wherein {TAIL ~ the aromatic compound} is an organic pigment, an organic light emitter, or {HEAD ~ an organic semiconductor} 
wherein { TAIL ~ the aromatic compound } is an organic pigment , an organic light emitter , or { HEAD ~ an organic semiconductor }
OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD