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Kwon, Tae-Hyuk
Energy Recognition
Research Interests
  • Energy transfer, organic solar cells, supercapacitor, ultrasonic spray chemistry, dithienothiophene, iridium complexes, phosphorescent bioapplications

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Singlet Oxygen Generation from Polyaminoglycerol by Spin-Flip-Based Electron Transfer

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Title
Singlet Oxygen Generation from Polyaminoglycerol by Spin-Flip-Based Electron Transfer
Author
Nam, Jung SeungHong, YoungjooLee, Chae GyuKim, Tae InLee, ChaiheonRoh, Deok-HoLee, In SeongKweon, SongaAhn, GyunhyeokMin, Seung KyuKim, Byeong-SuKwon, Tae-Hyuk
Issue Date
2022-04
Publisher
American Chemical Society
Citation
JACS Au, v.2, no.4, pp. 933 - 942
Abstract
Reactive oxygen species have drawn attention owing to their strong oxidation ability. In particular, the singlet oxygen (1O2) produced by energy transfer is the predominant species for controlling oxidation reactions efficiently. However, conventional 1O2generators, which rely on enhanced energy transfer, frequently suffer from poor solubility, low stability, and low biocompatibility. Herein, we introduce a hyperbranched aliphatic polyaminoglycerol (hPAG) as a 1O2generator, which relies on spin-flip-based electron transfer. The coexistence of a lone pair electron on the nitrogen atom and a hydrogen-bonding donor (the protonated form of nitrogen and hydroxyl group) affords proximity between hPAG and O2. Subsequent direct electron transfer after photo-irradiation induces hPAG•+-O2•-formation, and the following spin-flip process generates 1O2. The spin-flip-based electron transfer pathway is analyzed by a series of photophysical, electrochemical, and computational studies. The 1O2generator, hPAG, is successfully employed in photodynamic therapy and as an antimicrobial reagent.
URI
https://scholarworks.unist.ac.kr/handle/201301/59331
DOI
10.1021/jacsau.2c00050
ISSN
2691-3704
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CHM_Journal Papers
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