Linear chemoselective carbosilane polymers and methods for use in analytical and purification applications

A method of preparing a substituted carbosilane polymer, comprising the steps of:

• (a) selecting a starting material independently selected from the group consisting of aryl substituted metallated hydrocarbons and aryl substituted metallated carbosilanes;
• (b) reacting said aryl substituted metallated hydrocarbon or said aryl substituted metallated carbosilane with an alkenyl or alkynyl dichlorocarbosilane, thereby forming an unsaturated carbosilane intermediate having the structure:
• wherein R4 and R5 said independently selected aryl substituted hydrocarbons or carbosilane groups derived from aryl substituted metallated hydrocarbon or said aryl substituted metallated carbosilanes;
• and
• wherein R6 is an alkenyl or alkynyl group;
• (c) performing a hydrosilation reaction on said unsaturated carbosilane intermediate in the presence of a hydrosilation catalyst, thereby forming a arylalkyl substituted carbosilane polymer intermediate having the structure:
• wherein q is an integer greater than or equal to 1;
• and
• wherein Y is a hydrocarbon polymer backbone component derived from hydrosilation of said R6;
• (d) reacting said arylalkyl substituted carbosilane polymer intermediate with an alkene or alkyne in the presence of a hydrosilation catalyst, thereby forming an arylalkyl substituted polycarbosilane having the structure:
• wherein R7 is an alkyl or alkenyl group;
• and
• (e) reacting said arylalkyl substituted polycarbosilane with hexafluoroacetone, thereby forming said substituted carbosilane polymer.

A method of preparing a substituted carbosilane polymer, comprising the steps of:

• (a) selecting a starting material independently selected from the group consisting of substituted metallated hydrocarbons and substituted metallated carbosilanes;
• (b) reacting said substituted metallated hydrocarbon or said substituted metallated carbosilane with H2SiCl2, thereby forming a disubstituted silane or carbosilane intermediate having the structure:
• wherein R8 and R9 are said selected substituted metallated hydrocarbon or said substituted metallated carbosilane;
• (c) performing a hydrosilation reaction between said disubstituted silane or carbosilane intermediate and a doubly unsaturated species in the presence of a hydrosilation catalyst, thereby forming a polycarbosilane intermediate having the structure:
• wherein q is an integer greater than or equal to 1;
• wherein K is a hydrocarbon or carbosilane fragment derived from double hydrosilation of said doubly unsaturated species;
• wherein D is a hydrocarbon or carbosilane fragment derived from single hydrosilation of said doubly unsaturated species;
• (d) reacting said polycarbosilane intermediate with an alkene or alkyne in the presence of a hydrosilation catalyst, thereby forming an substituted polycarbosilane having the structure:
• wherein R10 is an alkyl or alkenyl group derived from said hydrosilation reaction between said alkene or alkyne and said polycarbosilane intermediate;
• and
• (e) reacting said substituted polycarbosilane with hexafluoroacetone, thereby forming said substituted carbosilane polymer.