Synthesis of pyrazolylbisindoles over mesoporous Lewis acidic ZrTUD-1: Potential application in selective Cu2+ colorimetric detection
作者:Karthikeyan Kandasamy、Sivaprasad Ganesabaskaran、Muthusamy Poomalai Pachamuthu、Rajamanickam Maheswari、Anand Ramanathan
DOI:10.1016/j.saa.2015.05.009
日期:2015.11
A series of pyrazolylbisindole (PBI) derivatives were prepared by simple condensation of indole and pyrazole aldehyde utilizing amorphous mesoporous ZrTUD-1 having predominant Lewis acid sites. The applicability of pyrazolylbisindolyl derivate as a colorimetric chemosensor with high selectivity toward Cu2+ over other cations were tested. Among heavy and transition metal (HTM) ions in CH3CN solution, the probe only sensed Cu2+ detectable by naked eye. The sensor exhibited a new absorption band at 488 nm (a red shift of 206 nm from 282 nm) with a large colorimetric response and affinity to Cu2+ over other cations tested (Al3+, Pb2+, Cd2+, Mg2+, Mn2+, Zn2+, K+, Fe2+, Ca2+, Cu2+ and Hg2+). (c) 2015 Elsevier B.V. All rights reserved.