20343
While providing a recipe for making CP fluorescence bright at the single - molecule level , these results identify a lack of fundamental understanding in the community of the influence of the environment on excited states in conjugated materials .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities:  
Answer:
 None