In situ synthesis and luminescence characteristics of complexes of europium(III) with 4,6-diacetylresorcinol

Journal Article · Mon Aug 04 04:00:00 EDT 2008 · Materials Research Bulletin

OSTI ID:21144100

Shengli, Liu ^[1]; Chunlin, Wen; Chun, Chen; Susu, Qi; Enxiang, Liang ^[1]

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1. School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201 (China)

The complexes of europium(III) with 4,6-diacetylresorcinol (H{sub 2}DAR) and a co-ligand (phen, bpy or 2,2'-bipyridine N,N'-dioxide (2,2'-bpyO{sub 2})) were in situ synthesized in silica matrix via a two-step gel process. The formation of complexes in silica gel was confirmed by the luminescence excitation spectra. The silica gels that contain in situ synthesized europium complexes exhibit the characteristic emission bands of the Eu(III). The results show that there are two ways to enhance the emission intensity of the Eu(III): (i) synthesize the complex in silica matrix and (ii) synthesize the complex with a co-ligand, which coordinates with Eu(III) in the composite system and can efficiently transfer the energy from 4,6-diacetylresorcinol to the Eu(III). The order of the luminescence intensities of the complexes is: Eu{sub 2}(DAR){sub 3}(phen){sub 2}-(sol-gel) > Eu{sub 2}(DAR){sub 3}(2,2'-bpyO{sub 2}){sub 2}-(sol-gel) > Eu{sub 2}(DAR){sub 3} (bpy){sub 2}-(sol-gel) > Eu{sub 2}(DAR){sub 3}-(sol-gel) > pure Eu{sub 2}(DAR){sub 3}.4H{sub 2}O.

• OSTI ID: 21144100
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Journal Issue: 8-9 Vol. 43; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
EUROPIUM COMPLEXES
LIGANDS
LUMINESCENCE
SILICA
SILICA GEL
SOL-GEL PROCESS
SYNTHESIS