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A Hexanuclear Cadmium Metal–Organic Framework Exhibiting Dual Mechanisms to Trigger a Fluorescence‐Quenching Response toward Iron(III) Ions
Author(s) -
Li LongSheng,
Wang Xi,
Jia YanYuan,
Xu ShiXian,
Yu MeiHui,
Zhang YingHui
Publication year - 2018
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201701290
Subject(s) - chemistry , quenching (fluorescence) , fluorescence , photochemistry , metal organic framework , ion , metal ions in aqueous solution , microporous material , benzoic acid , metal , energy transfer , absorption (acoustics) , cadmium , inorganic chemistry , chemical physics , organic chemistry , adsorption , physics , quantum mechanics , acoustics
A hexanuclear Cd II metal–organic framework ( 1 ) based on 4‐(1 H ‐pyrazole‐4‐carboxamido)benzoic acid (H 2 L) and featuring a three‐dimensional microporous framework was synthesized. Notably, 1 shows a unique fluorescence‐quenching response toward Fe 3+ ions with high selectivity and sensitivity (Stern–Volmer constant K SV = 2.07 × 10 4 m –1 ). The response is attributable to the coaction of absorption competition and energy‐transfer (ET) mechanism. Furthermore, spectral analysis indicates that the energy‐transfer mechanism makes the dominant contribution to the fluorescence quenching of 1 .