Supramolecular isomerism in cadmium (II) coordination polymers from benzene-1,3,5-tribenzoate (BTB): Syntheses, structures and luminescent properties
| Autor: | Jian-Yong Zhang, Na Zhang, Jun-Xia Shi, Wei Deng, Cui Penghui |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
chemistry.chemical_classification
Chemistry Ligand Stereochemistry Supramolecular chemistry 02 engineering and technology Polymer 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Fluorescence 0104 chemical sciences Electronic Optical and Magnetic Materials Inorganic Chemistry Solvent chemistry.chemical_compound Crystallography Materials Chemistry Ceramics and Composites Formate Physical and Theoretical Chemistry 0210 nano-technology Benzene Luminescence |
| Zdroj: | Journal of Solid State Chemistry. 256:227-233 |
| ISSN: | 0022-4596 |
| Popis: | By tuning the solvent mixture, four Cd II -based compounds, [Cd 3 (BTB) 2 (DMA) 4 ]·2DMA ( 1α ), [Cd 3 (BTB) 2 (DMA) 4 ]·2DMA ( 1β ), [Cd 3 (BTB) 2 (DMF) 4 ]·2DMF ( 1γ ), Cd 2 (BTB)(HCOO)(DMF) 3 ( 2 ) have been successfully separated from H 3 BTB ligand and Cd(NO 3 ) 2 salts. Structural analyses revealed that compounds 1α , 1β and 1γ are iso-structural and have essentially identical local and two-dimensional structures constructed from trinuclear Cd 3 (OCO) 6 unit. Their structural differences only arise from the different packing fashions, which are novel modes of supramolecular isomerism in coordination polymers. Compound 2 displays 3D two-fold interpenetrated network based on 1D infinite Cd 3 (μ 1,1,3 -OCO) 2 (HCOO) chains containing mixed BTB 3- and formate ligands. The fluorescence measurements show that compounds 2 exhibit red-shifts (about 25 nm) in the solid state, compared with three iso-structural 1α , 1β and 1γ , and this can be attributed to the cooperative effects of intraligand π-π* transitions and ligand-to-metal charge transfer (LMCT). |
| Databáze: | OpenAIRE |
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