Linked Life Data

17051577

Source:http://linkedlifedata.com/resource/pubmed/id/17051577

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
11
pubmed:dateCreated
2006-11-13
pubmed:abstractText
Zn(II) and Cu(II) porphyrins with beta-conjugated barbiturate functional groups have low-energy electronic transitions which are unusual in that there are two strong bands in the Soret region. Resonance excitation of the two bands shows that each has features characteristic of both the porphyrin and barbiturate groups, with some perturbation to these features caused by the interaction of the two chromophores. The resonance Raman (RR) spectrum (lambda(exc)=413.1 nm) of the 412 nm band shows two bands at 1722 and 1743 cm(-1) attributable to C==O stretches in the substituent. Changes in frequency of porphyrin core modes due to the differing metal centres are reproduced by density functional theory calculations. The Q band RR spectra show modes with anomalous polarization which may be attributed to A(2g) modes, however no overtone or combination bands are observed.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Nov
pubmed:issn
1439-4235
pubmed:author
pubmed:issnType
Print
pubmed:day
13
pubmed:volume
7
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
2358-65
pubmed:meshHeading
pubmed:year
2006
pubmed:articleTitle
Resonance Raman studies of beta-substituted porphyrin systems with unusual electronic absorption properties.
pubmed:affiliation
Department of Chemistry, University of Otago, Union Place, Dunedin, New Zealand.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't