Both visual and ratiometric fluorescent sensor for Zn2+ based on spirobenzopyran platform
摘要:
A ratiometric fluorescent Zn2+ chemosensor, SPQH, based on spirobenzopyran platform, was synthesized. In aqueous HEPES 7.4 buffer solution, upon chelation with Zn(II), SPQH demonstrates high selectivity and subnanomolar sensitivity for zinc ion with 36-fold enhancement in the NIR fluorescence output. (C) 2012 Elsevier Ltd. All rights reserved.