Simple Bisthiocarbonohydrazones as Sensitive, Selective, Colorimetric, and Switch-On Fluorescent Chemosensors for Fluoride Anions
作者:Feng Han、Yuhui Bao、Zhigang Yang、Thomas M. Fyles、Jianzhang Zhao、Xiaojun Peng、Jiangli Fan、Yunkou Wu、Shiguo Sun
DOI:10.1002/chem.200600904
日期:2007.3.26
Bis-thiocarbono-hydrazones are found to be a class of sensitive, selective, ratiometric, and colorimetric chemosensors for anions such as fluoride (F(-)) or acetate (Ac(-)). The sensitivities, or the binding constants of the sensors with anions, were found to be strongly dependent on the substituents appended on the pi-conjugation framework, the delocalization bridge CH==N, the aromatic moiety, and
已发现双硫代碳氢hydr是一类对阴离子(例如氟离子(F(-))或乙酸根离子(Ac(-)))敏感,选择性,比率和比色的化学传感器。发现传感器的灵敏度或与阴离子的结合常数在很大程度上取决于附加在pi共轭骨架上的取代基,离域桥CH == N,芳族部分和C =中的杂原子=传感器的X组(X = O,S)。单晶结构和(1)H NMR滴定分析表明--CH == N-部分是氢键供体,建议在存在F的情况下为传感器形成一个额外的CHF氢键(-)。带有蒽基的传感器被证明是用于F(-)和Ac(-)的开启式荧光化学传感器。乙腈(MeCN)中具有硝基苯基取代基的传感器对F(-)的识别可耐受MeOH(MeCN / MeOH = 10:1,v / v)和水(MeCN / H(2)O = 30:1, v / v);在这些溶剂比率下,传感器-F(-)络合物溶液在最大吸收波长下的吸收强度被衰减至纯MeCN中原始值的一半。