Synthesis, photophysical and oxygen-sensing properties of a novel Eu{sup 3+} complex incorporated in mesoporous MCM-41

Journal Article · Thu Jul 15 00:00:00 EDT 2010 · Journal of Solid State Chemistry

OSTI ID:21421567

Qinghui, Zuo ^[1]; Liming, Zhang; Yinghui, Wang; Yanhong, Liu ^[1]; Jun, Zhang; Ying, Chen; Lifan, Guo ^[2]

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1. Key Laboratory of Excited State Processes, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033 (China)
2. Polyoxometalate Science Key Laboratory of Ministry of Education, Department of Chemistry, Northeast Normal University, Changchun 130024 (China)

A novel Eu{sup 3+} complex of Eu(DPIQ)(TTA){sub 3} (DPIQ=10H-dipyrido [f,h] indolo [3,2-b] quinoxaline, TTA=2-thenoyltrifluoroacetonate) was synthesized and encapsulated in the mesoporous MCM-41, hoping to explore an oxygen-sensing system based on the long-lived Eu{sup 3+} emitter. The Eu(DPIQ)(TTA){sub 3}/MCM-41 composites were characterized by infrared spectra (IR), ultraviolet-visible (UV-vis) absorption spectra, small-angle X-ray diffraction (SAXRD), luminescence intensity quenching upon various oxygen concentrations, and fluorescence decay analysis. The results indicated that the composites exhibited the characteristic emission of the Eu{sup 3+} ion and the fluorescence intensity of {sup 5}D{sub 0}-{sup 7}F{sub 2} obviously decreased with increasing oxygen concentrations. The oxygen sensing properties of the composites with different loading levels of Eu(DPIQ)(TTA){sub 3} complex were investigated. A sensitivity of 3.04, a short response time of 7 s, and good linearity were obtained for the composites with a loading level of 20 mg/g. These results are the best reported values for optical oxygen-sensing materials based on Eu{sup 3+} complexes so far. - Graphical abstract: Novel optical oxygen-sensing composites are prepared by incorporating a novel Eu{sup 3+} complex Eu(DPIQ)(TTA){sub 3} into MCM-41. The emission intensity of Eu(DPIQ)(TTA){sub 3}/MCM-41 composites exhibits a strong oxygen dependent characteristic and the composite with a loading level of 20 mg/g possesses better fluorescence quenching with increasing oxygen concentrations.

• OSTI ID: 21421567
• Journal Information: Journal of Solid State Chemistry, Vol. 183, Issue 7; Other Information: DOI: 10.1016/j.jssc.2010.05.022; PII: S0022-4596(10)00223-9; Copyright (c) 2010 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
77 NANOSCIENCE AND NANOTECHNOLOGY
ABSORPTION SPECTRA
EUROPIUM COMPLEXES
EUROPIUM IONS
FLUORESCENCE
INFRARED SPECTRA
NANOSTRUCTURES
OXYGEN
QUENCHING
SENSITIVITY
SYNTHESIS
TTA
ULTRAVIOLET SPECTRA
VISIBLE SPECTRA
X-RAY DIFFRACTION
CHARGED PARTICLES
COHERENT SCATTERING
COMPLEXES
DIFFRACTION
ELEMENTS
EMISSION
HETEROCYCLIC COMPOUNDS
IONS
KETONES
LUMINESCENCE
NONMETALS
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PHOTON EMISSION
RARE EARTH COMPLEXES
SCATTERING
SPECTRA