International Research Centre, Centre for Supramolecular Chemistry, Kalasalingam University, Kalasalingam Academy of Research and Education, Anand Nagar Krishnankoil, Srivilliputtur, Tamil Nadu, 626 126, India.
Department of Chemistry, Kalasalingam University, Kalasalingam Academy of Research and Education , Anand Nagar, Krishnankoil, Srivilliputtur, Tamil Nadu, 626 126, India.
J Fluoresc. 2020 Mar;30(2):291-300. doi: 10.1007/s10895-020-02490-6. Epub 2020 Jan 29.
Investigation on strength of the tris(2-amino ethyl) amine and tris (3-amino propyl) amine backboned tripodal receptors, L and L (incorporated with tripodal Cν frame, thio urea-amide linkage and π-hole assisting functionality) which are premeditated to explore the prospect for a particular anion recognition are studied. UV-Vis, H- NMR, and IR spectroscopy studies indicates that both the receptors sensing azide anion, colorimetrically and binds azide anion stronger than any other anions such as acetate, and cyanide. In particular the receptor L shows the highest binding strength towards azide anion. To the best of our knowledge this is the first receptor showing highest binding ability with azide anion. We used Molecular Electrostatic Potential Surface analyses to support our spectroscopic findings. The association constant and limits of detection for receptor L with azide is found to be 8.4X10M and 3.16X10 M respectively. The observed highest binding strength of L with azide is, could be due to the cooperative effect of extended traditional hydrogen bonding via thiourea-amide functionality, anion-π interaction and Cν suitable framework.
研究了三（2-氨基乙基）胺和三（3-氨基丙基）胺支化三脚架受体 L 和 L 的强度，L 和 L （包含三脚架 Cν 框架、硫脲酰胺键和π-hole 辅助功能）旨在探索特殊阴离子识别的前景。UV-Vis、H-NMR 和 IR 光谱研究表明，这两种受体都能感应叠氮阴离子，比任何其他阴离子（如醋酸盐和氰化物）具有更强的比色和结合能力。特别是受体 L 对叠氮阴离子表现出最强的结合强度。据我们所知，这是第一个显示出与叠氮阴离子最强结合能力的受体。我们使用分子静电势表面分析来支持我们的光谱发现。发现受体 L 与叠氮的结合常数和检测限分别为 8.4×10^M 和 3.16×10^M。L 与叠氮的观察到的最高结合强度可能是由于通过硫脲酰胺功能的扩展传统氢键、阴离子-π 相互作用和 Cν 合适的框架的协同作用所致。
