| 초록 |
Semiconductive polymers have been incorporated in various optoelectronic devices and chemical sensor systems. In order to provide new functions, chemical modification of these polymers is necessary. In the first part, a facile way to modify poly(3-hexylthiophene) (P3HT) will be presented. The method employs a lithium-halogen exchange reaction on brominated P3HT, which generates more than 100 thienyl lithium species in a single polymer chain. The reactive thienyl lithiates can be quenched with a variety of electrophiles, generating derivatized P3HTs. Carbon nanotube-P3HT composites were fabricated for use in chemiresistive sensors. In the second part, functionalization of poly(phenylene ethynylene)s will be introduced. Specifically, through side-chain engineering, this functionalization generates emissive polymer aggregates (emissive excimers) at the air-water interface. The excimers can be transferred to glass substrates, which are responsive to selected volatile organic compounds (VOCs) via fluorescence changes induced by energy migration. |
