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Picosecond time-resolved infrared study of 2-aminopurine ionisation in solution

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Date

2007

Authors

Kuimova, Marina K
Gill, Peter
Lin, Ching-Yeh
Matousek, Pavel
Towrie, Michael
Sun, Xue Zhong
George, Michael W
Parker, Anthony W

Journal Title

Journal ISSN

Volume Title

Publisher

Royal Society of Chemistry

Abstract

Two photon ionisation of 2-aminopurine (2AP) has been monitored following 267 nm irradiation in neutral and acidic aqueous solutions using picosecond time-resolved infrared spectroscopy (ps-TRIR). The transient infrared spectra obtained in neutral and acidic conditions show significant differences that are consistent with the formation of different species, namely the 2AP radical cation, 2AP+•, in acidic conditions and the uncharged radical, 2AP•(-H+), in neutral conditions. The ps-TRIR data indicate that deprotonation of 2AP+• in neutral solution takes place within <2 ps following photoionisation. DFT calculations (EDF1/6-31+G*) were used to support the assignment of the intermediates observed in these spectroscopic experiments.

Description

Keywords

Keywords: 2 aminopurine; article; chemical structure; infrared spectroscopy; ionization; irradiation; light absorption; priority journal; proton nuclear magnetic resonance; proton transport; 2-Aminopurine; Ions; Kinetics; Molecular Structure; Solutions; Spectrophot

Citation

URI

http://hdl.handle.net/1885/31562

Collections

ANU Research Publications

Source

Photochemical and Photobiological Sciences

Type

Journal article

Book Title

Entity type

Access Statement

License Rights

DOI

10.1039/b705801b

Restricted until

2037-12-31

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01_Kuimova_Picosecond_time-resolved_2007.pdf (318.56 KB)

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