Issue 14, 2004

Influence of organic bases on constructing 3D photoluminescent open metal–organic polymeric frameworks

Abstract

Four three-dimensional non-interpenetrating open coordination frameworks constructed from the CTC ligand (CTC = cis,cis-1,3,5-cyclohexanetricarboxylate) coordinated to metal ions (Mn(II) and Cd(II)): Mn3(CTC)2(DMF)2 (1); Cd3(CTC)2(H2O)3·H2O (2); Cd3(CTC)2(4,4′-bpy)2(EG)2 (3); Cd3(CTC)22-hmt)(DMF) (C2H5OH)(H2O)·2H2O (4) (DMF = dimethylformamide and EG = ethylene glycol) have been synthesized by slow evaporation of DMF–C2H5OH–H2O solutions of M(II) (Mn(II) or Cd(II)) and CTC in the presence of the organic bases TEA (triethylamine), TEA, 4,4′-bpy (4,4′-bipyridine) and hmt (hexamethylenetetramine), respectively, and structurally characterized by X-ray crystallography. The polymer 1 constructed by CTC and Mn(II) exhibits a 3-D architecture with 5 × 9 Å channels; the polymer 2 formed by CTC and Cd(II) exists a 3-D extended framework with 9 × 9 Å channels; wave-like sheet subunits of the polymer 3 are upheld by 4,4′-bpy ligands resulting in a 3-D framework with 4 × 10 Å channels; two-fold alternate sheet subunits of the polymer 4 are interlinked by μ2-hmt ligands to form a novel 3-D architecture with 7 × 8 Å channels. Polymers 2–4 exhibit their strongest excitation peaks at 391, 390 and 394 nm, respectively, and their main strong emission peaks are at 543, 460 (with a shoulder peak at about 570 nm) and 557 nm, respectively.

Graphical abstract: Influence of organic bases on constructing 3D photoluminescent open metal–organic polymeric frameworks

Article information

Article type
Paper
Submitted
23 Feb 2004
Accepted
26 May 2004
First published
10 Jun 2004

Dalton Trans., 2004, 2202-2207

Influence of organic bases on constructing 3D photoluminescent open metal–organic polymeric frameworks

Q. Fang, G. Zhu, M. Xue, J. Sun, G. Tian, G. Wu and S. Qiu, Dalton Trans., 2004, 2202 DOI: 10.1039/B402715A

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