物理化学学报 >> 1987, Vol. 3 >> Issue (03): 272-277.doi: 10.3866/PKU.WHXB19870310

研究论文 上一篇    下一篇

邻羟基二苯甲酮类紫外吸收剂离解常数的测定

叶玲; 朱琴琴; 吴世康   

  1. 中国科学院感光化学研究所
  • 收稿日期:1985-12-17 修回日期:1986-07-08 发布日期:1987-06-15

MEASUREMENT OF pK VALUES OF ORTHO-HYDROXY-BENZOPHENONE UV-ABSORBERS

Ye Ling; Zhu Qinqin; Wu Shikang   

  1. Institute of Photographic Chemistry; Academia Sinica
  • Received:1985-12-17 Revised:1986-07-08 Published:1987-06-15

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摘要： 本工作对两种常见的商品紫外吸收剂——2-羟基-4-甲氧基二苯甲酮(UV-9)和2,4-二羟基二苯甲酮(UV-0)在基态和激发态时的离解常数进行了测定。对UV-0存在着反常的吸收强度和pH关系曲线作了合理的解释, 并结合测得的离解常数对上述紫外吸收剂耗失能量的机理进行了讨论。

Abstract: In this paper the pK values of both commonly commercial UV-absorbers-2-hydroxy-4-methoxy-benzophenone (UV-9) and 2,4-dihydroxy-benzophenone (UV-0) at ground and excited states have been determined.
The unusual relation curve between absorption intensity and pH value for UV-0 was explained reasonablely.
The energy-loss mechanism of UV-absorbers described above has been discussed by means of the pK values which were obtained in this work.