Jun Yan1, Long Fan1, Jing-Can Qin1, Chao-Rui Li1, Zheng-Yin Yang2. 1. College of Chemistry and Chemical Engineering, State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, 730000, People's Republic of China. 2. College of Chemistry and Chemical Engineering, State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, 730000, People's Republic of China. yangzy@lzu.edu.cn.
Abstract
A new chromone Schiff-base fluorescent probe 7'-methoxychromone-3'-methylidene-1,2,4-triazole-3-imine (L) was designed and synthesized for selective recognition Cd(2+). With the fluorescence titration and the ESI-MS data, we reach the conclusion that the binding mode of the ligand-metal (L-Cd (2+) ) complex is 1:1. The sensor showed a strong fluorescence enhancement in ethanol system of Cd(2+) (excitation 409 nm and emission 462 nm) and the sensing mechanism based on the fact that C=N isomerization can be used to explain this phenomenon.
A new chromone Schiff-base fluorescent probe n class="Chemical">7'-methoxychromone-3'-methylidene-1,2,4-triazole-3-imine (L) was designed and synthesized for selective recognition Cd(2+). With the fluorescence titration and the ESI-MS data, we reach the conclusion that the binding mode of the ligand-metal (L-Cd (2+) ) complex is 1:1. The sensor showed a strong fluorescence enhancement in ethanol system of Cd(2+) (excitation 409 nm and emission 462 nm) and the sensing mechanism based on the fact that C=N isomerization can be used to explain this phenomenon.
Authors: Marta Mameli; M Carla Aragoni; Massimiliano Arca; Marta Atzori; Andrea Bencini; Carla Bazzicalupi; Alexander J Blake; Claudia Caltagirone; Francesco A Devillanova; Alessandra Garau; Michael B Hursthouse; Francesco Isaia; Vito Lippolis; Barbara Valtancoli Journal: Inorg Chem Date: 2009-10-05 Impact factor: 5.165