Chinese Journal of Quantum Electronics ›› 2025, Vol. 42 ›› Issue (3): 295-303.doi: 10.3969/j.issn.1007-5461.2025.03.001

• Spectroscopy •     Next Articles

Mechanism of vitamin C and 9,10⁃anthraquinone photoinduced reaction based on time⁃resolved photoluminescence spectroscopy technology

WEI Yaxiong 1,2*, FU Tingting 1,2 , LIU Yi 1,2 , XU Xinsheng1,2*   

  1. 1 School of Physics and Electronic Information, Anhui Normal University, Wuhu 241002, China; 2 Anhui Key Laboratory for Control and Applications of Optoelectronic Information Materials, Wuhu 241002, China
  • Received:2023-12-22 Revised:2024-01-09 Published:2025-05-28 Online:2025-05-28

Abstract: The photoinduced reactions between antioxidant vitamin C (VC) and 9,10-anthraquinone (AQ) in excited triplet state were studied using time-resolved electron paramagnetic resonance spectroscopy and transient absorption spectroscopy techniques in different ethylene glycol-water micelle solutions prepared with different kinds of surfactants, such as nonylphenol polyoxyethylene ether, sodium di (−2-ethylhexyl) succinate sulfonate, sodium dodecyl sulfate (SDS), and cetyltrimethylammonium bromide (CTAB). The results indicate that the reaction mechanism between VC and AQ in homogeneous and micelle solutions is essentially hydrogen atom transfer. By comparing the bimolecular reaction rates between AQ and VC in different micelle solutions, it is found that the charge type of the surface charge layer of the micelles has a decisive impact on the reaction rate. Specifically, the anionic shell of SDS micelles will reduce the reaction rate by electrostatic repulsion of VC anions, while the cationic shell of CTAB micelles will greatly accelerate the reaction rate by electrostatic attraction of VC anions.

Key words: spectroscopy, photoinduced hydrogen atom transfer, time-resolved electron paramagnetic resonance, micelle effect, vitamin C, anthraquinone

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