BLOCK CONJUGATED COPOLYMERS - TOWARD QUANTUM-WELL NANOSTRUCTURES FOR EXPLORING SPATIAL CONFINEMENT EFFECTS ON ELECTRONIC, OPTOELECTRONIC, AND OPTICAL PHENOMENA

An ABA triblock conjugated copolymer, 6-diyl-1,4-phenylene)-block-poly (2,5-benzoxazole), 1, was synthesized, characterized, and used to demo nstrate spatial confinement effects on the electronic structure and th e optical and optoelectronic properties of block copolymers. Optical a bsorption, photoluminescence, and photoluminescence excitation spectra of thin films of the triblock copolymer evidence spatial confinement of excitons as well as microphase separation. Efficient energy transfe r via interchain and intrachain mechanisms was observed in the tribloc k conjugated copolymer. The results suggest that microphase separation in hulk block conjugated copolymers can significantly modify the spat ial modulation and confinement dimensionalities expected in isolated b lock copolymer chains.