Hydrogen bonds in mixed-solvent Au-(CH3OH)(H2O) complex: A joint experimental and theoretical study

Hydrogen bonds in mixed-solvent Au-(CH3OH)(H2O) complex: A joint experimental and theoretical study
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混合溶剂 Au-(CH3OH)(H2O) 络合物中的氢键:联合实验和理论研究

DOI:
10.1016/j.cplett.2022.139854
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发表时间:
2022-09
影响因子:
2.8
通讯作者:
Xianfeng Zheng
Xianfeng Zheng
中科院分区:
化学4区
文献类型:
--
作者:
Zhengbo Qin;Qiaolin Wang;Lihe Xu;Wenjing Lv;Xianfeng Zheng

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与Au-(H_2O)_2和Au-(CH_3OH)_2配合物不同,Au-(CH_3OH)(H_2O)配合物包含两个稳定的异构体Iso-a和Iso-b。实验和理论证据表明,Iso-a异构体是光谱带的主要贡献,Iso-b由于其高能量而可以忽略不计。· Au-(CH_3OH)(H_2O)配合物有两个稳定的低能异构体Iso-a和Iso-b。·Au-(CH_3OH)(H_2 O)配合物的Iso-α形成六元环HB结构。·Iso-b的贡献在实验中可以忽略不计,因为它的能量很高。与传统氢键相比,非传统氢键近年来受到越来越多的关注。本文首次采用气相负离子光电子速度成像结合量子化学计算研究了混合溶剂Au -(CH 3 OH)(H2 O)配合物中的氢键。测定了Au -(CH 3OH)(H2O)络合物的垂直脱离能为3.22 ± 0.02eV.计算结果表明,这些混合溶剂溶剂化的配合物有两个稳定的低能异构体:Iso-a和Iso-b。并将实验光谱归因于Iso-α异构体的贡献。详细的氢键模式已被发现的两种异构体。
In contrast to Au-(H2O)2 and Au-(CH3OH)2 complexes, Au-(CH3OH)(H2O) complex involves two stable isomers, Iso-a and Iso-b . Experimental and theoretical evidences suggest Iso-a isomer is a major contribution to the spectral band and Iso-b is negligible due to its high energy. • Au-(CH3OH)(H2O) complex has two stable low-energy isomers, Iso-a and Iso-b . • The Iso-a of Au-(CH3OH)(H2O) complex forms a six-membered ring HB structure. • The contribution of Iso-b is negligible in experiment due to its high energy. Compared to the conventional hydrogen bonds, nonconventional hydrogen bonds have gained increasing interest in recent years. In this work, we firstly investigate hydrogen bonds in mixed-solvent Au - (CH 3 OH)(H 2 O) complex via gas phase anion photoelectron velocity map imaging associated with quantum chemical calculations. The vertical detachment energy of Au - (CH 3 OH)(H 2 O) complex is determined as 3.22 ± 0.02 eV. The calculations reveal these mixed-solvent solvated complexes having two stable low-energy isomers: Iso-a and Iso-b . And the experimental spectrum is ascribed to the contribution from Iso-a isomer. Detailed hydrogen bonding patterns have been revealed for both isomers.
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