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首页> 外文期刊>Physical chemistry chemical physics: PCCP >Contribution of hydrogen bonding to charge-transfer induced surface-enhanced Raman scattering of an intermolecular system comprising p-aminothiophenol and benzoic acid
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Contribution of hydrogen bonding to charge-transfer induced surface-enhanced Raman scattering of an intermolecular system comprising p-aminothiophenol and benzoic acid

机译：氢键与电荷转移的贡献诱导的含有对氨基酚苯酚和苯甲酸的分子间系统的表面增强拉曼散射

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摘要

We investigated the influence of hydrogen bonds (H-bonds) on the intermolecular interactions of a system comprising p-aminothiophenol (PATP) and benzoic acid (BA) using surface-enhanced Raman scattering (SERS) for the first time. In this system, H-bonds form through intermolecular interactions between the -NH2 and -COOH groups and promote the charge-transfer (CT) transition from the Ag substrate to the adsorbed PATP molecules. Accordingly, the intensities of the non-totally symmetric vibrations (the b2-type bands) of PATP are influenced through the Herzberg-Teller contribution. This is clearly a BA concentration-dependent phenomenon. This behaviour can be attributed to an increase in the degree of conjugation of the system, which facilitates the CT process in the system with H-bonds. Furthermore, temperature-dependent SERS experiments and their two-dimensional (2D) correlation analysis confirmed that the formation of H-bonds facilitated the CT transition between the adsorbed molecules and substrate. The degree of CT was reduced by H-bond breakage that occurred with increasing temperature. An additional SERS experiment involving substituted BA molecules yielded similar conclusions.
机译：我们研究了第一次使用表面增强的拉曼散射（SERS）对包含对氨噻吩（Patp）和苯甲酸（Ba）的系统的分子间相互作用的影响。在该系统中，通过-N2和-COOH基团之间的分子间相互作用形成H键，并促进从Ag底物到吸附的PatP分子的电荷转移（CT）转变。因此，PATP的非完全对称振动（B2型带）的强度受到赫尔兹伯格替代贡献的影响。这显然是BA浓度依赖的现象。这种行为可以归因于系统的共轭程度的增加，这有利于系统中的CT过程与H键。此外，温度依赖性SERS实验及其二维（2D）相关分析证实H键的形成促进了吸附分子和基材之间的CT转变。通过增加温度的H键破裂减少CT的程度。涉及取代的BA分子的另外的SERS实验产生了类似的结论。

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    Yue Wang; Wei Ji; Zhi Yu;

  • 作者单位

    State Key Laboratory of Supramolecular Structure and Materials Jilin University Changchun 130012 P. R. China.;

    Department of Chemistry School of Science and Technology Kwansei Gakuin University Sanda Hyogo 669-1337 Japan;

    State Key Laboratory of Supramolecular Structure and Materials Jilin University Changchun 130012 P. R. China.;

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  • 正文语种 eng
  • 中图分类 物理学;化学;
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