文献类型：期刊文献

英文题名：Bifunctional Multidentate Ligand Modified Highly Stable Water-Soluble Quantum Dots

作者：Liu, Lu;Guo, Xuhong;Li, Yan[1];Zhong, Xinhua

机构：[1]E China Univ Sci & Technol, Dept Chem, Key Lab Adv Mat, Shanghai 200237, Peoples R China; E China Univ Sci & Technol, Sch Chem Engn, Shanghai 200237, Peoples R China

年份：2010

卷号：49

期号：8

起止页码：3768

外文期刊名：INORGANIC CHEMISTRY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000276556900031)】；

基金：We thank the National Natural Science Foundation of China (nos. 20501005 and 20771037), the Program for New Century Excellent Talents in the University of China (NCET-06-0417), the Pujiang Talents Project (07pj14032), the Shuguang Project (06SG33), SRFDP (20070251014), and the Program for Professor of Special Appointment at Shanghai Institutions of Higher Learning for financial support.

语种：英文

摘要：We have designed and synthesized a multidentate polymer ligand used for vvater-solubilization of luminescent quantum dots (QDs). The synthesis of the multidentate ligand (PAA-g-MEA) was based on several thiol groups grafted to a linear polymer chain through a simple carboxy-amine coupling reaction between poly(acryl acid) (PAA) and mercaptoethylamine (MEA). Water-soluble ODs capped with these PAA-g-MEA ligands were prepared via ligand exchange from the original hydrophobic ones. The resulting FAA-g-MEA capped water-soluble QDs with relatively small hydrodynamic diameters possess higher photoluminescence quantum yields than the initial hydrophobic ODs, extraordinary stability over extended periods of time and over a broad pH range (3-14), salt concentrations (up to saturated NaCl solution), and thermal treatment at 100 degrees C.