Synthesis, characterization and ion recognition studies of lower rim 1,3-di{rhodamine} conjugate of calix[4]arene

Journal of Chemical Sciences

Chebrolu Pulla Rao1¹  Jayaraman Dessingou¹  Jugun Prakash Chinta¹ 

[1] Bioinorganic Laboratory, Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400 076, India$$

关键词: Rhodamine conjugate of calix[4]arene;    ratiometric sensor for Hg2+;    ion recognition;    emission and absorption titrations.;   

DOI  :  

来源: Indian Academy of Sciences

【 摘 要 】

An amido-linked rhodamine conjugate of calix[4]arene, L has been synthesized and characterized. Metal ion recognition properties of L have been studied by emission and absorption techniques with 14 different metal ions including the transition ones. Results show that, L exhibits ratiometric emission intensity towards Hg2+, Fe2+, Fe3+, Cu2+, Pb2+ and Zn2+. Composition of the complex formed in the solution has been found to be 1:2 (L:M𝑛+), based on the Job’s plot. The L can also act as a chemosensor for Hg2+ through naked eye detection. Fluorescence quenching observed at 485 nm follows an order, Hg2+>>Fe3+∼Cu2+>Zn2+>Pb2+>Ca2+, while the enhancement observed at 580 nm follows, Hg2+>>Fe2+∼Pb2+>Zn2+. Mode of interaction of M𝑛+ with L is by the ring opening of spirolactam moiety.

【 授权许可】

Unknown