Turn-On Fluorescent Chemosensor for Hg2+ Based on Multivalent Rhodamine Ligands

International Journal of Molecular Sciences

Xuemei Wang¹  Mudassir Iqbal¹  Jurriaan Huskens¹ 

[1] Laboratory of Molecular Nanofabrication, MESA+ Institute for Nanotechnology, University of Twente, Enschede 7500 AE, The Netherlands; E-Mails:

关键词: rhodamine;    mercury;    chemosensor;    fluorescence;   

DOI  :  10.3390/ijms131216822

来源: mdpi

【 摘 要 】

Rhodamine-based fluorescent chemosensors 1 and 2 exhibit selective fluorescence enhancement to Fe³⁺ and Hg²⁺ over other metal ions at 580 nm in CH₃CN/H₂O (3/1, v/v) solution. Bis(rhodamine) chemosensor 1, under optimized conditions (CH₃CN/HEPES buffer (0.02 M, pH = 7.0) (95/5, v/v)), shows a high selectivity and sensitivity to Hg²⁺, with a linear working range of 0–50 μM, a wide pH span of 4–10, and a detection limit of 0.4 μM Hg²⁺.

【 授权许可】

CC BY   
© 2012 by the authors; licensee Molecular Diversity Preservation International, Basel, Switzerland.