The preparation and performance of visible-light-sensitized luminescent nanoparticles based on europium complex

• Published in: Chinese chemical letters Vol. 25; no. 2; pp. 247 - 252
• Main Authors: Xue, Fu-Min, Liang, Ming-Hui, Wang, Zhen-Hua, Luan, Ling-Yu, Li, Fu-Wei, Cheng, Yan, Shao, Guang-Sheng
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.02.2014
• Subjects: Bio-detection; Co-precipitation-condensation; Europium nanoparticles; Long-wavelength-sensitized luminescence; 制备; 可见光; 基础; 敏化发光; 甲基丙烯酸甲酯; 纳米粒子; 纳米颗粒; 铕配合物; Long-wavelength-sensitized luminescence; Europium nanoparticles; Bio-detection; Co-precipitation-condensation
• ISSN: 1001-8417; 1878-5964
• DOI: 10.1016/j.cclet.2013.10.030

Long-wavelength-sensitized luminescent materials are desired for bio-detection. In this paper, we prepared a new kind of luminescent europium nanoparticles by a co-precipitation-condensation method. The luminescent europium complex Eu（tta）3.bpt （tta = thenoyltrifluoroacetonate; bpt = 2-（N,N- di-ethylanilin-4-yl）-4,6-bis（pyrazol-l-yl）-l,3,5-triazine） was used as the active material, being encapsulated in the nanoparticles formed from 1H, 1H, 2H, 2H-perfluorooctyltrimethoxysilane （PFOTS） and poly（styrene-co-methyl methacrylate） [P（ST-co-MMA）]. The prepared nanoparticles not only can be well dispersed in water but also were of high photostability. Importantly, the nanoparticles displayed maximal excitation wavelength at 425 nm as well as an extended excitation wavelength up to 480 nm and a quantum yield for Eu3＋ luminescence of 0.22 （λex= 425 nm, room temperature）.