Ultrafast deactivation mechanisms of protonated aromatic amino acids following UV excitation
Deactivation pathways of electronically excited states have been investigated in three protonated aromatic amino acids: tryptophan (Trp), tyrosine (Tyr) and phenylalanine (Phe). The protonated amino acids were generated by electrospray and excited with a 266 nm femtosecond laser, the subsequent deca...
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| Veröffentlicht in: | Physical chemistry chemical physics : PCCP 2005-01, Vol.7 (2), p.394-398 |
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| container_end_page | 398 |
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| container_issue | 2 |
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| container_title | Physical chemistry chemical physics : PCCP |
| container_volume | 7 |
| creator | RANG, H JOUVET, C DEDONDER-LARDEUX, C MARTRENCHARD, S GREGOIRE, G DESFRANCOIS, C SCHERMANN, J.-P BARAT, M FAYETON, J. A |
| description | Deactivation pathways of electronically excited states have been investigated in three protonated aromatic amino acids: tryptophan (Trp), tyrosine (Tyr) and phenylalanine (Phe). The protonated amino acids were generated by electrospray and excited with a 266 nm femtosecond laser, the subsequent decay of the excited states being monitored through fragmentation of the ions induced and/or enhanced by another femtosecond pulse at 800 nm. The excited state of TrpH+ decays in 380 fs and gives rise to two channels: hydrogen atom dissociation or internal conversion (IC). In TyrH, the decay is slowed down to 22.3 ps and the fragmentation efficiency of PheH+ is so low that the decay cannot be measured with the available laser. The variation of the excited state lifetime between TrpH+ and TyrH+ can be ascribed to energy differences between the dissociative pi sigma* state and the initially excited pi pi* state. |
| doi_str_mv | 10.1039/b414986f |
| format | Article |
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The variation of the excited state lifetime between TrpH+ and TyrH+ can be ascribed to energy differences between the dissociative pi sigma* state and the initially excited pi pi* state.</description><identifier>ISSN: 1463-9076</identifier><identifier>EISSN: 1463-9084</identifier><identifier>DOI: 10.1039/b414986f</identifier><identifier>PMID: 19785164</identifier><language>eng</language><publisher>Cambridge: Royal Society of Chemistry</publisher><subject>Amino Acids, Aromatic - chemistry ; Chemistry ; Exact sciences and technology ; General and physical chemistry ; Hydrogen - chemistry ; Kinetics ; Mass Spectrometry ; Models, Molecular ; Protons ; Tryptophan - chemistry ; Tyrosine - chemistry ; Ultraviolet Rays</subject><ispartof>Physical chemistry chemical physics : PCCP, 2005-01, Vol.7 (2), p.394-398</ispartof><rights>2005 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c397t-6e3bc4bb970bcbe822fec1c545e3bb392ee8020ed566198a679464aa5e791c303</citedby><cites>FETCH-LOGICAL-c397t-6e3bc4bb970bcbe822fec1c545e3bb392ee8020ed566198a679464aa5e791c303</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,777,781,2818,27905,27906</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=16466256$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/19785164$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>RANG, H</creatorcontrib><creatorcontrib>JOUVET, C</creatorcontrib><creatorcontrib>DEDONDER-LARDEUX, C</creatorcontrib><creatorcontrib>MARTRENCHARD, S</creatorcontrib><creatorcontrib>GREGOIRE, G</creatorcontrib><creatorcontrib>DESFRANCOIS, C</creatorcontrib><creatorcontrib>SCHERMANN, J.-P</creatorcontrib><creatorcontrib>BARAT, M</creatorcontrib><creatorcontrib>FAYETON, J. A</creatorcontrib><title>Ultrafast deactivation mechanisms of protonated aromatic amino acids following UV excitation</title><title>Physical chemistry chemical physics : PCCP</title><addtitle>Phys Chem Chem Phys</addtitle><description>Deactivation pathways of electronically excited states have been investigated in three protonated aromatic amino acids: tryptophan (Trp), tyrosine (Tyr) and phenylalanine (Phe). The protonated amino acids were generated by electrospray and excited with a 266 nm femtosecond laser, the subsequent decay of the excited states being monitored through fragmentation of the ions induced and/or enhanced by another femtosecond pulse at 800 nm. The excited state of TrpH+ decays in 380 fs and gives rise to two channels: hydrogen atom dissociation or internal conversion (IC). In TyrH, the decay is slowed down to 22.3 ps and the fragmentation efficiency of PheH+ is so low that the decay cannot be measured with the available laser. The variation of the excited state lifetime between TrpH+ and TyrH+ can be ascribed to energy differences between the dissociative pi sigma* state and the initially excited pi pi* state.</description><subject>Amino Acids, Aromatic - chemistry</subject><subject>Chemistry</subject><subject>Exact sciences and technology</subject><subject>General and physical chemistry</subject><subject>Hydrogen - chemistry</subject><subject>Kinetics</subject><subject>Mass Spectrometry</subject><subject>Models, Molecular</subject><subject>Protons</subject><subject>Tryptophan - chemistry</subject><subject>Tyrosine - chemistry</subject><subject>Ultraviolet Rays</subject><issn>1463-9076</issn><issn>1463-9084</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2005</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNpF0E1LxDAQBuAgiruugr9AclG8VJMmTZujLq4KC15cT0KZplONtM2aZP3491Z3cU8zMA8vw0vIMWcXnAl9WUkudaGaHTLmUolEs0Lu_u-5GpGDEN4YYzzjYp-MuM6LjCs5Js-LNnpoIERaI5hoPyBa19MOzSv0NnSBuoYuvYuuh4g1Be-6gRgKne0dBWPrQBvXtu7T9i908UTxy9j4l3JI9hpoAx5t5oQsZjeP07tk_nB7P72aJ0boPCYKRWVkVemcVabCIk0bNNxkMhsOldApYsFShnWmFNcFqFxLJQEyzDU3gokJOVvnDn--rzDEsrPBYNtCj24VSpWrVKRaDPB8DY13IXhsyqW3HfjvkrPyt8nyet3kbKAnm8xV1WG9hZvqBnC6ARAMtI2H3tiwdUoqlWZK_ADjh3ws</recordid><startdate>20050101</startdate><enddate>20050101</enddate><creator>RANG, H</creator><creator>JOUVET, C</creator><creator>DEDONDER-LARDEUX, C</creator><creator>MARTRENCHARD, S</creator><creator>GREGOIRE, G</creator><creator>DESFRANCOIS, C</creator><creator>SCHERMANN, J.-P</creator><creator>BARAT, M</creator><creator>FAYETON, J. 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A</creatorcontrib><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Physical chemistry chemical physics : PCCP</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>RANG, H</au><au>JOUVET, C</au><au>DEDONDER-LARDEUX, C</au><au>MARTRENCHARD, S</au><au>GREGOIRE, G</au><au>DESFRANCOIS, C</au><au>SCHERMANN, J.-P</au><au>BARAT, M</au><au>FAYETON, J. A</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Ultrafast deactivation mechanisms of protonated aromatic amino acids following UV excitation</atitle><jtitle>Physical chemistry chemical physics : PCCP</jtitle><addtitle>Phys Chem Chem Phys</addtitle><date>2005-01-01</date><risdate>2005</risdate><volume>7</volume><issue>2</issue><spage>394</spage><epage>398</epage><pages>394-398</pages><issn>1463-9076</issn><eissn>1463-9084</eissn><abstract>Deactivation pathways of electronically excited states have been investigated in three protonated aromatic amino acids: tryptophan (Trp), tyrosine (Tyr) and phenylalanine (Phe). The protonated amino acids were generated by electrospray and excited with a 266 nm femtosecond laser, the subsequent decay of the excited states being monitored through fragmentation of the ions induced and/or enhanced by another femtosecond pulse at 800 nm. The excited state of TrpH+ decays in 380 fs and gives rise to two channels: hydrogen atom dissociation or internal conversion (IC). In TyrH, the decay is slowed down to 22.3 ps and the fragmentation efficiency of PheH+ is so low that the decay cannot be measured with the available laser. The variation of the excited state lifetime between TrpH+ and TyrH+ can be ascribed to energy differences between the dissociative pi sigma* state and the initially excited pi pi* state.</abstract><cop>Cambridge</cop><pub>Royal Society of Chemistry</pub><pmid>19785164</pmid><doi>10.1039/b414986f</doi><tpages>5</tpages></addata></record> |
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| source | MEDLINE; Royal Society of Chemistry Journals Archive (1841-2007); Royal Society Of Chemistry Journals 2008-; Alma/SFX Local Collection |
| subjects | Amino Acids, Aromatic - chemistry Chemistry Exact sciences and technology General and physical chemistry Hydrogen - chemistry Kinetics Mass Spectrometry Models, Molecular Protons Tryptophan - chemistry Tyrosine - chemistry Ultraviolet Rays |
| title | Ultrafast deactivation mechanisms of protonated aromatic amino acids following UV excitation |
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