Novel synthesis of β-cyclodextrin functionalized CdTe quantum dots as luminescent probes

被引：14
作者：
Chen, Xiao-Feng [1 ,2 ]
Zhou, Min [1 ,2 ]
Chang, Yan-Ping [1 ,2 ]
Ren, Cui-Ling [1 ,2 ,3 ]
Chen, Hong-Li [1 ,2 ,3 ]
Chen, Xing-Guo [1 ,2 ,3 ]
机构：
[1] Lanzhou Univ, State Key Lab Appl Organ Chem, Lanzhou 730000, Peoples R China
[2] Lanzhou Univ, Dept Chem, Lanzhou 730000, Peoples R China
[3] Key Lab Nonferrous Met Chem & Resources Utilizat, Lanzhou 730000, Peoples R China
来源：
APPLIED SURFACE SCIENCE | 2012年 / 263卷
关键词：
CdTe quantum dots; beta-cyclodextrin; Fluorescence; Molecular recognition; MAGNETIC NANOPARTICLES; ENERGY-TRANSFER; NANOCRYSTALS; WATER; COMPLEXATION; ENANTIOMERS; PESTICIDES; GLUCOSE; PHASE;
D O I：
10.1016/j.apsusc.2012.09.090
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A novel, inexpensive procedure for the preparation of highly fluorescent and water-soluble CdTe quantum dots (QDs) using beta-cyclodextrin (beta-CD) as surface-coating agents was fabricated through the substitution reaction at the C-6 position of mono-6-deoxy-6-(p-tolylsulfonyl)-cyclodextrin (6-TsO-beta-CD) by the-NH2 of (3-aminopropyl)triethoxysilane-coated CdTe QDs (APTES/CdTe QDs) under mild conditions. X-ray powder diffraction (XRD), Fourier transform infrared spectra (FT-IR), transmission electron microscopy (TEM), high-resolution TEM (HRTEM), ultraviolet and visible (UV-vis) spectrophotometer, and fluorescence (FL) spectrophotometer were used to characterize the obtained nanoparticles, which proved that the CdTe QDs have been effectively modified by beta-CD. The quantum yields (QYs) of CdTe QDs, APTES/CdTe QDs and beta-CD/APTES/CdTe QDs in water comparative to Rhodamine 6G were about 17%, 12%, and 9%, respectively. A pair of isomer o,p'-DDT and p,p'-DDT was chosen as the template molecules to evaluate the molecular recognition properties of beta-CD/APTES/CdTe QDs. The results revealed that beta-CD/APTES/CdTe QDs simultaneously possessed unique optical properties of QDs and excellent molecules recognition ability of beta-CD through combining their individual distinct advantages. (C) 2012 Elsevier B. V. All rights reserved.
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收藏
页码：491 / 496
页数：6
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