760154-10-7Relevant academic research and scientific papers
Rhodamine-pyrene conjugated chemosensors for ratiometric detection of Hg2+ ions: Different sensing behavior between a spirolactone and a spirothiolactone
Chu, Kai-Hui,Zhou, Yi,Fang, Yuan,Wang, Li-Hong,Li, Ju-Ying,Yao, Cheng
, p. 339 - 346 (2013)
Two novel rhodamine-pyrene conjugated chemosensors were successfully designed and synthesized, which exhibited high affinity to Hg2+ ions. As ratiometric chemosensors, each displayed highly selective and sensitive colorimetric and fluorogenic dual-responses toward Hg2+. The comparison of two chemosensors indicated that the spirothiolactone containing sensor was superior to the spirolactone analog in sensing behavior when detecting Hg2+, presumably due to the thiophilic nature of mercury and the different sensing mechanisms in operation. Upon interaction with Hg 2+, the spirothiolactone showed a 1:1 stoichiometry for the Hg 2+ complex, accompanied with a weakened fluorescence resonance energy transfer (FRET) behavior. However, the spirolactone was hydrolyzed and consequently induced the monomer-excimer switch of the resulted pyrene in the presence of Hg2+ ions.
Highly sensitive and selective turn-on fluorescent probes for Cu2+ based on rhodamine B
Yuan, Ye,Sun, Shiguo,Liu, Si,Song, Xinwei,Peng, Xiaojun
, p. 5261 - 5265 (2015/07/02)
A new rhodamine B-based fluorescent probe RL for Cu2+ has been designed, synthesized, and characterized. It exhibits a very high selectivity and sensitivity for the detection of Cu2+ in CH3CN:H2O = 1:9 (v/v) buffered with Britton-Robinson (pH = 7.02), the detection limit can reach 0.739 nM, which is the lowest reported. Furthermore, the probe RL can be made into test papers to detect the cupric ions in drinking water by the naked eye. RL can also be used for imaging Cu2+ in living cells and is almost non-toxic.
