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dc.contributor.authorBeckstead, Ashley A.
dc.contributor.authorZhang, Yuyan
dc.contributor.authorHilmer, Jonathan K.
dc.contributor.authorSmith, Heidi J.
dc.contributor.authorBermel, Emily
dc.contributor.authorForeman, Christine M.
dc.contributor.authorKohler, Bern
dc.date.accessioned2017-10-09T22:51:08Z
dc.date.available2017-10-09T22:51:08Z
dc.date.issued2017-08
dc.identifier.citationBeckstead, Ashley A., Yuyuan Zhang, Jonathan K. Hilmer, Heidi J. Smith, Emily Bermel, Christine M. Foreman, and Bern Kohler. “Ultrafast Excited-State Deactivation of the Bacterial Pigment Violacein.” Journal of Physical Chemistry A (July 28, 2017). doi:10.1021/acs.jpca.7b05769.en_US
dc.identifier.issn1089-5639
dc.identifier.urihttps://scholarworks.montana.edu/xmlui/handle/1/13805
dc.description.abstractThe photophysical properties of the natural pigment violacein extracted from an Antarctic organism adapted to high exposure levels of UV radiation were measured in a combined steady-state and time-resolved spectroscopic study for the first time. In the low-viscosity solvents methanol and acetone, violacein exhibits low fluorescence quantum yields on the order of 1 x 10(-4), and femtosecond transient absorption measurements reveal excited-state lifetimes of 3.2 +/- 0.2 and 4.6 +/- 0.2 ps in methanol and acetone, respectively. As solvent viscosity is increased, both the fluorescence quantum yield and excited-state lifetime of this intensely colored pigment increase dramatically, and stimulated emission decays 30-fold more slowly in glycerol than in methanol at room temperature. Excited-state deactivation is suggested to occur via a molecular-rotor mechanism in which torsion interring bond leads to a conical intersection with the ground state.en_US
dc.titleUltrafast Excited-State Deactivation of the Bacterial Pigment Violaceinen_US
dc.typeArticleen_US
mus.citation.extentfirstpage7855en_US
mus.citation.extentlastpage7861en_US
mus.citation.issue33en_US
mus.citation.journaltitleJournal of Physical Chemistry Aen_US
mus.citation.volume121en_US
mus.identifier.categoryEngineering & Computer Scienceen_US
mus.identifier.doi10.1021/acs.jpcb.7b05769en_US
mus.relation.collegeCollege of Engineeringen_US
mus.relation.departmentCenter for Biofilm Engineering.en_US
mus.relation.departmentChemical & Biological Engineering.en_US
mus.relation.departmentChemical Engineering.en_US
mus.relation.universityMontana State University - Bozemanen_US
mus.relation.researchgroupCenter for Biofilm Engineering.en_US
mus.data.thumbpage1en_US
mus.contributor.orcidKohler, Bern|0000-0001-5353-1655en_US
mus.contributor.orcidForeman, Christine M.|0000-0003-0230-4692en_US


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