title: Photosensized controlling benzyl methacrylate-based matrix enhanced Eu(3+) narrow-band emission for fluorescence applications.
abstract: This study synthesized a europium (Eu(3+)) complex Eu(DBM)(3)Cl-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 Eu(3+) energy level, was an energetically enhanced europium emission. Typical stacking behaviors of π-π interactions between the ligands and the Eu(3+)-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 Eu(3+) 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.
authors.affiliation: Department of Materials Science and Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan.
authors.forename: Jiann-Fong
authors.initials: JF
authors.lastname: Lee
authors.affiliation: Department of Materials Science and Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan.
authors.forename: Hsuen-Li
authors.initials: HL
authors.lastname: Chen
authors.affiliation: Instrumentation Center, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan.
authors.forename: Geneh-Siang
authors.initials: GS
authors.lastname: Lee
authors.affiliation: Department of Materials Science and Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan.
authors.forename: Shao-Chin
authors.initials: SC
authors.lastname: Tseng
authors.affiliation: College of Pharmacy, School of Pharmacy, Taipei Medical University, Taipei 11031, Taiwan.
authors.forename: Mei-Hsiang
authors.initials: MH
authors.lastname: Lin
authors.affiliation: Department of Materials Science and Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan.
authors.forename: Wen-Bin
authors.initials: WB
authors.lastname: Liau
mesh_terms: D005063:Europium / Q000737:chemistry*; D005453:Fluorescence; D005456:Fluorescent Dyes / Q000737:chemistry*; D008024:Ligands; D049449:Luminescence; D008689:Methacrylates / Q000737:chemistry*; D015394:Molecular Structure; D010618:Phenanthrolines / Q000737:chemistry; D017319:Photosensitizing Agents; D013050:Spectrometry, Fluorescence; D014961:X-Ray Diffraction
chemical_list: D005456:Fluorescent Dyes; D008024:Ligands; D008689:Methacrylates; D010618:Phenanthrolines; D017319:Photosensitizing Agents; D005063:Europium; C512584:benzyl methacrylate