Linked Life Data

19708674

Source:http://linkedlifedata.com/resource/pubmed/id/19708674

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
18
pubmed:dateCreated
2009-9-14
pubmed:abstractText
The synthesis, protonation, and Cu(2+) coordination chemistry of a tripodal heptaamine ligand (L(1)) functionalized with 2-pyridine fragments at the ends of its three branches are reported. L(1) presents six relatively high protonation constants followed by much more reduced constant that as indicated by the UV-vis and NMR data, occur on the pyridine fragments. p[H]-metric, ESI/MS(+), EPR and UV-vis data show that L(1) is able to form mono-, di-, and trinuclear Cu(2+) complexes. Slippage movements and molecular reorganizations have been observed to occur as a function of p[H] in the 1:1 Cu(2+) complexes. The kinetic studies showed that the complex formation is fast and proceeds through a dissociative Eigen-Wilkins mechanism. The decomposition of CuL(1) upon addition of acid excess occurs with two separate kinetic steps; the rate constant for the fast process does not vary with respect to the H(+) concentration whereas a linear dependence on H(+) is observed for the slow step.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
1520-510X
pubmed:author
pubmed:issnType
Electronic
pubmed:day
21
pubmed:volume
48
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
8985-97
pubmed:meshHeading
pubmed:year
2009
pubmed:articleTitle
Cu2+ coordination properties of a 2-pyridine heptaamine tripod: characterization and binding mechanism.
pubmed:affiliation
Laboratoire de Physico-Chimie Bioinorganique, Institut de Chimie, UMR 7177 CNRS-UdS, Université de Strasbourg, ECPM 25, rue Becquerel, 67200 Strasbourg, France.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't