Mixed matrix membranes containing fluorescent coordination polymers for detecting Cr 2 O 7 2− with high sensitivity, stability and recyclability

Three coordination polymers (CPs) were synthesized by using Cd II , fluorescent 9,10-di(4-pyridyl)anthracene ( dpa ), and cyclohexane-1,4-dicarboxylic acid (H 2 cda ), and they are [Cd 2 ( dpa ) 2 ( cda )Cl 2 ] n ( 1 ), [Cd( dpa ) 2 ( cda )] n ( 2 ) and [Cd( dpa )( cda )(H 2 O)] n ( 3 ). Both 1 and...

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Published in:Dalton transactions : an international journal of inorganic chemistry 2021-06, Vol.50 (23), p.7944-7948
Main Authors: Xu, Yong-Kai, Meng, Mei-Mei, Xi, Ji-Ming, Wang, Li-Fei, Zhu, Rui, Liu, Xing-Gui, Zhang, Rui, Dong, Wei, Lu, Zhen-Zhong, Zheng, He-Gen, Huang, Wei
Format: Article
Language:English
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Summary:Three coordination polymers (CPs) were synthesized by using Cd II , fluorescent 9,10-di(4-pyridyl)anthracene ( dpa ), and cyclohexane-1,4-dicarboxylic acid (H 2 cda ), and they are [Cd 2 ( dpa ) 2 ( cda )Cl 2 ] n ( 1 ), [Cd( dpa ) 2 ( cda )] n ( 2 ) and [Cd( dpa )( cda )(H 2 O)] n ( 3 ). Both 1 and 2 are fluorescent and contain nonporous layers. 3 is an isomer of 2 and contains a porous diamondoid network. Fluorescent mixed matrix membranes were prepared by dispersing the particles of 1 or 2 within the matrix of polymethyl methacrylate, and showed high sensitivity and selectivity for detecting Cr 2 O 7 2− in water. Both stability and recyclability of the MMMs were remarkably higher than those of the CP powders.
ISSN:1477-9226
1477-9234
DOI:10.1039/D1DT00894C