Issue 90, 2014

Luminescent group 12 metal tetracarboxylate networks as probe for metal ions

Abstract

Hydrothermal in situ decomposition of DMF generated three [NH2(CH3)2]+ cation templated anionic zinc and cadmium terphenyl-3,2′′,5′′,3′-tetracarboxylate (tpta) frameworks. Compound 1 shows a kgd topological layer constructed by 6-connected paddlewheel-type [Zn2(CO2)4] SUBs and 3-connected tpta groups. Compound 2 has a 3D sra network constructed by the zigzag chains of metal centers and tpta groups. Compound 3 adopts a new (4,7)-connected topological network with four types of nodes. Compounds 1–3 show two blue phosphorescent emission bands attributed to ligand centered transitions perturbed by metal ions, which displays significant temperature-dependent behavior. The higher energy emissions are red-shifted and weakened with increasing temperature, while the lower energy emissions increase in intensity and finally become the main emission bands; the CIE coordinates for 1 are changed with decreasing temperature from blue to greenish blue. Interestingly, 1 could selectively detect traces of Ca2+ ions at ppm level in a pyridine suspension, which makes it more suitable to be a luminescent probe for sensing Ca+ ions.

Graphical abstract: Luminescent group 12 metal tetracarboxylate networks as probe for metal ions

Supplementary files

Article information

Article type
Paper
Submitted
03 Jun 2014
Accepted
16 Sep 2014
First published
16 Sep 2014

RSC Adv., 2014,4, 49090-49097

Author version available

Luminescent group 12 metal tetracarboxylate networks as probe for metal ions

H. Ren, C. Han, M. Qu and X. Zhang, RSC Adv., 2014, 4, 49090 DOI: 10.1039/C4RA05275G

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