ISSN:
1572-8870
Keywords:
Hydrosilylation catalysts
;
cyclodextrin organometallic platinum inclusion compounds
;
command-cure
;
β-cyclodextrin
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract Beta-cyclodextrin (β-CD) complexes of CODPtX 2 (COD=1.5-cyclooctadiene.X=Cl, Br, and I) have been prepared and employed as hydrosilylation catalysts. When used in cross-linkable, silicone-containing systems, these catalysts provide a long shelf stability at ambient temperature but cure rapidly at elevated temperature. These systems thus have the property of “command-cure”. Extensive analytical investigations were undertaken to develop reproducible synthetic methodology for the preparation of inclusion compounds free of surface contamination of the guest platinum compound. Water plays a key role in the synthesis of such platinum inclusion compounds. Dried β-CD CODPtX 2 compounds can be washed with organic solvent to remove residual uncomplexed CODPtX 2, while organic solvent washing of wet inclusion compounds results in removal of the guest from the β-CD cavity. Examination of these catalysts in curable silicone systems is described.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01098323
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