{HEAD ~ The present invention} relates to diphenyl {TAIL ~ amine derivatives} having luminescent properties, and particularly to diphenyl amines substituted with various electron donating or electron withdrawing groups 
relates to
{ HEAD ~ The present invention } relates to diphenyl { TAIL ~ amine derivatives } having luminescent properties , and particularly to diphenyl amines substituted with various electron donating or electron withdrawing groups
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH