Modification of the optical spectrum of Cytosine by the formation of an ordered monolayer of molecules at a au(110)/electrolyte interface.

Modification of the optical spectrum of Cytosine by the formation of an ordered monolayer of molecules at a au(110)/electrolyte interface.
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通过在 au(110)/电解质界面形成有序单层分子来改变胞嘧啶的光谱。

DOI:
10.1002/cphc.201500014
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发表时间:
2015
期刊:
a European journal of chemical physics and physical chemistry
影响因子:
--
通讯作者:
Bowfield A
Bowfield A
中科院分区:
--
文献类型:
--
作者:
Bowfield A

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对吸附在Au(110)/电解质界面上的有序单层胞嘧啶的反射各向异性光谱(RAS)进行了分析,发现底物和胞嘧啶都有光学贡献。胞嘧啶在水环境中的光谱由于分子与Au之间的相互作用而显着拓宽(110)。金(110)/胞嘧啶界面由两个额外的分子跃迁组成,位于先前观察到的分子吸收带的中间,通过经验洛伦兹跃迁模型成功模拟,与先前的理论和实验研究一致。虽然这个分析本身不能确定π→π*偶极子跃迁的数量,但它证实了导致Au(110)/胞嘧啶界面光学响应的唯一胞嘧啶跃迁位于分子平面上,该平面与金表面垂直,沿1�1�0方向长轴。
An analysis of the reflection anisotropy spectrum (RAS) of an ordered monolayer of cytosine adsorbed at a Au (110)/electrolyte interface is found to contain optical contributions from both the substrate and the cytosine. The spectrum of cytosine in an aqueous environment is significantly broadened by the interaction between the molecule and the Au (110). Successful simulations of the Au (110)/cytosine interface consisting of two additional molecular transitions, which sit in the middle of previously observed molecular absorption bands, are produced by an empirical Lorentzian transition model that is consistent with previous theoretical and experimental studies. While this analysis alone cannot determine the number of π→ π* dipole transitions, it confirms that the only cytosine transitions that contribute to the optical response of the Au (110)/cytosine interface are located in the plane of the molecule, which is vertical to the gold surface with the long axis along the 1 ̄1 0 direction.
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