{TAIL ~ An electroluminescent device} which comprises an organic luminescent layer containing the organometallic luminescent material comprising {HEAD ~ a compound} of formula : 
{ TAIL ~ An electroluminescent device } which comprises an organic luminescent layer containing the organometallic luminescent material comprising { HEAD ~ a compound } of formula :
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH