19556
The electronic circular dichroism ( ECD ) and UV - visible absorption ( UV - vis ) spectra of Strandberg - type polyoxometalates ( POMs ) ( R , R ) - [ ( R * PO3 ) 2M5O15 ] ( 2 - ) ( R * = CH3CH ( NH3 ) , ( M = Mo , W ) ) have been explored using the time - dependent density functional theory ( TDDFT ) method .
 Chemical: polyoxometalates; Chemical: POMs; Chemical: ( R , R ) - [ ( R * PO3 ) 2M5O15 ] ( 2 - ); Chemical: CH3CH ( NH3 ); Chemical: Mo; Chemical: W
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: polyoxometalates, POMs, ( R , R ) - [ ( R * PO3 ) 2M5O15 ] ( 2 - ), CH3CH ( NH3 ), Mo, W 
Answer:
 Chemical: polyoxometalates; Chemical: POMs; Chemical: ( R , R ) - [ ( R * PO3 ) 2M5O15 ] ( 2 - ); Chemical: CH3CH ( NH3 ); Chemical: Mo; Chemical: W