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Int. J. Mol. Sci. 2012, 13(3), 3718-3737; doi:10.3390/ijms13033718
Article

Photosensized Controlling Benzyl Methacrylate-Based Matrix Enhanced Eu3+ Narrow-Band Emission for Fluorescence Applications

1,†
, 1,†
, 2
, 1
, 3,*  and 1,*
1 Department of Materials Science and Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan 2 Instrumentation Center, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan 3 College of Pharmacy, School of Pharmacy, Taipei Medical University, Taipei 11031, Taiwan
* Authors to whom correspondence should be addressed.
Received: 3 February 2012 / Revised: 14 March 2012 / Accepted: 15 March 2012 / Published: 21 March 2012
(This article belongs to the Special Issue Correlation Analysis Applied to Solvolysis Reactions)
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Abstract

This study synthesized a europium (Eu3+) complex Eu(DBM)3Cl-MIP (DBM = dibenzoyl methane; Cl-MIP = 2-(2-chlorophenyl)-1-methyl-1H-imidazo[4,5-f][1,10]phenanthroline) dispersed in a benzyl methacrylate (BMA) monomer and treated with ultraviolet (UV) light for polymerization. Spectral results showed that the europium complex containing an antenna, Cl-MIP, which had higher triplet energy into the Eu3+ energy level, was an energetically enhanced europium emission. Typical stacking behaviors of π–π interactions between the ligands and the Eu3+-ion were analyzed using single crystal X-ray diffraction. Regarding the luminescence performance of this europium composite, the ligand/defect emission was suppressed by dispersion in a poly-BMA (PBMA) matrix. The underlying mechanism of the effective enhancement of the pure Eu3+ emission was attributed to the combined effects of structural modifications, defect emissions, and carrier charge transfer. Fluorescence spectra were compared to the composite of optimized Eu3+ emission where they were subsequently chelated to four metal ions via carboxylate groups on the BMA unit. The optical enhanced europium composite clearly demonstrated highly efficient optical responses and is, therefore a promising application as an optical detection material.
Keywords: europium complex; UV-curing; optical tuning; metal-ion chelating; fluorescence detection europium complex; UV-curing; optical tuning; metal-ion chelating; fluorescence detection
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Lee, J.-F.; Chen, H.-L.; Lee, G.-S.; Tseng, S.-C.; Lin, M.-H.; Liau, W.-B. Photosensized Controlling Benzyl Methacrylate-Based Matrix Enhanced Eu3+ Narrow-Band Emission for Fluorescence Applications. Int. J. Mol. Sci. 2012, 13, 3718-3737.

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