22907
Tuning the electronic and photophysical properties of heteroleptic iridium ( iii ) phosphorescent emitters through ancillary ligand substitution : a theoretical perspective .
 iridium ( iii )
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 iridium ( iii )