18754
Structural and dynamical properties of room - temperature ionic liquids containing the cation 1 - butyl - 3 - methylimidazolium ( [ BMIM ] ( + ) ) and three different anions ( hexafluorophosphate , [ PF6 ] ( - ) , tetrafluoroborate , [ BF4 ] ( - ) , and bis ( trifluoromethylsulfonyl ) imide , [ NTf2 ] ( - ) ) doped with several molar fractions of lithium salts with a common anion at 298 . 15 K and 1 atm were investigated by means of molecular dynamics simulations .
 Chemical: 1 - butyl - 3 - methylimidazolium; Chemical: [ BMIM ] ( + ); Chemical: hexafluorophosphate; Chemical: [ PF6 ] ( - ); Chemical: tetrafluoroborate; Chemical: [ BF4 ] ( - ); Chemical: bis ( trifluoromethylsulfonyl ) imide; Chemical: [ NTf2 ] ( - ); Chemical: lithium
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: 1 - butyl - 3 - methylimidazolium; Chemical: [ BMIM ] ( + ); Chemical: hexafluorophosphate; Chemical: [ PF6 ] ( - ); Chemical: tetrafluoroborate; Chemical: [ BF4 ] ( - ); Chemical: bis ( trifluoromethylsulfonyl ) imide; Chemical: [ NTf2 ] ( - ); Chemical: lithium