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