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A novel functionalized pillar[5]arene for forming a fluorescent switch and a molecular keypad

Author:
Wei, Tai-Bao, Chen, Jin-Fa, Cheng, Xiao-Bin, Li, Hui, Lin, Qi, Yao, Hong, Zhang, You-Ming
Source:
RSC advances 2016 v.6 no.70 pp. 65898-65901
ISSN:
2046-2069
Subject:
analytical kits, aromatic hydrocarbons, binding capacity, cadmium, calcium, cations, chromium, cobalt, copper, detection limit, dimethyl sulfoxide, emissions factor, fluorescence, fluorescence emission spectroscopy, iron, lead, magnesium, mercury, nickel, silver, zinc
Abstract:
We have synthesized a novel functionalized pillar[5]arene (PC5) and used it for fluorescent detection of iron ions (Fe³⁺). It displays a specificity response for iron ions over other common cations (Hg²⁺, Co²⁺, Ca²⁺, Ni²⁺, Pb²⁺, Cd²⁺, Zn²⁺, Cr³⁺, Cu²⁺, Mg²⁺ and Ag⁺) in a solution of DMSO/THF (1 : 4, v/v). Competitive cations did not show any significant changes in emission intensity and the fluorescence spectra detection limit was 1.25 × 10⁻⁸ M, indicating the high selectivity and sensitivity of the sensor to Fe³⁺. It is well known that H₂PO₄⁻ has a binding ability with Fe³⁺ to form the complex (Fe(H₂PO₄)₃), so we designed a fluorescent switch and a molecular keypad of PC5 between Fe³⁺ and H₂PO₄⁻. Furthermore, a thin film based on the PC5 was prepared, which was confirmed to be a convenient test kit for detecting iron ions.
Agid:
6410084