Peripheral functionalisation of dendrimers with polyoxotungstate complexes assembled by ionic bonding and their use as oxidation catalysts: Influence of the tether length
作者:Sylvain Nlate、Lauriane Plault、Didier Astruc
DOI:10.1039/b616288f
日期:——
poly-ammonium salts. Reactions of the latter with H3PW12O40 in the presence of hydrogenperoxide led to dendrimers containing PO4[WO(O2)2]4}3− species at the periphery. These compounds are efficient catalysts for the selectiveoxidation of alkenes, sulfides and alcohols in an aqueous–CDCl3 biphasic system, using hydrogenperoxide as the primary oxidant. The complexes with dendritic wedges directly bonded
The Efficient Copper(I) (Hexabenzyl)tren Catalyst and Dendritic Analogues for Green “Click” Reactions between Azides and Alkynes in Organic Solvent and in Water: Positive Dendritic Effects and Monometallic Mechanism
作者:Liyuan Liang、Jaime Ruiz、Didier Astruc
DOI:10.1002/adsc.201100449
日期:2011.12
An easily synthesized, copper(I) (hexabenzyl)tren complex 1 is an efficient catalyst for the copper(I)-catalyzed Huisgen-type 1,3-cycloaddition between azides and alkynes (CuAAC) reaction in toluene. Alternatively, a convenient procedure involves mixing copper(I) bromide (CuBr) with hexabenzyltren and the substrates in toluene which gives, for instance, 100% yield of triazole in 10 min using 0.1 equiv
Dendritic polyallyl and polyferrocenyl bipyridine ligands: Synthesis, MALDI-TOF characterization and ruthenium(II) complexation studies
作者:Claire Jahier、Sylvain Nlate
DOI:10.1016/j.jorganchem.2008.11.036
日期:2009.3
contrast to the bulky 18-ferrocenyl bipyridineligand 7, the 6-allyl 4 and the 18-allyl 5 bipyridineligands react with Ru(bpy)2Cl2 to give the corresponding ruthenium(II) complexes 9 and 10. In the case of ligand 7, the steric bulk of the two nonaferrocenyl wedges at the 4,4′-position of the bipyridine moiety prevents the conversion of the transoid structure of the ligand to the cisiod structure needed
“Click” Dendrimers: Synthesis, Redox Sensing of Pd(OAc)<sub>2</sub>, and Remarkable Catalytic Hydrogenation Activity of Precise Pd Nanoparticles Stabilized by 1,2,3-Triazole-Containing Dendrimers
methanol yields Pdnanoparticles (PdNPs) that are stabilized either by several dendrimers (G0, DSN) or by encapsulation inside a dendrimer (G1 and G2: DEN), as confirmed by TEM. Relative to PAMAM-DENs (PAMAM=poly(amidoamine)), the "click" DSNs and DENs show a remarkable efficiency and stability for olefin hydrogenation under ambient conditions of various substrates. The influence of the reductant of PdII
A 54-ferrocene dendrimer is synthesized by a convergentroute and can be used to modify a Pt electrode in CH2Cl2; it can be reversibly oxidized in DMF in a single 54-electron wave (and with NO+).