Switching between H- and J-type electronic coupling in single conjugated polymer aggregates.

ABSTRACT: The aggregation of conjugated polymers and electronic coupling of chromophores play a central role in the fundamental understanding of light and charge generation processes. Here we report that the predominant coupling in isolated aggregates of conjugated polymers can be switched reversibly between H-type and J-type coupling by partially swelling and drying the aggregates. Aggregation is identified by shifts in photoluminescence energy, changes in vibronic peak ratio, and photoluminescence lifetime. This experiment unravels the internal electronic structure of the aggregate and highlights the importance of the drying process in the final spectroscopic properties. The electronic coupling after drying is tuned between H-type and J-type by changing the side chains of the conjugated polymer, b

SUBMITTER: Eder T 

PROVIDER: S-EPMC5696370 | biostudies-literature | 2017 Nov

REPOSITORIES: biostudies-literature