| Cadion 1B对CdTe量子点光谱性质的影响 |
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| 引用本文： | 文立群,周兴旺,吕鉴泉. Cadion 1B对CdTe量子点光谱性质的影响[J]. 中国化学, 2008, 26(8): 1411-1416. DOI: 10.1002/cjoc.200890257 |
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| 作者姓名： | 文立群 周兴旺 吕鉴泉 |
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| 作者单位： | 1湖北师范学院生化分析技术湖北省重点实验室，湖北，黄石435002； ;2华中师范大学化学学院，湖北，武汉430079 ; |
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| 摘 要： | 本文研究了水溶液中镉试剂1B对巯基乙酸稳定下CdTe量子点(CdTe QD)荧光和紫外吸收光谱的影响，文中分别考察了表面活性剂、缓冲介质、镉试剂2B用量、pH以及温度的影响。结果表明：镉试剂1B作用于CdTe QD后产生新的可见光谱吸收峰，并对CdTe QD的荧光有猝灭作用，同时借它们之间的作用可实现镉试剂1B对CdTe QD的包覆，表观平衡常数为1.095×106mol·L-1，表面覆盖率达45%。热力学结果显示，镉试剂1B与CdTe QD的作用是一个自发的、熵驱动的过程，其作用力主要表现为静电作用。
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| 关 键 词： | 相互作用 光谱 碲化镉 量子点 镉试剂1B |
| 收稿时间： | 2008-01-20 |
| 修稿时间： | 2008-03-13 |
Effect of Cadion 1B on the Spectrum of Mercaptoacetic Acid‐stabilized CdTe Quantum Dots |
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| Li‐Qun WEN,Xing‐Wang ZHOU,Jian‐Quan LÜ. Effect of Cadion 1B on the Spectrum of Mercaptoacetic Acid‐stabilized CdTe Quantum Dots[J]. Chinese Journal of Chemistry, 2008, 26(8): 1411-1416. DOI: 10.1002/cjoc.200890257 |
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| Authors: | Li‐Qun WEN Xing‐Wang ZHOU Jian‐Quan LÜ |
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| Affiliation: | 1. Hubei Key Laboratory of Bioanalytical Technique, Hubei Normal University, Huangshi, Hubei 435002, China;2. College of Chemistry, Central China Normal University, Wuhan, Hubei 430079, China;3. Fax: 0086‐0714‐6531032 |
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| Abstract: | The effect of cadion 1B (4‐nitro‐benzene‐diazo‐amino‐azobenzene) on the fluorescent and absorption spectroscopy of mercaptoacetic acid‐stabilized CdTe quantum dots (CdTe QD) in aqueous media was studied. Surfactant, medium, dosages of the cadion 1B, pH and thermodynamics parameters were also examined. The experimental results showed that when cadion 1B was added into the CdTe QD solution, a new absorption peak was observed, and the fluorescence of CdTe QD was quenched to some extent, suggesting that there exist an interaction between cadion 1B and CdTe QD. The apparent equilibrium constant at room temperature was calculated to be 1.095×106 L·mol?1, and the coverage ratio of cadion 1B on the surface of CdTe QD was estimated as 45%. Thermodynamic calculations revealed that the interaction was a spontaneous process in which electrostatic interactions play a major role. |
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| Keywords: | interaction spectroscopy CdTe quantum dot cadion 1B |
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