Highly Sensitive and Selective Colorimetric and Off-On Fluorescent Reversible Chemosensors for Al3+ Based on the Rhodamine Fluorophore

作者：Mergu Naveen; Singh Ashok Kumar; Gupta Vinod Kumar^*

来源：Sensors (Switzerland), 2015, 15(4): 9097-9111.

DOI：10.3390/s150409097

A series of rhodamine derivatives L1-L3 have been prepared and characterized by IR, H-1-NMR, C-13-NMR and ESI-MS. These compounds exhibited selective and sensitive "turn-on" fluorescent and colorimetric responses to Al3+ in methanol. Upon the addition of Al(III), the spiro ring was opened and a metal-probe complex was formed in a 1:1 stoichiometry, as was further confirmed by ESI-MS spectroscopy. The chemo-dosimeters L1-L3 exhibited good binding constants and low detection limits towards Al(III). We also successfully demonstrate the reversibility of the metal to ligand complexation (opened ring to spirolactam ring).

• 出版日期2015-4
• 单位中国石油大学（北京）