Isolation of π-conjugated system through polyfluorene from electronic coupling with side-chain substituents by cardo structures
作者:Hyeonuk Yeo、Kazuo Tanaka、Yoshiki Chujo
DOI:10.1002/pola.26249
日期:2012.11.1
the electronic states of the substituents at the cardo carbons and the PF main chains should be less influenced by the introduction of EDG and/or EWG at the cardostructure. Furthermore, these preservation effects in the cardo‐PFs were observed in the film states even after the thermal treatment. We conclude that the electronicstructures of the PF main chain are highly preserved from the correlations
Construction and properties of a light-harvesting antenna system for phosphorescent materials based on oligofluorene-tethered Pt–porphyrins
作者:Hyeonuk Yeo、Kazuo Tanaka、Yoshiki Chujo
DOI:10.1039/c6ra28735b
日期:——
and high film-formability. From the series of optical measurements, it was shown that bright phosphorescence was observed from the LHA molecules. Efficient energy transfer through the cardo structure was confirmed from the oligofluorene units to the Pt–porphyrin core. Additionally, it was shown that aggregation-caused quenching (ACQ) and oxygen-deactivation of phosphorescence can be inhibited in the film
Effective Light-Harvesting Antennae Based on BODIPY-Tethered Cardo Polyfluorenes via Rapid Energy Transferring and Low Concentration Quenching
作者:Hyeonuk Yeo、Kazuo Tanaka、Yoshiki Chujo
DOI:10.1021/ma400015d
日期:2013.4.9
Light-harvesting antennae (LHA) were demonstrated using polyfluorenes (PFs) modified with borondipyrromethene (BODIPY) dyes tethered to the cardostructures. PFs work as a light absorber and an energy donor to the BODIPY units. The series of BODIPY-tethering PFs via the cardo carbon including homocardo PFs and alternative polymers with fluorene and the cardo fluorene were synthesized, and their optical properties