Highly Efficient Luminescent Polycarboxylate Lanthanide Complexes Incorporated into Di-Ureasils by an In-Situ Sol-Gel Process
authors Fang, M; Fu, LS; Correia, SFH; Ferreira, RAS; Carlos, LD
nationality International
journal POLYMERS
author keywords di-ureasil organic-inorganic hybrids; in-situ sol-gel synthesis; red emitters; white light emission
keywords ORGANIC-INORGANIC HYBRIDS; CARBOXYLIC-ACID SOLVOLYSIS; LIGHT-EMISSION; COORDINATION POLYMERS; MODIFIED SILICATES; QUANTUM YIELDS; IONS; 1,10-PHENANTHROLINE; PHOTOLUMINESCENCE; NANOHYBRIDS
abstract In order to prepare efficient luminescent organic-inorganic hybrid materials embedded with a lanthanide (Ln(3+)) complex with polycarboxylate ligands, Ln(3+)-doped di-ureasils with 4,4-oxybis(benzoic acid) and 1,10-phenanthroline ligands were synthesized via an in-situ sol-gel route. The resulting hybrids were structurally, thermally, and optically characterized. The energy levels of the ligands and the host-to-ion and ligand-to-ion energy transfer mechanisms were investigated (including DFT/TD-DFT calculations). The results show that these Ln(3+)-based di-ureasil hybrids exhibit promising luminescent features, e.g., Eu3+-based materials are bright red emitters displaying quantum yields up to 0.50 +/- 0.05. The luminescent color can be fine-tuned either by selection of adequate Ln(3+) ions or by variation of the excitation wavelength. Accordingly, white light emission with CIE coordinates of (0.33, 0.35) under 310 nm irradiation was obtained.
publisher MDPI
issn 2073-4360
year published 2018
volume 10
issue 4
digital object identifier (doi) 10.3390/polym10040434
web of science category Polymer Science
subject category Polymer Science
unique article identifier WOS:000435087400092
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