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Infrared photodissociation spectroscopy of ion-radical networks in cationic dimethylamine complexes

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Abstract

Infrared photodissociation spectroscopy was employed to establish the general trends in the stepwise growth motif of cationic dimethylamine (DMA)n+ (n = 4–13) complexes. Electronic structure calculations were performed to identify the structure of the low-lying isomers and to assign the observed spectral features. The results showed the preference of the formation of the proton-transferred (CH3)2NH2+ ion core. The (CH3)2NH2+–[(CH3)2N] ion-radical pair contact and the ion-radical separated pair could coexist at n = 4. The [(CH3)2N] radical is separated from the (CH3)2NH2+ ion core by one DMA molecule at n = 4–6 and by two or more DMA molecules in the larger clusters. This suggests that the (CH3)2NH2+–[(CH3)2N] ion-radical contact pair is not stable in the subsequent radiation-induced processes of DMA, and the [(CH3)2N] radical is released from the charged site in the cationic DMA networks.

Graphical abstract: Infrared photodissociation spectroscopy of ion-radical networks in cationic dimethylamine complexes

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Publication details

The article was received on 04 Sep 2018, accepted on 22 Oct 2018 and first published on 23 Oct 2018


Article type: Paper
DOI: 10.1039/C8CP05597A
Citation: Phys. Chem. Chem. Phys., 2018, Advance Article
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    Infrared photodissociation spectroscopy of ion-radical networks in cationic dimethylamine complexes

    X. Lei, X. Kong, Z. Zhao, B. Zhang, D. Dai, X. Yang and L. Jiang, Phys. Chem. Chem. Phys., 2018, Advance Article , DOI: 10.1039/C8CP05597A

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