17975
Tuning the Stability of Graphene Layers by Phthalocyanine - Based oPPV Oligomers Towards Photo - and Redoxactive Materials .
 Chemical: Graphene; Chemical: Phthalocyanine
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: Graphene; Chemical: Phthalocyanine