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Novel Ba 2+ and Pb 2+ metal–organic frameworks based on a semi‐rigid tetracarboxylic acid: syntheses, structures, topologies and luminescence properties
Author(s) -
Sun Yanwen,
Chen Zhen,
Wang Xiaozhong,
Wang Lei,
Yang Xue,
Liang Xiaoting,
Fan Shuangshuang,
Zhang Peiran
Publication year - 2021
Publication title -
acta crystallographica section c
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 17
ISSN - 2053-2296
DOI - 10.1107/s2053229621005143
Subject(s) - sbus , metal organic framework , isophthalic acid , crystallography , luminescence , carboxylate , thermogravimetric analysis , denticity , ligand (biochemistry) , metal , powder diffraction , chemistry , crystal structure , infrared spectroscopy , materials science , stereochemistry , terephthalic acid , organic chemistry , biochemistry , receptor , optoelectronics , adsorption , polyester
Multidentate carboxylate ligands have been widely used in the construction of metal–organic frameworks (MOFs) owing to the rich variety of their coordination modes, which can lead to crystalline products with interesting structures and properties. Two new main‐group MOFs, namely, poly[[di‐μ‐aqua‐diaqua(dimethylformamide)[μ 7 ‐5,5′‐methylenebis(2,4,6‐trimethylbenzene‐1,3‐dicarboxylato)]dibarium(II)] trihydrate], {[Ba 2 (C 23 H 20 O 8 )(C 3 H 7 NO)(H 2 O) 4 ]·3H 2 O} n or {[Ba 2 (BTMIPA)(DMF)(H 2 O) 4 ]·3H 2 O} n ( 1 ), and poly[[diaqua[μ 6 ‐5,5′‐methylenebis(2,4,6‐trimethylbenzene‐1,3‐dicarboxylato)]dilead(II)] 2.5‐hydrate], {[Pb 2 (C 23 H 20 O 8 )(H 2 O) 2 ]·2.5H 2 O} n or {[Pb 2 (BTMIPA)(H 2 O) 2 ]·2.5H 2 O} n ( 2 ), were prepared by the self‐assembly of metal salts with the semi‐rigid tetracarboxylic acid ligand 5,5′‐methylenebis(2,4,6‐trimethylisophthalic acid) (H 4 BTMIPA). Both structures were characterized by elemental analysis (EA), single‐crystal X‐ray diffraction, powder X‐ray diffraction (PXRD), IR spectroscopy and thermogravimetric analysis (TGA). Complex 1 reveals a three‐dimensional (3D) flu network formed via bridging tetranuclear secondary building units (SBUs) and complex 2 displays a 3D framework with an sqp topology based on one‐dimensional metal chains. The BTMIPA 4− ligands adopt a rare coordination mode in 2 , although the ligands in both 1 and 2 are X‐shaped. The luminescence properties of both complexes were investigated in the solid state.