2,2'-[[6,6,12,12-tetrakis(4-hexylphenyl)-6,12-dihydro-Thieno[2'',3'':4',5']thieno[3',2':4,5]cyclopenta[1,2-b]thieno[2''',3''':4'',5'']thieno[2'',3'':3',4']cyclopenta[1',2':4,5]thieno[2,3-d]thiophene-2,7-diyl]bis[methylidyne(2 or 3-chloro-3-oxo-1H-indene-2,1(3H)-diylidene) ]]bis-propanedinitrile