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