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Two Cadmium Coordination Compounds with 5‐Sulfonyl‐1,2,4‐benzenetricarboxylate Ligand: Syntheses, Structures, and Photoluminescence
Author(s) -
Cao HaiYan,
Liu QingYan,
Li LiQin,
Wang YuLing,
Chen LiLi,
Yao Yang
Publication year - 2014
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201300681
Subject(s) - chemistry , supramolecular chemistry , sulfonate , molecule , cadmium , hydrogen bond , carboxylate , ligand (biochemistry) , sulfonyl , crystallography , crystal structure , stereochemistry , medicinal chemistry , inorganic chemistry , organic chemistry , sodium , biochemistry , receptor , alkyl
Two new cadmium(II) coordination compounds, [Cd 4 (SBTC) 2 (2,2′‐bpy) 6 (H 2 O) 4 ](2,2′‐bpy) ( 1 ) (2,2′‐bpy = 2,2′‐bipyridyl) and {[K 2 Cd(SBTC)(H 2 O) 4 ](H 2 O) 2 } n ( 2 ), were synthesized using a novel ligand of 5‐sulfonyl‐1,2,4‐bezenetricarboxylic acid (H 4 ‐SBTC) featuring three carboxylate groups and one sulfonate group stationed on a phenyl central motif. Compound 1 is a discrete tetranuclear [Cd 4 (SBTC) 2 (2,2′‐bpy) 6 (H 2 O) 4 ] structure with a solvated 2,2′‐bpy molecule, wherein the four cadmium ions are bridged by two μ 3 ‐SBTC 4– ligands. The discrete tetranuclear [Cd 4 (SBTC) 2 (2,2′‐bpy) 6 (H 2 O) 4 ] motif is extended into a three‐dimensional (3D) supramolecular framework through hydrogen bonds and π–π interactions. In compound 2 the cadmium ions and potassium ions are interconnected by the SBTC 4– ligands and bridging water molecules to give a complex 3D structure. The 3D structure is constructed by a rare 3D inorganic cadmium‐potassium‐oxide framework, in which the cadmium and potassium ions are bridged by the sulfonate groups and bridging water molecules. In the solid state, compounds 1 and 2 exhibit photoluminescence with emission maximum at 380 and 445 nm, respectively.