BODIPY functionalized o-carborane dyads for low-energy photosensitization
- Authors
- Jin, Guo Fan; Cho, Yang-Jin; Wee, Kyung-Ryang; Hong, Seong Ahn; Suh, Il-Hwan; Son, Ho-Jin; Lee, Jong-Dae; Han, Won-Sik; Cho, Dae Won; Kang, Sang Ook
- Issue Date
- 2015
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- DALTON TRANSACTIONS, v.44, no.6, pp.2780 - 2787
- Indexed
- SCIE
SCOPUS
- Journal Title
- DALTON TRANSACTIONS
- Volume
- 44
- Number
- 6
- Start Page
- 2780
- End Page
- 2787
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/96193
- DOI
- 10.1039/c4dt03123g
- ISSN
- 1477-9226
- Abstract
- A new type of organic dyad that can induce low-energy photosensitization has been developed; electron donor and electron acceptor units are boron dipyrromethene (BODIPY) and ortho-carborane (o-Cb), respectively. The new dyads consist of a V-shaped BODIPY-(o-Cb)-BODIPY molecular array in which two BODIPY units are substituted onto two adjacent carbon atoms of the central o-Cb. In the presence of the o-Cb unit, as an electron acceptor, significant fluorescence quenching was observed which indicated that photoinduced electron transfer (PET) had occurred from the end-on BODIPY units to the central o-Cb with PET efficiencies of 63-71%. As a result, the corresponding cationic and anionic species that are responsible for the charge transfer state were detected by the serial spectroelectrochemical studies: cationic BODIPY radicals at 400 nm at the applied voltage of 1.44 V and broad absorption bands of anionic o-Cb radicals in the range of 250-490 nm at -1.84 V. Transient absorption studies further confirmed the BODIPY radical anion at 540 nm and the o-Cb radical anion at 350-475 nm with a structureless broad band.
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Collections - College of Science and Technology > Department of Advanced Materials Chemistry > 1. Journal Articles
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