物理化学学报 >> 2007, Vol. 23 >> Issue (09): 1478-1482.doi: 10.3866/PKU.WHXB20070933

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亮氨酸与异亮氨酸在金/银核-壳复合纳米粒子上的吸附状态

周光明; 虞丹尼; 黎司; 杨大成   

  1. 西南大学化学化工学院, 重庆 400715
  • 收稿日期:2007-02-12 修回日期:2007-03-20 发布日期:2007-09-06
  • 通讯作者: 周光明 E-mail:gmzhou@swu.edu.cn

Adsorption of Leucine and Isoleucine on Core-Shell Au/Ag Nanoparticles

ZHOU Guang-Ming; YU Dan-Ni; LI Si; YANG Da-Cheng   

  1. School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, P. R. China
  • Received:2007-02-12 Revised:2007-03-20 Published:2007-09-06
  • Contact: ZHOU Guang-Ming E-mail:gmzhou@swu.edu.cn

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摘要： 研究了亮氨酸和异亮氨酸的拉曼光谱及其在金/银核-壳复合纳米粒子上的表面增强拉曼光谱(SERS); 归属、分析了不同振动模式引起的振动峰位变化. 拉曼光谱中, 亮氨酸的甲基摇摆(ω(CH3)) 拉曼位移为962, 945, 924 cm-1, 甲基变形(δas(CH3)) 为1454, 1408, cm-1, 异亮氨酸的分别为922 cm-1和1448, 1420, 1394 cm-1. 在酸性和碱性条件下不同浓度的SERS中, 各对应基团振动峰位差异更明显. 初步阐述了亮氨酸与异亮氨酸浓度与SERS关系, 并推测了在金/银核-壳复合粒子表面的吸附模型.

关键词: 亮氨酸, 异亮氨酸, 表面增强拉曼光谱, 金/银核-壳复合纳米粒子

Abstract: The Raman spectra and Surface enhanced Raman spectra (SERS) of leucine and isoleucine adsorbed on core-shell Au/Ag nanoparticles were obtained and assigned, and the different Raman peaks resulting from different vibrational models of the isomers忆groups were analysed. In Raman spectra, the leucine’s (ω(CH3)) is at 962, 945, 924 cm-1, (δas(CH3)) at 1408, 1454 cm-1; corresponding values for isoleucine are, 922 cm-1 and 1448, 1420, 1394 cm-1, respectwely. The difference in the peak positions of corresponding groups between leucine and isoleucine is more apparent in the SERS at acidic and basic conditions. The relationship between leucine and isoleucine’s concentration and SERS was interpreted preliminarily and the adsorption model on the core-shell Au/Ag nanoparticle surface was speculated.

Key words: Leucine, Isoleucine, SERS, Core-shell Au/Ag nanoparticle

MSC2000: 

  • O647