title: Side chain mediated electronic contact between a tetrahydro-4H-thiopyran-4-ylidene-appended polythiophene and CdTe quantum dots.
abstract: The properties of a mixed CdTe quantum dot/tetrahydro-4H-thiopyran-4-ylidene-functionalized polythiophene system are reported. This system was prepared by exposing trioctylphosphine (TOP)-capped CdTe quantum dots to the polythiophene in solution. Strong fluorescence emission quenching and shortening of the fluorescence emission lifetimes of both the polythiophene and the quantum dots occur when they are mixed, indicating the occurrence of photoinduced charge separation. Photoinduced absorption spectroscopy reveals a considerable decrease in the population of the polythiophene triplet excited state in the mixed system. These results demonstrate that between the quantum dots and the polythiophene there is both physical and electronic contact, which is mediated by the tetrahydro-4H-thiopyran-4-ylidene side chains.
authors.affiliation: Debye Institute, Organic Chemistry and Catalysis, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands.
authors.forename: Rick
authors.initials: R
authors.lastname: van Beek
authors.forename: Arjan P
authors.initials: AP
authors.lastname: Zoombelt
authors.forename: Leonardus W
authors.initials: LW
authors.lastname: Jenneskens
authors.forename: Cornelis A
authors.initials: CA
authors.lastname: van Walree
authors.forename: Celso
authors.initials: C
authors.lastname: de Mello Donegá
authors.forename: Dirk
authors.initials: D
authors.lastname: Veldman
authors.forename: René A J
authors.initials: RA
authors.lastname: Janssen