Abstract:
3,6-Bis(dimethylamino)acridine(hexamethylbenzene)dichlororuthenium(II) was used as a tricyclic
heteroatomic monomer to prepare polyimides from the corresponding dianhyrides by solution condensation. The ruthenium complex monomer was synthesized starting from [RuCl2(HMB)]2 and 3-
6-bis(dimethylamino)acridine. The polymers had inherent viscosities of 1.77 to 2.11 and were soluble
in most polar solvents. The glass transition temperatures were in the range of 204 to 298 ◦C and the
10% weight loss in the range of 506-626 ◦C, depending upon the structure of the dianhyride monomer.
The catalytic activity of the polyimides tested in a hydrosilylation reaction of acetophenone was up to
90%. Leaching of ruthenium into the reaction mixture, found to be in the range of 60-75 ppm, was an
indication of reduced catalyst bleeding.
Key Words: Heterogeneous catalysis, Ruthenium, Polyimide, Hydrosilylation.
