Two copper (II) complexes based on different copper salts, 1,3-benzenedicarboxylic acid and 1,4-di(imidazolidin-1-yl) benzene and their fluorescence recognition to nitrobenzene derivatives
Abstract
Hydrothermal reactions of 1,3-benzenedicarboxylic acid (H2bdc) and 1,4-di(imidazolidin-1-yl)benzene (1,4-dimb) with different copper salts (cupric nitrate and cupric sulfate) produce two complexes, {[Cu(bdc)(1,4-dimb)]·(DMA)}n (1) and {[Cu4(bdc)3(1,4-dimb)4](O2)(H2O)8(OH)2}n (2) (DMA = dimethylacetamide), and their structures and properties are explored by single crystal X-ray crystallography, elemental analysis, IR spectroscopy, powder X-ray diffraction, thermal gravimetric analysis and fluorescence spectroscopy. Both 1 and 2 are two-dimensional layered structures crystallized from the monoclinic systems, P21/m space group. Fluorescence studies show that both complexes exhibit strong fluorescent emissions and can be used to identify the nitrobenzene derivatives. In particular, the quenching rate of 2 by 2, 4, 6-trinitrotoluene is close to 100% and the quenching constant is as high as 3.40 × 104 M-1.
- Publication:
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Journal of Solid State Chemistry France
- Pub Date:
- July 2020
- DOI:
- 10.1016/j.jssc.2020.121334
- Bibcode:
- 2020JSSCh.28721334W
- Keywords:
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- 1;
- 3-benzenedicarboxylic acid;
- 1;
- 4-di(imidazolidin-1-yl)benzene;
- Hydrothermal synthesis;
- Crystal structure;
- Fluorescence