8297
A multiscale investigation was carried out to study the dark and light - enhanced bactericidal mechanisms of poly ( phenylene ethynylene ) ( PPE ) - based cationic conjugated polyelectrolytes ( CPEs ) and oligo - phenylene ethynylenes ( OPEs ) .
 Chemical: poly ( phenylene ethynylene ); Chemical: PPE; Chemical: oligo - phenylene ethynylenes; Chemical: OPEs
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 ( phenylene ethynylene ); Chemical: PPE; Chemical: oligo - phenylene ethynylenes; Chemical: OPEs