A dual-responsive luminescent sensor based on a water-stable Cd(ii)-MOF for the highly selective and sensitive detection of acetylacetone and Cr2O72− in aqueous solutions

Two new water-stable cadmium(ii)-metal organic frameworks (MOFs), namely [Cd2(L1)(1,4-NDC)2]n (1) and [Cd(L2)(1,4-NDC)]n (2) (L1 = 1,4-bis(benzimidazol-1-yl)-2-butylene, L2 = 1,4-bis(2-methylbenzimidazol-1-yl)-2-butylene and 1,4-H2NDC = 1,4-naphthalenedicarboxylic acid), were synthesized and charact...

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Bibliographic Details
Published in:CrystEngComm 2020-01, Vol.22 (7), p.1166-1175
Main Authors: Ying-Jie, Yang, Yue-Hua, Li, Liu, Dong, Guang-Hua Cui
Format: Article
Language:English
Subjects:
Acetylacetone
Aqueous solutions
Crystallography
Metal-organic frameworks
Recyclability
Selectivity
Sensors
Water stability
Water treatment
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Summary:Two new water-stable cadmium(ii)-metal organic frameworks (MOFs), namely [Cd2(L1)(1,4-NDC)2]n (1) and [Cd(L2)(1,4-NDC)]n (2) (L1 = 1,4-bis(benzimidazol-1-yl)-2-butylene, L2 = 1,4-bis(2-methylbenzimidazol-1-yl)-2-butylene and 1,4-H2NDC = 1,4-naphthalenedicarboxylic acid), were synthesized and characterized. 1 exhibits an unusual 3D framework with the Schläfli symbol of {42·5·62·7}{42·52·72}{42·53·62·73}2, and 2 is a classical sqc6 network. 1 and 2 display excellent pH and water stability, and the integrity of the frameworks was well maintained at different pH values (pH = 3–13) and after long-term water treatment. 1 is the first dual-function luminescent sensor for sensing acetylacetone and Cr2O72− in aqueous solutions with high sensitivity, selectivity and excellent recyclability. This material is an excellent dual-responsive recyclable luminescent sensor.
ISSN:1466-8033
DOI:10.1039/c9ce01546a