Solvent controlled sugar–rhodamine fluorescence sensor for Cu2+ detection

Abstract

A ''turn-on'' fluorescence probe for Cu 2+ detection has been reported according to a Cu 2+ triggered spirolactam ring-opening reaction. The probe is a double-responsive fluorescent and colorimetric Cu 2+ -specific sensor in aqueous solution containing 20% of acetonitrile with high selectivity and excellent sensitivity (limit of detection is 12 mg L À1 ). Furthermore, the significant color changes visible to the naked eye at the concentration of 3 mM (ca. 0.20 mg L À1 ) are about ten times lower than the WHO (World Health Organization) recommended level (2.0 mg L À1) for Cu 2+ ions in drinking water.

A water soluble and fast response fluorescent turn-on copper complex probe for H2S detection in zebra fish

“…Zeng and Bai have utilized a similar approach in the design of their 8-hydroxyquinoline sulfide probe, which combines a fluorescein with a pendant 8-hydroxyquinoline ligand for copper binding [22]. Even though many reports are available for metal complex based H 2 S sensors, most of them have drawbacks including poor detection limit [23,24], longer response time [25], tedious synthetic procedure [26], use of organic solvent [27] or higher amount of co-solvent with water [28]. In addition, only few Cu(II) complex sensors can function in complete aqueous solution [29,30].…”

A uracil nitroso amine based colorimetric sensor for the detection of Cu2+ions from aqueous environment and its practical applications

“…[18][19][20][21] By contrast, nakedeye detection methods permit detection of the target analyte at the micro/submicromolar levels without any need for expensive/sophisticated instrumentation. 22,23 Therefore, given the importance of and the hazardous roles played by copper, we were encouraged to develop a colorimetric sensor with naked-eye capability for detecting Cu 2+ from pure aqueous media.…”

A Highly Selective and Sensitive Probe for Cu2+ Based on Rhodamine-Pyridazine Conjugate and its Application

“…9). Thus, based on the 1:2 binding mode and the nonreversible behavior between L and Cu 2+ , and according to our knowledge [24,25,[30][31][32], we broached a conceivable mechanism of Cu 2+ complex with L (Scheme 2). A directly evidence was obtained by comparing the HR-MS of L (Fig.…”