Premium
Multi‐emissive 1D Cd(II) polymers with a biphenyl bridged bisazamacrocycle for ratiometric discrimination of nitroaromatics and selective visual detection of picric acid
Author(s) -
Sun Yao,
Huang Jin,
Lan BiLiu,
Wu JiQing,
Liang YuNing,
Zhang Zhong
Publication year - 2020
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.5774
Subject(s) - picric acid , chemistry , fluorescence , biphenyl , förster resonance energy transfer , ligand (biochemistry) , photochemistry , naked eye , detection limit , monomer , polymer , organic chemistry , chromatography , biochemistry , physics , receptor , quantum mechanics
Three one‐dimensional ladder‐like coordination polymers consisting of Cd 6 metalloring as the building unit, {[Cd 4 LCl 4 ]·3H 2 O} n ( 1 ), {[Cd 3 L(ClO 4 )(H 2 O)]ClO 4 ·3H 2 O} n ( 2 ), and {[Cd 6 (L) 2 (NO 3 ) 2 (CH 3 OH)(H 2 O)](NO 3 ) 2 ·2CH 3 OH·5H 2 O} n ( 3 ), were solvothermally constructed from a carboxylic functionalized bisazamacrocyclic ligand 4,4′‐bis((4,7‐bis(2‐carboxyethyl)‐1,4,7‐triazacyclonon‐1‐yl)methyl)‐1,1′‐biphenyl (H 4 L). These compounds dispersed in ethanol show the multiple emissions originating from the monomeric and intramolecularly overlapping biphenyl moieties which could be sensitively quenched by picric acid (PA) and 4‐nitrophenol (4‐NP) through the effective fluorescence resonance energy transfer process. The differential fluorescent responses of each compound on exposure to PA and 4‐NP individually make the convenient ratiometric discrimination of two analytes based on the fluorescent intensity ratio ( I 320 / I 360 ) attainable, and 1 and 2 as ratiometric chemosensors for PA present a broad linear detection range from 4 to 300 μM with detection limits of 0.84 and 0.93 μM, respectively. Furthermore, the blue light emission of 1 under an ultraviolet lamp could be selectively quenched by PA even in the presence of all other interfering nitroaromatic pollutants, which empowers the fast visual detection of PA by naked eye.