Three Rhodamine-Based “Off–On” Chemosensors with High Selectivity and Sensitivity for Fe³⁺ Imaging in Living Cells

Abstract

Three new rhodamine-based probes Y1-Y3 were synthesized as "off-on" chemosensors for Fe(3+) imaging in living cells. The recognizing behaviors were investigated both experimentally and computationally. The crystal structure of the complex Y3-Fe(3+) revealed that Fe(3+) preferred to coordinate with the N atom of benzothiazole moiety rather than the O atom of carboxyl group.

Highly selective detection of Hg2+ and MeHgI by di-pyridin-2-yl-[4-(2-pyridin-4-yl-vinyl)-phenyl]-amine and its zinc coordination polymer

“…[28][29][30][31][32][33][34][35] Although a variety of fluorescent ratiometric sensors for Cu 2+ , Fe 3+ , etc. have been documented, [36][37][38][39][40][41][42] only a few ratiometric Hg 2+ probes have been reported to date. [43][44][45][46] Therefore it remains a challenge to develop a highly effective fluorescent Hg 2+ sensor.…”

Polyethyleneimine-templated copper nanoclusters via ascorbic acid reduction approach as ferric ion sensor

“…At present, a variety of sensor platforms for the detection of Fe 3+ ions have been developed by using gold nanoparticles, carbon nanoparticles, organic dye molecules, and gold nanoclusters, etc. [23,[25][26][27][28][29]. However, up to now, none explored the fluorescent CuNCs probes for Fe 3+ sensing.…”

Solvent-dependent turn-on probe for dual monitoring of Ag+ and Zn2+ in living biological samples

“…Calculations at the TDDFT [38][39][40][41] level based on the optimized structures of the ground S 0 state and the first excited S 1 state were performed to investigate the absorption and fluorescent emission of the ring-opened compounds 2 and 3 for verification of the proposed mechanism (Fig. 3).…”