Phosphorescence Properties of Boron/Bismuth Hybrid Conjugated Materials

In this study, we synthesized new room-temperature phosphorescent materials by incorporating bismuth into thiophene units. The phosphorescence properties of these materials, such as emission lifetime and wavelength, could be further controlled by combining tricoordinate boron with the thienylbismuth structures. The synthesized bismuth- and boron-containing thiophene compounds exhibited phosphorescence at room temperature in both solution and solid states. Furthermore, the introduction of boron raised the energy of the triplet state in the π-conjugated system, resulting in a blue shift of the phosphorescence wavelength. The analysis of photoluminescence properties and TD-DFT calculations revealed that the introduction of bismuth enhances phosphorescence properties, whereas the introduction of boron further promotes intersystem crossing.PMID:38426601 | DOI:10.1002/asia.202301142

Source: Chemistry, an Asian Journal - March 1, 2024 Category: Chemistry Authors: Yohei Adachi Shota Terao Yusuke Kanematsu Joji Ohshita Source Type: research