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16-16 双子表面活性剂对组氨酸与茚三酮反应速率常数的催化影响。

Catalytic influence of 16--16 gemini surfactants on the rate constant of histidine and ninhydrin.

作者信息

Kumar Dileep, Rub Malik Abdul

机构信息

Division of Computational Physics, Institute for Computational Science, Ton Duc Thang University, Ho Chi Minh City, Vietnam.

Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City, Vietnam.

出版信息

R Soc Open Sci. 2020 Feb 5;7(2):191648. doi: 10.1098/rsos.191648. eCollection 2020 Feb.

DOI:10.1098/rsos.191648
PMID:32257328
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7062088/
Abstract

The present paper reports the catalytic influence of 16--16 (spacer () = 4, 5, 6) gemini surfactants on the rate constant of histidine and ninhydrin at 343 K and pH 5.0 using the spectrophotometric technique. The effect of varying amounts of geminis was made on the rate constant of histidine and ninhydrin keeping other constituents constant. Characteristics of the rate constant ( ) versus [gemini] depict the effect of surfactants on the rate constant. A systematic explanation about the effect of surfactants is revealed and discussed in the text. The influence of different parameters that includes [reactants], temperature and pH has also been performed on the study. In order to determine the critical micelle concentration (cmc) of pure surfactants and their solution mixtures, conductivity measurement was employed. By using the Eyring equation, activation parameters at different temperatures have been obtained. The resultant data of versus [gemini] plot were rationalized with the pseudo-phase model of micelles.

摘要

本文采用分光光度技术，报道了16 - 16（间隔基（）= 4、5、6） Gemini表面活性剂在343 K和pH 5.0条件下对组氨酸与茚三酮反应速率常数的催化影响。在其他成分保持不变的情况下，改变Gemini表面活性剂的用量，研究其对组氨酸与茚三酮反应速率常数的影响。反应速率常数（）与[Gemini]的关系曲线描述了表面活性剂对反应速率常数的影响。文中对表面活性剂的影响进行了系统的解释和讨论。还研究了包括[反应物]、温度和pH在内的不同参数的影响。为了测定纯表面活性剂及其溶液混合物的临界胶束浓度（cmc），采用了电导率测量法。利用Eyring方程，获得了不同温度下的活化参数。通过胶束的假相模型对与[Gemini]关系图的实验数据进行了合理分析。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8d8a/7062088/92619b21b100/rsos191648-g5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8d8a/7062088/72ffa860c230/rsos191648-g1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8d8a/7062088/4d6621d7bd0b/rsos191648-g2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8d8a/7062088/45122182840d/rsos191648-g3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8d8a/7062088/68d31af2fbb4/rsos191648-g4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8d8a/7062088/92619b21b100/rsos191648-g5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8d8a/7062088/72ffa860c230/rsos191648-g1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8d8a/7062088/4d6621d7bd0b/rsos191648-g2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8d8a/7062088/45122182840d/rsos191648-g3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8d8a/7062088/68d31af2fbb4/rsos191648-g4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8d8a/7062088/92619b21b100/rsos191648-g5.jpg

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