项目名称: 稀土硫氧化物上转换荧光探针的一步合成与生物成像研究
项目编号: No.11504039
项目类型: 青年科学基金项目
立项/批准年度: 2016
项目学科: 数理科学和化学
项目作者: 邢明铭
作者单位: 大连海事大学
项目金额: 24万元
中文摘要: 针对妨碍β-NaYF4:Yb,Er/Tm上转换荧光探针在生物医学领域应用的量子产率低的瓶颈问题,本项目开展在中低激发密度下具有更高上转换发光效率的稀土硫氧化物荧光探针的一步合成与生物成像应用研究。采用抗氧化的Ln(S2CNEt2)3(Phen)配合物为前驱体,高沸点有机化合物为溶剂,以含有可与生物分子连接官能团的两性聚合物作为表面活性剂,研究一步合成法制备粒径小于20nm的单分散、球形、生物兼容的稀土硫氧化物上转换荧光探针。利用核-壳结构提高发光效率,改善光学性能,并与β-NaYF4:Yb,Er/Tm上转换荧光探针进行生物成像的对比研究,期望为改善现有上转换荧光探针量子产率低的问题提供一个新思路。
中文关键词: 上转换;纳米粒子;硫氧化物;一步合成
英文摘要: Aiming at the low quantum yield problem of hindering the application of β-NaYF4:Yb,Er/Tm upconversion fluorescence probe in the field of biomedical, this project studies the one-pot synthesis and biological imaging of rare earth oxysulfide upconversion fluorescent probe, which has the higher upconversion efficiency compared with that of β-NaYF4:Yb,Er/Tm under medium/low density excitation. We investigate the one-pot synthesis of monodisperse spherical biocompatible rare earth doped oxysulfide upconversion fluorescent probe whose size is less than 20nm, using antioxidation complex of Re(S2CNEt2)3(Phen) as thermal decomposition molecular precursor, organic compound with high boiling point as solvent and amphoteric polymer containing functional groups for connecting biomolecular as surfactant.The core-shell structure is used to increase the luminous efficiency and improve the optical performance. Through the comparative study with β-NaYF4:Yb,Er/Tm upconversion fluorescent probe in biological imaging, it is expected to provide a new way for improving the low quantum yield of the current upconversion fluorescence probe.
英文关键词: upconversion;nanoparticles;oxysulfide;one-pot synthesis