" group, R7 is --H, --CH3 or --C2 H5, R8 is an alkyl group or a substituted alkyl group of C6 -C18, each of R9 -R14 is independently --H, --CH3 or --C2 H5, each of R15 and R16 is independently --H, --CH3, --C2 H5, or a phenyl group, R17 is --H, --CH3, --C2 H5, OH, --NH2 or --NO2, R18 is an alkyl group of C1 -C4, p is a value in the range of 2 to 80, CuPc is a copper phthalocyanine group, each of R1" . . . . .