10645
Poly ( ferrocenyl ( 3 - bromopropyl ) methylsilane ) and poly ( ethylene imine ) are employed in a layer - by - layer deposition process to form covalently connected , redox - active multilayer thin films by means of an amine alkylation reaction .
 Chemical: Poly ( ferrocenyl ( 3 - bromopropyl ) methylsilane ); Chemical: poly ( ethylene imine ); Chemical: amine
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: Poly ( ferrocenyl ( 3 - bromopropyl ) methylsilane ); Chemical: poly ( ethylene imine ); Chemical: amine