Turn off MathJax
Article Contents
songqiu yang, Yan Zhang, Yanni Wang. Photochemistry of potassium ferrocyanide and its reaction with uridine 5'-monophosphate in an aqueous solution under ultraviolet irradiation[J]. Chinese Journal of Chemical Physics .
Citation: songqiu yang, Yan Zhang, Yanni Wang. Photochemistry of potassium ferrocyanide and its reaction with uridine 5'-monophosphate in an aqueous solution under ultraviolet irradiation[J]. Chinese Journal of Chemical Physics .

Photochemistry of potassium ferrocyanide and its reaction with uridine 5'-monophosphate in an aqueous solution under ultraviolet irradiation

  • Received Date: 2021-01-22
  • Accepted Date: 2021-02-04
  • Rev Recd Date: 2021-02-03
  • Available Online: 2021-03-05
  • The photochemical reaction of potassium ferrocyanide (K4Fe(CN)6}) exhibits excitation wavelength dependence and non-Kasha rule behavior. In this study, the excited-state dynamics of K4Fe(CN)6 were studied by transient absorption spectroscopy. Excited state electron detachment (ESED) and phtoaquation reactions were clarified by comparing the results of 260 , 320 , 340 , and 350 nm excitations. ESED is the path to generate a hydrated electron (eaq-). ESED energy barrier varies with the excited state, and it occurrs even at the first singlet excited state (1T1g). The 1T1g state shows ~0.2 ps lifetime and converts into triplet [Fe(CN)6]4- by intersystem crossing. Subsequently, 3[Fe(CN)5]3- appears after one CN- ligand is ejected. In sequence, H2O attacks [Fe(CN)5]3- to generate [Fe(CN)5H2O]3- with a time constant of approximately 20 ps. The 1T1g state and eaq- exhibit strong reducing power. The addition of UMP to the K4Fe(CN)6 solution decreased the yield of eaq- and reduced the lifetimes of the eaq- and 1T1g state. The obtained reaction rate constant of 1T1g state and UMP was 1.7×1014 M-1 s-1, and the eaq- attachment to UMP was ~8×109 M-1 s-1. Our results indicate that the reductive damage of K4Fe(CN)6 solution to nucleic acids under ultraviolet irradiation cannot be neglected.

     

  • loading
  • 加载中

Catalog

    通讯作者: 陈斌, bchen63@163.com
    • 1. 

      沈阳化工大学材料科学与工程学院 沈阳 110142

    1. 本站搜索
    2. 百度学术搜索
    3. 万方数据库搜索
    4. CNKI搜索

    Article Metrics

    Article views (47) PDF downloads(8) Cited by()
    Proportional views
    Related

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return