CdTe量子点制备及与七元瓜环的相互作用研究  

Preparation of CdTe QDs and Interaction with Cucurbit [7] urils

作　　者：李春荣[1] 胡先运[1] 王恒[1] 姜艳萍[1] 刘仕云[1] 孟铁宏[1] 陶晨[1] 任竹君[1] 罗亚男[1] LI Chun-rong;HU Xian-yun;WANG Heng;JIANG Yan-ping;LIU Shi-yun;MENG Tie-hong;TAO Chen;REN Zhu-jun;LUO Ya-nan(Qiannan Medical College for Nationalities, Duyun 558013, Guizhou)

机构地区：[1]黔南民族医学高等专科学校,贵州都匀558013

出　　处：《黔南民族医专学报》2019年第1期1-4,共4页Journal of Qiannan Medical College for Nationalities

基　　金：国家自然科学基金项目(81860317;21545006);贵州省自然科学基金项目(黔科合基础[2016]1136;黔科合基础[2019]1301);黔南州科技计划项目(黔南州科合社字[2016]1号;黔南州科合社字[2017]19号;黔南科合工字[2016]12号);黔南民族医学高等专科学校科研基金项目(QNYZ201605;QNYZ201706;QNYZ201801;QNYZ201807)

摘　　要：以半胱氨酸(L-Cys)为稳定剂,合成具有优异荧光性能的水溶性碲化镉量子点(CdTe QDs)。合成的CdTe QDs粒径主要分布在2.8 nm附近,大小均匀,基本呈规则的球形,分散性良好。对多基配体Q[7]具有良好的选择性、灵敏性和抗干扰能力。Q[7]浓度在10～40 mol/L范围内与CdTe QDs的荧光猝灭程度存在良好的线性关系,检出限为4.1 mol/L(S/N=3),据此可实现溶液中Q[7]高灵敏检测,为以多基配体瓜环作为CdTe QDs猝灭剂,构建荧光关-开荧光探针提供实验依据。Water-soluble CdTe Quantum dots with excellent optical performance were synthesized with L-cysteine as stabilizer. The synthesized CdTe QDs particle size was mainly distributed around 2.8 nm, with uniform size, regular spherical shape and good dispersion. It has good selective sensitivity and anti-interference ability for multi-ligand cucurbit[7]uril. Cucurbit[7]uril concentration in the range of 10-40 μmol/L has a good linear relationship with the fluorescence quenching degree of CdTe QDs, and the detection limit is 4.1 μmol/L when signal to noise ratio is 3, so cucurbit[7]uril in solution can be detected with high sensitivity. The results provide experimental basis for the construction of fluorescent closed-open fluorescent probes with multi-ligand cucurbit[n]uril as CdTe QDs quenching agent.

关 键 词：CDTE量子点 七元瓜环 相互作用 

分 类 号：O625[理学—有机化学]