Linked Life Data

20541965

Source:http://linkedlifedata.com/resource/pubmed/id/20541965

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2010-7-12
pubmed:abstractText
The electronic transitions of the three alpha,alpha'-dihydroxy derivatives of anthraquinone, 1,4-dihydroxy-, 1,8-dihydroxy-, and 1,5-dihydroxy-9,10-anthraquinone (quinizarin, chrysazin, and anthrarufin), were investigated by synchrotron radiation linear dichroism (SRLD) spectroscopy on samples aligned in stretched polyethylene. With synchrotron radiation, polarization data could be determined in the UV region up to ca. 58,000 cm(-1) (7.2 eV), which amounts to an extension by ca. 11,000 cm(-1) (1.4 eV) relative to the range accessible with a conventional light source. Throughout the investigated region (15,000-58,000 cm(-1)), essentially similar wavenumbers, intensities, and transition moment directions were determined for chrysazin and anthrarufin, while the spectrum of quinizarin deviated significantly. The results of time-dependent density functional theory (TD-DFT) calculations were in good agreement with the experimental spectra, leading to the assignment of 10 electronic states for quinizarin, and 8 electronic states for chrysazin and anthrarufin. No evidence was found for contributions from different tautomeric or rotameric forms to the observed spectra.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
1873-3557
pubmed:author
pubmed:copyrightInfo
Copyright 2010 Elsevier B.V. All rights reserved.
pubmed:issnType
Electronic
pubmed:day
15
pubmed:volume
77
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
279-86
pubmed:meshHeading
pubmed:year
2010
pubmed:articleTitle
Synchrotron radiation linear dichroism (SRLD) investigation of the electronic transitions of quinizarin, chrysazin, and anthrarufin.
pubmed:affiliation
Department of Science, Systems and Models, Roskilde University, Universitetsvej 1, Bldg. 18, DK-4000 Roskilde, Denmark.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't