Showing papers by "Ileana Dragutan published in 2009"
TL;DR: In this article, a comparison between FT-Raman and 1 H NMR was made on application of these complementary methods on the same ring-opening metathesis polymerization (ROMP) reaction, evidencing their assets and disadvantages and reliability.
11 citations
Journal Article•
TL;DR: Most important advances in ruthenium catalysts for olefin metathesis achieved during the last four years are brietly reviewed in this paper, focusing on new catalytic precursors endowed with inventive N-heterocyclic carbene ligands.
Abstract: Most important advances in ruthenium catalysts for olefin metathesis achieved during the last 4 years are brietly reviewed. The first part of the survey focuses on new catalytic precursors endowed with inventive N-heterocyclic carbene ligands which have proved highly proficient in a diversity of applications based on metathesis reactions. Part two expends the progress in other types of Ru initiators.
1 citations
TL;DR: In this paper, the synthesis of homogeneous and immobilized Ru-complexes containing Schiff bases as O,N-bidentate ligands benefiting from a versatile, quite general and thoroughly exemplified two-step procedure is discussed.
Abstract: The paper presents recent work conducted in our group on the synthesis of a novel class of homogeneous and immobilized Ru- complexes containing Schiff bases as O,N-bidentate ligands benefiting from a versatile, quite general and thoroughly exemplified two- step procedure. The new Ru-complexes with improved stability incorporate a variety of Schiff bases, associated with traditional inorganic and organic ligands such as chloride, phosphanes, arenes, cyclodienes, NHC etc., and different carbenes (alkylidene, vinylidene, allenylidene and indenylidene). By a proper choice of the Schiff base, useful physical and chemical properties of the derived Ru- complexes could be induced resulting in tunable catalytic activity for metathesis and related processes. A pertinent example is the latency of selected Schiff base Ru catalysts which by becoming active only under specific conditions (heat or acid activation) are ideal for industrial applications, e.g. reaction injection molding processes. The synthetic approaches that are critically discussed in this artcile have led to a diversity of Ru-complexes of which several members have risen to the rank of commercial catalysts.
Journal Article•
TL;DR: The first commercial sol-gel entrapped catalysts demonstrate the long awaited enhancements in terms of selective activity and versatility that the chemistry of solgel materials enabled to forecast following the early developments of the solgel science and technology in the 1980s as discussed by the authors.
Abstract: The first commercial sol-gel entrapped catalysts demonstrate the long awaited enhancements in terms of selective activity and versatility that the chemistry of sol-gel materials enabled to forecast following the early developments of the sol-gel science and technology in the 1980s. Through selected recent examples, we show how and why hybrid silica gels impact some of the most relevant fine chemical productions.