Three coordination polymers based on a star-like geometry 4, 4', 4'' -nitrilotribenzoic acid ligand and their framework dependent luminescent properties
Abstract
Three novel coordination polymers, [Zn(μ2-HTCA)(Phen)]n (1), {[Cd(μ3-HTCA)(Phen)]·2H2O}n (2), [Mn(μ2-HTCA)(Phen)(H2O)]n (3) were prepared by hydrothermal synthesis from the 4, 4', 4''-nitrilotribenzoicacid (H3TCA) and 1, 10-phenanthroline monohydrate (Phen) with different transition metal salts, which were characterized by elemental analysis, IR spectra, powder and single-crystal X-ray diffraction and thermogravimetric analysis. The photophysical properties of the complexes were investigated by solid-state diffuse reflectance spectra, photoluminescent properties, lifetime and quantum yield. For these complexes, it was found that the band gaps follow the order: 3 < 2 < 1 < 2.80 eV, fluorescence intensity order: 1 > H3TCA > 2 > 3; quantum yield order: H3TCA > 1 > 2 > 3; while the lifetime order: 1 > 2 > H3TCA > 3.
- Publication:
-
Journal of Solid State Chemistry France
- Pub Date:
- February 2018
- DOI:
- 10.1016/j.jssc.2017.10.027
- Bibcode:
- 2018JSSCh.258..328H
- Keywords:
-
- Coordination polymers;
- Luminescence;
- Hydrothermal synthesis;
- 4;
- 4';
- 4'' -nitrilotribenzoic acid