A colorimetric and turn-on fluorescent chemosensor for Al (III) based on a chromone Schiff-base

L Fan, T Li, B Wang, Z Yang, C Liu

Index: Fan, Long; Li, Tian-Rong; Wang, Bao-Dui; Yang, Zheng-Yin; Liu, Chun-Jiao Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy, 2014 , vol. 118, p. 760 - 764

Full Text: HTML

Citation Number: 21

Abstract

Abstract A simple Schiff-base receptor 7-methoxychromone-3-carbaldehyde-(pyridylformyl) hydrazone (MCNH) was prepared. It exhibits an “off–on-type” mode with high sensitivity in the presence of Al 3+. This compound could be used as Al 3+ probe in ethanol and it features visible light excitation (433 nm) and emission (503 nm) profiles. Upon binding of Al 3+, a significant fluorescence enhancement with a turn-on ratio over 800-fold was ...