Microwave Synthesis of CdTe/TGA Quantum Dots and Their Thermodynamic Interaction with Bovine Serum Albumin
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2016年第6期
论文作者：丁玲 PENG Zeze SHEN Weizhou LIU Tao CHENG Zhengzai GAUTHIER Mario 梁峰
文章页码：1408 - 1414
摘 要：The thioglycollic acid（TGA） as a capping agent, CdTe/TGA quantum dots（QDs） with excellent properties were synthesized under microwave irradiation. The TGA/Cd/Te molar ratios, reaction time, temperature and p H are the crucial factors for properties of QDs. The QDs were characterized by UVvis absorption and fluorescence spectra, transmission electron microscopy and Fourier transform infrared spectroscopy. The experimental results show that when the p H value is 11.5 and molar ratio of TGA:Cd:Te is 1.2:1:0.4 at 100 ℃ heating for 15 min, the resulted QDs exhibit a high fluorescence quantum yield of 78%. The fluorescence full width at half maximum（FHMW） of QDs is around 23 nm. The products are spherical with average size of 3-5 nm. There is a strong coordination effect between TGA and Cd2+. Moreover, the results of interaction between as-made QDs and bovine serum albumin（BSA） suggest that the QDs-BSA binding reaction is a static quenching. The negative values of free energy（△G<0） suggest that the binding process is spontaneous, △H<0 and △S<0 show that hydrogen bonds and van der Waals interactions play a major role in the binding reaction between QDs and BSA.
丁玲1，PENG Zeze1，SHEN Weizhou2，LIU Tao1，CHENG Zhengzai1，GAUTHIER Mario1,3，梁峰1
1. School of Chemistry and Chemical Engineering,Coal Conversion and New Carbon Materials Hubei Key Laboratory,Wuhan University of Science and Technology2. School of Electrical and Eletronic Engineering,Huazhong University of Science and Technology3. Department of Chemistry,University of Waterloo
摘 要：The thioglycollic acid（TGA） as a capping agent, CdTe/TGA quantum dots（QDs） with excellent properties were synthesized under microwave irradiation. The TGA/Cd/Te molar ratios, reaction time, temperature and p H are the crucial factors for properties of QDs. The QDs were characterized by UVvis absorption and fluorescence spectra, transmission electron microscopy and Fourier transform infrared spectroscopy. The experimental results show that when the p H value is 11.5 and molar ratio of TGA:Cd:Te is 1.2:1:0.4 at 100 ℃ heating for 15 min, the resulted QDs exhibit a high fluorescence quantum yield of 78%. The fluorescence full width at half maximum（FHMW） of QDs is around 23 nm. The products are spherical with average size of 3-5 nm. There is a strong coordination effect between TGA and Cd2+. Moreover, the results of interaction between as-made QDs and bovine serum albumin（BSA） suggest that the QDs-BSA binding reaction is a static quenching. The negative values of free energy（△G<0） suggest that the binding process is spontaneous, △H<0 and △S<0 show that hydrogen bonds and van der Waals interactions play a major role in the binding reaction between QDs and BSA.
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