{HEAD ~ An organometallic luminescent material} selected from the group consisting of the compounds of formulae to of the present invention can emit {TAIL ~ blue, green and red lights} 
{ HEAD ~ An organometallic luminescent material } selected from the group consisting of the compounds of formulae to of the present invention can emit { TAIL ~ blue , green and red lights }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL