Development of a reliable analytical method for the precise extractive spectrophotometric determination of osmium(VIII) with 2-nitrobenzaldehydethiocarbohydrazone: Analysis of alloys and real sample
作者:Sunil B. Zanje、Arjun N. Kokare、Vishal J. Suryavanshi、Duryodhan P. Waghmode、Sunil S. Joshi、Mansing A. Anuse
DOI:10.1016/j.saa.2016.06.051
日期:2016.12
as evaluated by Ringbom's plot. Molar absorptivity and Sandell's sensitivity of osmium(VIII)-2NBATCH complex in chloroform is 8.94 × 103 L mol− 1 cm− 1 and 0.021 μg cm− 2, respectively. The composition of osmium(VIII)-2NBATCH complex was 1:2 investigated from Job's method of continuous variation, Mole ratio method and slope ratio method. The interference of diverse ions was studied and masking agents
所提出的方法证明that(VIII)在室温下与0.8 mol L -1 HCl的2-NBATCH形成络合物。将形成的复合物在10 mL氯仿中萃取5分钟,达到平衡时间。用试剂空白在440 nm处测量了红色络合物的吸光度。根据林伯氏图评估,was定律在5–25μgmL -1范围内,最佳浓度范围是10–20μgmL -1的((VIII)。VIII(VIII)-2NBATCH络合物在氯仿中的摩尔吸收率和Sandell敏感性为8.94×10 3 L mol -1 cm -1和0.021μgcm -2, 分别。Job(VIII)-2NBATCH配合物的组成按Job连续变化法,摩尔比法和斜率比法测得。研究了各种离子的干扰,并在必要时使用了掩蔽剂。本方法已成功地用于测定对应于合金和真实样品的二元,三元和合成混合物中的(。通过找到五次测定的相对标准偏差为0.29%,确认了该方法的有效性。
Synthesis, physicochemical characterization, and TD–DFT calculations of monothiocarbohydrazone derivatives
作者:Gorana S. Mrđan、Gyöngyi Gy. Vastag、Dušan Đ. Škorić、Mirjana M. Radanović、Tatjana Ž. Verbić、Miloš K. Milčić、Ivana N. Stojiljković、Olivera S. Marković、Borko M. Matijević
DOI:10.1007/s11224-020-01700-y
日期:2021.6
solubility parameters were calculated. Influence of the type and position of the substituent on absorption maxima was determined with LFER (linear free-energy relationship) principles, using Hammett’s equation. Acidity constants of the synthesized compounds were theoretically calculated and experimentally determined. Moreover, the excitation of a molecule by a photon of UV–Vis light was interpreted
迄今为止研究的硫代碳腙衍生物已显示出很好的生物活性,如抗氧化、抗菌和抗癌。大多数这些化合物是双取代的衍生物,而对单硫代碳腙的研究要少得多。合成了十八种单硫代碳腙并对其进行了理化表征,以促进对其潜在生物活性的检查和在未来研究中的应用。合成衍生物的结构经核磁共振和红外光谱以及元素分析证实。对于其中一种化合物,进行了单晶 X 射线衍射分析。LSER 原理使用 Catalan 模型解释了特定和非特定的分子相互作用。有关所呈现的相互作用的优势和影响的其他信息,计算了与 Hansen 溶解度参数的相关性。取代基的类型和位置对吸收最大值的影响通过 LFER(线性自由能关系)原理使用哈米特方程确定。合成化合物的酸度常数通过理论计算和实验确定。此外,紫外-可见光光子对分子的激发通过紫外吸收带的时间相关密度泛函理论(TD-DFT)计算来解释,分子内电荷转移(ICT)通过电荷转移的计算来量化距离(DCT)。取代基的类型和位置对吸收最大值的影响通过