Issue 23, 2011

Temperature-controlled synthesis of two novel coordination polymers modeled by semi-rigid tetrapyridines

Abstract

Solvothermal reactions of tetrakis(4-pyridyloxymethylene)methane (TPOM) with deprotonated benzoate (L1) in the presence of acetate (L2) of copper in H2O/CH3OH with reactant ratio 1 : 2 : 2 under different synthesis temperatures produced two new complexes, namely, {[Cu2(TPOM)2(L1)2(L2)2]·Guest}n (1), and {[Cu4(TPOM)(L1)2(L2)4(OH)2]·6H2O}n (2). These complexes were characterized by elemental analysis, IR spectroscopy, and X-ray single-crystal diffraction. Complex 1 reveals a 3D crystal structure with a novel 2,3,4-connected 3-nodal topology constructed from the connection of Cu centers and TPOM ligands, which neutralized the mono-dentate carboxylates from different ligands coordinated to Cu ions. Complex 2 exhibits a distinct 3D framework with 2-nodal PtS topology, constructed from the connection of neutral Cu4 SBUs and TPOM ligands. The increasing reaction temperature must be responsible for the versatile coordination modes of carboxylates in 2 compared to the ones in 1, resulting in the formation of the distinct crystal structure. In addition, magnetic investigations on complex 2 revealed antiferromagnetic intra-tetramer interactions through the mixed hydroxo and carboxylato bridges.

Graphical abstract: Temperature-controlled synthesis of two novel coordination polymers modeled by semi-rigid tetrapyridines

Supplementary files

Article information

Article type
Paper
Submitted
12 May 2011
Accepted
12 Sep 2011
First published
20 Oct 2011

CrystEngComm, 2011,13, 7025-7031

Temperature-controlled synthesis of two novel coordination polymers modeled by semi-rigid tetrapyridines

F. Yu and B. Li, CrystEngComm, 2011, 13, 7025 DOI: 10.1039/C1CE05549F

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