Premium
Efficient Ruthenium Nanocatalysts in Liquid–Liquid Biphasic Hydrogenation Catalysis: Towards a Supramolecular Control through a Sulfonated Diphosphine–Cyclodextrin Smart Combination
Author(s) -
Guerrero Miguel,
Coppel Yannick,
Chau Nguyet Tran Thanh,
Roucoux Alain,
DenicourtNowicki Audrey,
Monflier Eric,
Bricout Hervé,
Lecante Pierre,
Philippot Karine
Publication year - 2013
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201300467
Subject(s) - ruthenium , nanomaterial based catalyst , cyclodextrin , catalysis , supramolecular chemistry , reactivity (psychology) , chemistry , coordination complex , nanoparticle , metal , combinatorial chemistry , organic chemistry , materials science , nanotechnology , molecule , medicine , alternative medicine , pathology
The combination between a sulfonated diphosphine (L) and a cyclodextrin (CD) allowed the preparation of very stable water‐soluble ruthenium nanoparticles (RuNPs) that displayed pertinent catalytic performances in hydrogenation of unsaturated substrates with a supramolecular control effect of the cyclodextrin. For comparison purpose, the RuNPs were produced by hydrogenation of the organometallic [Ru(1,5‐cyclooctadiene)(1,3,5‐cyclooctatriene)] complex under mild conditions (3 bar H 2 ; room temperature) and in the presence of L or a L/CD mixture as stabilizer leading to Ru/L and Ru/L/CD systems, respectively. The so‐obtained nanoparticles were fully characterized by complementary techniques. Interestingly, NMR investigations evidenced 1) the strong coordination of the sulfonated diphosphine ligand at the metallic surface and 2) in the presence of cyclodextrin, the formation of an inclusion complex between L and CD that modified the coordination mode of the diphosphine. The investigation of both RuNPs systems in biphasic hydrogenation of unsaturated substrates pointed out relevant differences in terms of reactivity, thus evidencing the influence of the supramolecular interaction at the metallic surface on the catalytic performances of the nanocatalysts. This work took advantage of the supramolecular properties of a cyclodextrin to modulate the surface reactivity of diphosphine‐stabilized ruthenium nanoparticles and may open new opportunities in the field of nanocatalysis.