1. Two highly stable inorganic–organic hybrid 3D frameworks based on Cu–Ln incorporated polyoxometalates for selective dye removal and proton conduction.
- Author
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Zhang, Rong-Tao, Xiao, Hui-Ping, Li, Zhong, Wang, Min, Xie, Yu-Feng, Ye, Yi-Da, Li, Xin-Xiong, and Zheng, Shou-Tian
- Subjects
POLYOXOMETALATES ,BASIC dyes ,COPPER compounds ,PROTONS ,CHEMICAL stability - Abstract
Two novel inorganic–organic hybrid 3D TM–Ln incorporated POM-based frameworks, H
2 [Cu2 OL3 (H2 O)2 ][Ce(L)(H2 O)3 (PW11 O39 )]·17H2 O (1) and H4 [CuL3 ]2 [Ln(H2 O)3 (PW11 O39 )]2 ·28H2 O (2) (L = 4,4′-bipyridine), were hydrothermally synthesized at different temperatures. Structural analysis reveals that both compounds are constructed from [Ln(PW11 O39 )]4− polyoxoanions and different copper complexes. Interestingly, in compound 1, 2D copper complex layers and 1D chain [Ln(PW11 O39 )]4− polyoxoanions interconnect to form a 3D framework. In contrast, in compound 2, 1D copper complex chains join the 2D [Ln(PW11 O39 )]4− layers to give rise to a 3D framework. Both compounds exhibit excellent chemical stability. Furthermore, the dye adsorption and proton conduction properties of both compounds were also investigated. The conductivities of 1 and 2 are 3.175 × 10−4 S cm−1 and 1.750 × 10−4 S cm−1 at 85 °C and 98% RH, respectively. Dye adsorption studies indicate that they can selectively adsorb cationic dyes MB, CV and BR over anionic dyes MO, AO and large cationic RhB. [ABSTRACT FROM AUTHOR]- Published
- 2021
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