Selective Colorimetric and “Turn-on” Fluorimetric Detection of Cyanide Using a Chemodosimeter Comprising Salicylaldehyde and Triphenylamine Groups
作者:Palas Baran Pati、Sanjio S. Zade
DOI:10.1002/ejoc.201201085
日期:2012.10.11
Chemodosimeters S1 and S2 having salicylaldehyde and triphenylamine functionalities were synthesized, and the changes in their absorption and emission properties in the presence of anions were evaluated. S1 and S2 act as selective colorimetric and fluorimetric molecular probes for sensing and signalling cyanide. The signal transduction mechanism was investigated by UV/Vis absorption, emission, and
合成了具有水杨醛和三苯胺官能团的化学剂量计 S1 和 S2,并评估了它们在阴离子存在下的吸收和发射特性的变化。S1和S2充当用于感测和信号氰化物的选择性比色和荧光分子探针。通过紫外/可见光吸收、发射和核磁共振光谱研究了信号转导机制,并得到了 DFT 计算的支持。受体和氰化物离子之间的相互作用导致颜色和发射强度的巨大变化。荧光强度的显着增强是由于氰化物更好的亲核性以及剂量计中水杨醛基团的苯酚质子通过分子内氢键进行羰基活化引起的。从带负电荷的醌型片段到三芳基胺基团的分子内电荷转移负责比色响应。发现 S1 和 S2 的检测限分别为 1.55 和 0.72 μM,荧光增强因子为 350 和 25。