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http://repository.aaup.edu/jspui/handle/123456789/31
Title: | Excited State Dynamics of Isocytosine; a Hybrid Case of Canonical Nucleobase Photodynamics |
Authors: | jacob berenbeim, $Other$Other samuel boldissar, $Other$Other faady siouri, $AAUP$Palestinian gregory gate, $AAUP$Other michael r. haggmark, $Other$Other briana aboulache, $Other$Other trevor cohen, $Other$Other mattanjah de vries, $Other$Other |
Issue Date: | 6-Oct-2017 |
Publisher: | The Journal of Physical Chemistry Letter |
Abstract: | We present resonant two-photon ionization (R2PI) spectra of isocytosine (isoC) and pump–probe results on two of its tautomers. IsoC is one of a handful of alternative bases that have been proposed in scenarios of prebiotic chemistry. It is structurally similar to both cytosine (C) and guanine (G). We compare the excited-state dynamics with the Watson–Crick (WC) C and G tautomeric forms. These results suggest that the excited-state dynamics of WC form of G may primarily depend on the heterocyclic substructure of the pyrimidine moiety, which is chemically identical to isoC. For WC isoC we find a single excited-state decay with a rate of ?1010 s–1, while the enol form has multiple decay rates, the fastest of which is 7 times slower than for WC isoC. The excited-state dynamics of isoC exhibits striking similarities with that of G, more so than with the photodynamics of C. |
URI: | http://repository.aaup.edu/jspui/handle/123456789/31 |
Appears in Collections: | Faculty & Staff Scientific Research publications |
Files in This Item:
File | Description | Size | Format | |
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Excited-State Dynamics of Isocytosine, A Hybrid Case of Canonical Nucleobase Photodynamics.pdf | 1.9 MB | Adobe PDF | View/Open |
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