Linked Life Data

8301416

Source:http://linkedlifedata.com/resource/pubmed/id/8301416

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2-3
pubmed:dateCreated
1994-3-8
pubmed:abstractText
The effect of 2 ns pulses of 355 nm laser light on aqueous solutions of pazelliptine (PZE) was investigated and biphotonic ionization was observed. The absorption spectrum corresponding to the pazelliptine radical cation (PZE+) and the hydrated electron simultaneously formed in this process was determined. In the absence of oxygen, eaq- reacted with unexcited PZE (k = 1.6 x 10(10) M-1 s-1) to give the pazelliptine radical anion (PZE-). This latter species was identified by separate pulse radiolysis experiments. The radicals cation and anion disappeared by recombination on the millisecond time range. In presence of oxygen, eaq- was scavenged by O2 leading to the formation of the superoxide radical (O2.-) in competition to the formation of the radical PZE.-.PZE+ reacted with O2.- to produce H2O2 (k = 9 x 10(9) M-1 s-1). The spectral analysis revealed that PZE triplet was also formed during the laser pulse. In the absence of oxygen, the triplet-triplet absorption decreased on the microsecond time scale (2k = 1.5 x 10(10) M-1 s-1). In oxygenated solutions, eaq- and the pazelliptine triplet decayed exponentially in the same time range.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
1011-1344
pubmed:author
pubmed:issnType
Print
pubmed:volume
21
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
203-9
pubmed:dateRevised
2007-7-23
pubmed:meshHeading
pubmed:year
1993
pubmed:articleTitle
Two-photon ionisation of the antitumor drug pazelliptine (BD40) by 355 nm laser photolysis.
pubmed:affiliation
Laboratoire de Photophysique Moléculaire, Université Paris-Sud, France.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't