Linked Life Data

19645465

Source:http://linkedlifedata.com/resource/pubmed/id/19645465

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
33
pubmed:dateCreated
2009-9-2
pubmed:abstractText
The photoluminescence of nonfluorescent molecularly engineered quantum dots (QDs) with iron(III) dithiocarbamates was selectively switched on by nitric oxide. Such functional QDs consisted of CdSe-ZnS nanocrystals as fluorophores and surface bound tris(N-(dithiocarboxy)sarcosine)iron(III) as reactive centers for nitric oxide. The fluorescence of the QDs was quenched by energy transfer between the excited QD cores and the surface bound iron(III) dithiocarbamates due to their optical energy overlapping. Nitric oxide restored the fluorescence of the QDs through reduction of the surface bound iron(III) complexes to iron(I)-NO adducts and thus shutting down the energy transfer pathway. The fluorescence of the iron(III) complex engineered QDs was selectively and quantitatively restored by nitric oxide but not by other reactive oxygen species. Such a property of the functional QDs could be used for sensing nitric oxide based on the fluorescence "turn on" mechanism.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Aug
pubmed:issn
1520-5126
pubmed:author
pubmed:issnType
Electronic
pubmed:day
26
pubmed:volume
131
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
11692-4
pubmed:meshHeading
pubmed:year
2009
pubmed:articleTitle
Nitric oxide switches on the photoluminescence of molecularly engineered quantum dots.
pubmed:affiliation
Department of Chemistry, National University of Singapore, Singapore 117543.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't