Premium
Synthesis of Rhodium Colloidal Nano‐Coating Grafted Mesoporous Silica Composite and its Application as Efficient Environmentally Benign Catalyst for Heck‐Type Reaction of Arylboronic Acids
Author(s) -
Li Liang,
Shi Jianlin
Publication year - 2008
Publication title -
advanced synthesis and catalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.541
H-Index - 155
eISSN - 1615-4169
pISSN - 1615-4150
DOI - 10.1002/adsc.200700578
Subject(s) - rhodium , catalysis , mesoporous material , chemistry , chemical engineering , colloid , mesoporous silica , leaching (pedology) , heterogeneous catalysis , coating , hybrid material , composite number , solvent , palladium , heck reaction , organic chemistry , materials science , composite material , environmental science , soil science , engineering , soil water
Abstract The synthesis and characterization of rhodium colloidal layer grafted mesoporous SBA‐15 material, designated as SBA‐Rh, are presented. In the preparation of this new catalyst, SBA‐15 mesoporous material was used as support without any pretreatment. The SiH functional groups were introduced onto the surface which resulted in highly dispersed metal colloid layer both on the outer and inner surface of the supporting material. The material was investigated for Heck‐type coupling reactions of alkenes with ayboronic in organic/water solvent. The ultrahigh specific area, large pore opening, and highly dispersed catalyst species in SBA‐Rh material created one of the most active heterogeneous catalysts for such reactions. Rhodium element was not detected in the final mixture by ICP after reaction. The catalyst species showed very high stability against leaching from the matrix and can be recycled for repeated use.