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论文类型： 会议论文

发表时间： 2006-07-01

页面范围： 1

关键字： 荧光传感器;Cd;等吸收点;荧光团;电子受体;电子给体;共轭体系;荧光量子产率;消光系数;荧光光谱;

摘要： The internal charge transfer (ICT) mechanism has been widely exploited for metal ions sensing due to the strongpoint of quantitative detection. When a fluorophore contains an electron-donating group (often an amino group) conjugating to an electron-withdrawing group, it undergoes ICT from the donor to the acceptor upon excitation. Bearing this in mind, we designed and synthesized 1, a new fluorescent sensor with high sensitivity and selectivity for Cd2+ over other metal ions, particularly without the interference of Zn2+. We chose boradiazaindacene (BODIPY) as the fluorophore because it absorbs and emits in the visible region with high quantum yield, large extinction coefficient good photostability.8 We slightly modify the well known Zn2+ and Cd2+ selective chelator di(2-picolyl)amine to give the N,N-bis-(pyridin-2-ylmethyl)- benzenamine as the receptor. Introduction of vinyl group between the receptor and BODIPY fluorophore can not only bridge the ICT process but also induce the red-shift of the fluorescence...