| dc.contributor.author | KELLY, JOHN MOFFAT | |
| dc.contributor.author | QUINN, SUSAN | |
| dc.date.accessioned | 2013-08-12T11:43:48Z | |
| dc.date.available | 2013-08-12T11:43:48Z | |
| dc.date.issued | 2009 | |
| dc.date.submitted | 2009 | en |
| dc.identifier.citation | D. A. McGovern, G.W. Doorley, A. M. Whelan, A. W. Parker, M. Towrie, J. M. Kelly, and S. J. Quinn., A Study of the pH Dependence of Electronically Excited Guanosine Compounds by Picosecond Time-resolved Infrared Spectroscopy, Photochemical & Photobiological Sciences, 8, 2009, 542-548. | en |
| dc.identifier.other | Y | |
| dc.description | PUBLISHED | en |
| dc.description.abstract | The photophysical properties of 5?-guanosine monophosphate (5?-GMP) and polyguanylic acid
{poly(G)} in D2O solutions of varying pH have been studied using picosecond transient infrared
absorption spectroscopy. Whereas in neutral or weakly alkaline solution only the vibrationally excited
electronic ground state of 5?-GMP is observed, in acidic solution the relatively long-lived (229 ? 20 ps)
electronic excited state of protonated 5?-GMP, which possesses strong absorptions at 1517 and
1634 cm-1, could be detected. The picosecond transient behaviour of polyguanylic acid in acidic
solution is also very different from that of the polynucleotide in neutral solution due not only to the
protonation of guanine moieties yielding the protonated excited state but because of the disruption of
the guanine stacks which are present in the species in neutral solution. | en |
| dc.description.sponsorship | We are grateful to the EU access programme of the Rutherford
Appleton Laboratory (JMK) which allowed these measurements
to be made. We thank Dr Kate Ronayne for her help in making
these measurements. We acknowledge financial support from
Science Foundation Ireland (07/RFP/CHEF437). | en |
| dc.format.extent | 542-548. | en |
| dc.language.iso | en | en |
| dc.relation.ispartofseries | Photochemical & Photobiological Sciences; | |
| dc.relation.ispartofseries | 8; | |
| dc.rights | Y | en |
| dc.subject | photophysical properties of 5?-guanosine monophosphate (5?-GMP) | en |
| dc.subject.lcsh | photophysical properties of 5?-guanosine monophosphate (5?-GMP) | en |
| dc.title | A Study of the pH Dependence of Electronically Excited Guanosine Compounds by Picosecond Time-resolved Infrared Spectroscopy | en |
| dc.type | Journal Article | en |
| dc.type.supercollection | scholarly_publications | en |
| dc.type.supercollection | refereed_publications | en |
| dc.identifier.peoplefinderurl | http://people.tcd.ie/jmkelly | |
| dc.identifier.rssinternalid | 57641 | |
| dc.identifier.rssuri | http://www.rsc.org/ej/PP/2009/b817756b.pdf | en |
| dc.identifier.uri | http://hdl.handle.net/2262/66992 | |
