Infrared photodissociation spectroscopy of cold cationic trimethylamine complexes†,Physical Chemistry Chemical Physics

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Infrared photodissociation spectroscopy of cold cationic trimethylamine complexes†
Physical Chemistry Chemical Physics ( IF 2.9 ) Pub Date : 2018-07-04 00:00:00 , DOI: 10.1039/c8cp03672a
Xin Lei _{1,

2,

3,

4,

5} , Xiangtao Kong _{1,

2,

3,

4,

5} , Zhi Zhao _{1,

2,

3,

4,

5} , Bingbing Zhang _{1,

2,

3,

4,

5} , Dongxu Dai _{1,

2,

3,

4,

5} , Xueming Yang _{1,

2,

3,

4,

5} , Ling Jiang _{1,

2,

3,

4,

5}

Affiliation

Cryogenic ion-trap infrared photodissociation spectroscopy combined with a dielectric barrier discharge source was constructed to establish the general trends in the stepwise growth motif of trimethylamine (TMA)_n⁺ complexes. The results showed a strong preference for the formation of a stable charge-shared N⋯N type (TMA)₂⁺ ion core over the proton-transferred C⋯HN type ion core, evidencing that the source condition has a remarkable effect on the kinetic stability of isomers. A maximum of four TMA molecules are located perpendicularly to the N⋯N axis of the charge-shared (TMA)₂⁺ ion core. In the n = 7 and 8 clusters, the subsequent two TMA molecules are located at each end of the N⋯N axis of the (TMA)₂⁺ ion core, completing the first coordination shell. Starting at n = 9, the additional TMA molecules form a second solvation shell, and the cluster spectra show similarities to the solution phase spectrum of aqueous TMA.

中文翻译：

阳离子三甲胺冷配合物的红外光解离光谱†

构造了低温离子阱红外光解离光谱结合介电势垒放电源，以建立三甲胺（TMA）_n⁺配合物逐步生长基序的一般趋势。结果表明，相比于质子转移的C⋯HN型离子核，更倾向于形成稳定的电荷共享N⋯N型（TMA）₂⁺离子核，这证明了源条件对动力学有显着影响。异构体的稳定性。最多四个TMA分子垂直于电荷共享（TMA）₂⁺离子核的N⋯N轴定位。在n= 7和8个簇，随后的两个TMA分子位于（TMA）₂⁺离子核的N⋯N轴的每个末端，从而完成了第一个配位壳。从n = 9开始，其他TMA分子形成第二个溶剂化壳，簇光谱显示与TMA水溶液的溶液相光谱相似。

更新日期：2018-07-04

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