26807
Upon visible - light excitation of the dyes , quenching of the excited state occurs by exciplex formation between dye and bisphthalimide molecules or , in some cases , by excimer formation or aggregation - induced emission between two dye molecules .
 Chemical: bisphthalimide
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: bisphthalimide