Journal of Chemistry","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69411322","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 AND CHARACTERIZATION OF BENZOXAZINE: URETHANE COPOLYMER FROM VANILLIN WITH ADAMANTANE SIDE CHAIN AND ITS ANTICORROSIVE COATING ON MILD STEEL 含金刚烷侧链香兰素-氨基甲酸乙酯共聚物的合成与表征及其在低碳钢上的防腐涂层

Rasayan Journal of Chemistry Pub Date : 2023-01-01 DOI: 10.31788/rjc.2023.1628362

K. Jayanthi, M. Sivaraju

引用次数: 0

COORDINATION BEHAVIOUR AND COMPUTATIONAL STUDIES OF 3-FORMYL CHROMONE N(4)-METHYL-N(4)- PHENYLTHIOSEMICARBAZONE AND ITS TRANSITION METAL COMPLEXES 3-甲酰基色素n(4)-甲基- n(4)-苯基硫代氨基脲及其过渡金属配合物的配位行为和计算研究

Rasayan Journal of Chemistry Pub Date : 2023-01-01 DOI: 10.31788/rjc.2023.1638352

K. Sangeetha, K. K. Aravindakshan

引用次数: 0

PHOTOCATALYTIC DEGRADATION OF RHODAMINE B UNDER UV USING DOUBLE-LAYER ZnO: Fe THIN FILM 双层ZnO: Fe薄膜在紫外光下光催化降解罗丹明B

Rasayan Journal of Chemistry Pub Date : 2023-01-01 DOI: 10.31788/rjc.2023.1617061

H. Sutanto, I. Alkian, Ulfa Hasanah, E. Hidayanto, I. Marhaendrajaya, Priyono

引用次数: 0

DETERMINATION OF TOTAL PHYTOCHEMICAL COMPOUNDS FROM ETHANOL EXTRACT NANGKA (Artocarpus heterophyllus Lam.) LEAVES AND ANTIOXIDANT ACTIVITY FROM NORTH SUMATERA, INDONESIA 南卡乙醇提取物中总植物化学成分的测定印度尼西亚北苏门答腊叶及其抗氧化活性

Rasayan Journal of Chemistry Pub Date : 2023-01-01 DOI: 10.31788/rjc.2023.1618113

Suharni P. Sinaga, R. Situmorang, N. Singarimbun, W. Lestari, K. Gurning

{"title":"DETERMINATION OF TOTAL PHYTOCHEMICAL COMPOUNDS FROM ETHANOL EXTRACT NANGKA (Artocarpus heterophyllus Lam.) LEAVES AND ANTIOXIDANT ACTIVITY FROM NORTH SUMATERA, INDONESIA","authors":"Suharni P. Sinaga, R. Situmorang, N. Singarimbun, W. Lestari, K. Gurning","doi":"10.31788/rjc.2023.1618113","DOIUrl":"https://doi.org/10.31788/rjc.2023.1618113","url":null,"abstract":"Nangka (Artocarpus heterophyllus Lam.) has various nutritional contents and abundant bioactive compounds. Potential bioactive compounds including phenolic and flavonoid categorized as antioxidants. This study aimed to determine the levels of phenolics and flavonoids and to test their potential activity as antioxidants from the ethanol extract of nangka leaves. The extraction process used ethanol by maceration method, colorimetric determination of phenolic, flavonoid, and tannins content, and determination of antioxidant activity by 2,2-dipicryl -1-hydrazil (DPPH) method using UV-Vis spectrophotometry. Determination of phenolic content was measured at a maximum wavelength of 765 nm with gallic acid as the standard, flavonoid content was measured at a maximum wavelength of 431 nm with quercetin as standard, tannins content was measured at a maximum wavelength of 745 nm with tannic acid as standard and the determination of antioxidant activity at a maximum wavelength of 517 nm with positive control of vitamin C. The results showed that the ethanolic extract of nangka leaves has phenolic content with a total phenolic content of 27.654±0.054 mg GAE/g d.w ethanolic, flavonoid content of 2.978 ±0.192 mg QE/g d.w ethanolic, tannins content 0.46 ± 0.017 mg TAE/g d.w ethanolic extract and antioxidant activity (IC50) 25.561±0.055 ppm which categorized as a very strong antioxidant","PeriodicalId":21063,"journal":{"name":"Rasayan Journal of Chemistry","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69410456","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

MICROWAVE FACILITATED THE SYNTHESIS OF ISOPROPYL MYRISTATE AND PALMITATE USING HETEROGENEOUS CATALYST 微波催化异相催化合成肉豆蔻酸异丙酯和棕榈酸酯

Rasayan Journal of Chemistry Pub Date : 2023-01-01 DOI: 10.31788/rjc.2023.1618078

J. Tarigan, D. Barus, G. Brahmana, D. A. Hulu, W.S. Sembiring, S. Perangin-angin, E. K. Sitepu

引用次数: 1

STUDY OF MOLECULAR INTERACTIONS OF SUBSTITUTED 2-OXO-2-H-CHROMENE-3-CARBOHYDRAZIDE DERIVATIVES IN BINARY SOLVENTS USING ULTRASONIC INTERFEROMETER 用超声干涉仪研究取代的2-氧-2- h -铬-3-碳肼衍生物在二元溶剂中的分子相互作用

Rasayan Journal of Chemistry Pub Date : 2023-01-01 DOI: 10.31788/rjc.2023.1618170

Pandurang Choudhari, P. V. Raut

引用次数: 0

IN VITRO ANTI-PROLIFERATIVE ACTIVITY OF NOVEL ANALOGUES OF(E)-2-BENZYLIDENE-N-(3-(3-OXO-2,3- DIHYDRO-4H-BENZO[B][1,4]OXAZIN-4-YL)PROPYL) HYDRAZINE-1-CARBOTHIOAMIDE 新型(e)-2-苄基- n -(3-(3-氧-2,3-二氢-4- h -苯并[b][1,4]恶嗪-4-基)丙基)肼-1-碳硫酰胺类似物的体外抗增殖活性

Rasayan Journal of Chemistry Pub Date : 2023-01-01 DOI: 10.31788/rjc.2023.1628154

Palla Sai Lakshmi, P. Shankaraiah

引用次数: 0

STABILITY INDICATING ISOCRATIC RP-HPLC AND SECOND DERIVATIVE UV SPECTROSCOPIC METHODS FOR SIMULTANEOUS DETERMINATION OF REMOGLIFLOZIN ETABONATE AND VILDAGLIPTIN HYDROCHLORIDE 稳定性表明等密度反相高效液相色谱法和二阶导数紫外光谱法同时测定盐酸维格列汀和雷莫列净

Rasayan Journal of Chemistry Pub Date : 2023-01-01 DOI: 10.31788/rjc.2023.1628212

J. Panchal, B. Dhaduk, J. Dhalani

{"title":"STABILITY INDICATING ISOCRATIC RP-HPLC AND SECOND DERIVATIVE UV SPECTROSCOPIC METHODS FOR SIMULTANEOUS DETERMINATION OF REMOGLIFLOZIN ETABONATE AND VILDAGLIPTIN HYDROCHLORIDE","authors":"J. Panchal, B. Dhaduk, J. Dhalani","doi":"10.31788/rjc.2023.1628212","DOIUrl":"https://doi.org/10.31788/rjc.2023.1628212","url":null,"abstract":"Remogliflozin and Vildagliptin are the latest drug combination in order to treat type 2 diabetes. The present work describes a comparative study of 2nd-ordered derivative UV and isocratic stability indicating RP-HPLC methods for simultaneous determination of Remogliflozin and Vildagliptin in the drug and its formulation. The HPLC method was established with a C18 column and the mobile phase with Buffer (pH-6.50): Acetonitrile: Methanol ratio of 55:44:1, at 1.2 ml/min flow and wavelength of 210 nm. The UV spectrophotometric method works on spectrophotometry with 2nd order derivative spectra(2D) using a zero-line cross method. The absorbance determination was performed at 246.0 nm for REM and at 219 .6 nm for VIL. The methods were validated for Linearity, Precision, Recovery, Robustness, and Forced degradation as per ICH-Q2(R1). The linear range was established in the range of 4-80 ppm for REM and 2-40 ppm for VIL for the UV method and 2-200 ppm for REM and 1-100 ppm for VIL for the HPLC method with regression coefficient ≥0.990. The accuracy was 99.37% & 99.62% for UV and 100.98 & 100.65 for the HPLC method for REM and VIL respectively. The proposed methods have been effectively used for the quantification of REM and VIL in API mixture and formulation dosage forms. Both methods are economical, fast, simple, and accurate which can be easily adopted for laboratory use.","PeriodicalId":21063,"journal":{"name":"Rasayan Journal of Chemistry","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69411330","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

A PHOTOCURABLE METHOD FOR COPPER(II) OXIDEDOPED POLYANILINE CONDUCTING POLYMER MEMBRANE SYNTHESIS 一种光固化的铜(ii)氧化掺杂聚苯胺导电聚合物膜合成方法

Rasayan Journal of Chemistry Pub Date : 2023-01-01 DOI: 10.31788/rjc.2023.1638301

S. Wulandari, U. Alizar, U.K. Nizar, I. M. Isa, A.B. Norlaili, Yulkifli, Ramli, L. Tan

{"title":"A PHOTOCURABLE METHOD FOR COPPER(II) OXIDEDOPED POLYANILINE CONDUCTING POLYMER MEMBRANE SYNTHESIS","authors":"S. Wulandari, U. Alizar, U.K. Nizar, I. M. Isa, A.B. Norlaili, Yulkifli, Ramli, L. Tan","doi":"10.31788/rjc.2023.1638301","DOIUrl":"https://doi.org/10.31788/rjc.2023.1638301","url":null,"abstract":"The development of conductive polyaniline (PANI) membrane doped with copper(II) oxide (CuO) by means of the photopolymerization method has been successfully carried out. The photocurable PANI polymeric material was synthesized by mixing 0.011 g of aniline monomer with 0.016 g of ethylene glycol dimethacrylate (EGDMA) crosslinker, 0.021 g of dimethoxy phenylacetophenone (DMPP) photoinitiator and 0.026 g of CuO dopant. The electrical conductivity analysis showed that the as-synthesized CuO-doped PANI (PANI/CuO) film possessed an optimum electrical conductivity value of 39.81×10 -3 S cm -1 at the dopant loading of 0.011 g CuO. Chemical elucidation by using Fourier-transform infrared spectroscopy (FTIR) revealed that the PANI/CuO conducting material with several main functional groups e.g., N-H, C-H, C-N, C=C, C=N, C-O and C=O chemical bonds were identified. Meanwhile, optical characterization of the resulting PANI/CuO membrane by using UV–vis diffuse reflectance spectrophotometer (DR/UV-vis) showed that PANI underwent electron transition π-π* (C=C) at a wavelength of 324 nm, and band gap values of 2.35 eV, 1.33 eV, 1.39 eV, 1.42 eV, 1.42 eV, and 1.50 eV for PANI, PANI/CuO 0.011 g, PANI/CuO 0.016 g, PANI/CuO 0.021 g, PANI/CuO 0.026 g, and CuO, respectively.","PeriodicalId":21063,"journal":{"name":"Rasayan Journal of Chemistry","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69412148","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