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Polyoxometalate‐Based Entangled Coordination Networks Induced by an Extended Bis(triazole) Ligand
Author(s) -
Hao XiuLi,
Ma YuanYuan,
Zhou WenZhe,
Zang HongYing,
Wang YongHui,
Li YangGuang
Publication year - 2014
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201402958
Subject(s) - polyoxometalate , supramolecular chemistry , crystallography , stacking , ligand (biochemistry) , triazole , single crystal , chemistry , powder diffraction , type (biology) , synthon , biphenyl , stereochemistry , materials science , crystal structure , catalysis , organic chemistry , biochemistry , receptor , ecology , biology
Abstract The introduction of an extended bridging bis(triazole) ligand, that is, 4,4′‐bis(1,2,4‐triazol‐1‐ ylmethyl)biphenyl (BBPTZ), into the hydrothermal reaction system containing transition metal ions and Keggin‐type polyoxometalates (POMs) led to the isolation of three new organic–inorganic hybrid entangled coordination networks, [Cu I 2 Cu II (BBPTZ) 6 ][SiW 12 O 40 ]⋅12 H 2 O ( 1 ), [Ni(BBPTZ) 2 (H 2 O)][H 2 SiW 12 O 40 ]⋅11 H 2 O ( 2 ), and [Ni 2 (BBPTZ) 4 (H 2 O) 2 ][SiW 12 O 40 ]⋅3 H 2 O ( 3 ). All three compounds were characterized by elemental analysis, IR spectroscopy, TG analysis, powder X‐ray diffraction, and single‐crystal X‐ray diffraction. Compound 1 contains a 2‐D POM‐based metal–organic layer entangled with 1‐D ladder‐like metal–organic chains. The adjacent 2‐D networks are parallel to each other, further stacking into a 3‐D supramolecular framework with 1‐D channels. Compound 2 exhibits a 1‐D cantilever‐type loop‐containing chain. The Keggin‐type POMs act as the cantilever groups, leading to the adjacent catilever‐type chains interwaving together to form a 3‐D supramolecular open framework with two types of channels. Compound 3 possesses a 3‐D open framework based on 2‐D metal–organic undulated layer and Keggin‐type POM clusters. Three sets of such frameworks further interpenetrate with each other to form an interesting three‐fold interpenetrating framework. The photocatalytic activities of compounds 1–3 for the decomposition of methylene blue (MB) under UV light have been investigated.