Department of Chemistry, International Research Centre, Centre for Supramolecular Chemistry, Kalasalingam Academy of Research and Education (KARE), Anand Nagar, Krishnankoil, Srivilliputtur, Tamil Nadu 626 126, India.
Department of Chemistry, International Research Centre, Centre for Supramolecular Chemistry, Kalasalingam Academy of Research and Education (KARE), Anand Nagar, Krishnankoil, Srivilliputtur, Tamil Nadu 626 126, India.
Spectrochim Acta A Mol Biomol Spectrosc. 2020 Jun 15;234:118207. doi: 10.1016/j.saa.2020.118207. Epub 2020 Mar 3.
We are reporting a simple, easy to prepare, and conformation switchable first molecular phototropic system L, "(E)-2-(2,4-dinitrophenyl)-1-((pyren-8-yl)methylene)hydrazine, for cyanide harvesting. This molecular phototropic system behaves as a molecular sunflower in which the conformation of this molecular sunflower can be altered in response to the sunlight. This molecular flower can sense and bind the cyanide anion colorimetrically through its transition state. Further, upon exposure of this transition state cyanide complex 1, under sunlight, this system is capable to release the bound cyanide via -C=N- free rotation to reach its lower energy stable conformation. Similar behaviors were observed for acetate and fluoride with L. The strength of the phototropic system L towards cyanide, acetate and fluoride is found to be 4.5 × 10, 1.53 × 10 and 6.09 × 10 M.
我们报道了一种简单、易于制备且构象可切换的第一个分子光致旋转系统 L，“(E)-2-(2,4-二硝基苯基)-1-((芘-8-基)亚甲基)腙，用于氰化物的捕获。这种分子光致旋转系统表现为分子向日葵，其构象可以响应阳光而改变。这种分子花可以通过其过渡态对氰化物阴离子进行比色检测和结合。此外，在过渡态氰化物配合物 1 暴露于阳光下时，该系统能够通过 -C=N- 自由旋转释放结合的氰化物，以达到其较低能量的稳定构象。对于 L，类似的行为也在醋酸盐和氟化物中观察到。发现光致旋转系统 L 对氰化物、醋酸盐和氟化物的强度分别为 4.5×10、1.53×10 和 6.09×10 M。
