Linked Life Data

21146453

Source:http://linkedlifedata.com/resource/pubmed/id/21146453

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2010-12-27
pubmed:abstractText
The photoinduced electron transference (PET) interaction in porphyrin containing donor-acceptor (D-A) molecules is of great importance in nature and a significant part of the PET research has been devoted to the study of its mechanism ("through-space" or "through-bond") in these decades. Herein we synthesized a series of covalently linked porphyrin-anthraquinone dyads (Por-C(n)-AQ) bridged with flexible alkoxy chains at different lengths (n=1, 4, 10) and investigated their intramolecular PET using a combination of electronic absorption, steady-state fluorescence and decayed luminescence spectra. The experimental results show that the PET efficiency depends on the length of the flexible linkage between the porphyrin and anthraquinone moieties. Meanwhile, theoretical calculation applying the density functional theory (DFT) was also carried out to give the frontier orbital distribution and the optimized structures of these dyads. It is found that the orientation of the dyad with high PET efficiency is disadvantageous to ?-? interaction. Thus, the PET of these dyads seemingly is best compatible with a "through-bond" (superexchange) mechanism.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
1873-3557
pubmed:author
pubmed:copyrightInfo
Copyright © 2010 Elsevier B.V. All rights reserved.
pubmed:issnType
Electronic
pubmed:volume
78
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
437-42
pubmed:meshHeading
pubmed:year
2011
pubmed:articleTitle
The photoinduced electron transference of porphyrin-anthraquinone dyads bridged with different lengths of links.
pubmed:affiliation
School of Chemistry and Chemical Engineering, Guangdong Pharmaceutical University, No. 280, Waihuandong Road, Education Mega Centre, Guangzhou 510006, PR China. zhaoping666@163.com
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't