26790
Solvent effect studies revealed that in good solvents such as n - hexane , benzene , and 1 , 4 - dioxane , the profile of the fluorescence emission of the compound is characterized by pyrene monomer emission , but in poor solvent such as water , the emission is dominated by pyrene excimer emission .
 Chemical: n - hexane; Chemical: benzene; Chemical: 1 , 4 - dioxane; Chemical: pyrene
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: n - hexane; Chemical: benzene; Chemical: 1 , 4 - dioxane; Chemical: pyrene