物理化学学报 >> 1989, Vol. 5 >> Issue (06): 677-680.doi: 10.3866/PKU.WHXB19890607

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光诱导有机化合物异构化反应的研究——Ⅹ. 吲哚啉螺吡喃瞬态吸收光谱的研究

齐秀蓉; 虞群; 寿涵森; 樊美公; 李仲杰   

  1. 中国科学院感光化学研究所; 西北大学化学系

  • 收稿日期:1988-05-16 修回日期:1988-12-08 发布日期:1989-12-15
  • 通讯作者: 樊美公

LIGHT INDUCED ISOMERIZATION OF ORGANIC COMPOUNDS Ⅹ. Studies on Transient Absorption Spectra of Indolinospiropyrans

Qi Xiurong; Yu Qun; Shou Hansen; Fan Meigong; Li Zhongjie   

  1. Institute of Photographic Chemistry; Academia Sinica; Beijing; Department of Chemistry; Northwest University; Xian
  • Received:1988-05-16 Revised:1988-12-08 Published:1989-12-15
  • Contact: Fan Meigong

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摘要： 研究了1-正-辛基-3,3-二甲基-吲哚啉-2,2′-螺-5′,6′-(2-溴-4-硝基-苯并)吡喃, 1-正-辛基-3,3-二甲基-吲哚啉-2,2′-螺-5′,6′-(4-硝基-苯并)吡喃, 1-正-辛基-3,3-二甲基-吲哚啉-2,2′-螺-5′,6′-(2,4-二硝基-苯并)吡喃及1-正-辛基-3,3-二甲基-吲哚啉-2,2′螺-5′6′-(2-氯-4-硝基-苯并)吡喃在环已烷和甲苯溶液中光致开环过程的瞬态吸收光谱。观察到具有较长寿命的中间体及聚集体的存在。初步提出异构化反应过程的机制中既包含有三重态过程, 也有单重态参与。

Abstract: Transient absorption spectra in the photocolouration of 1-n-octyl-3,3-dimethylindolino-2,2'-spiro-5',6'-(2-bromo-4-nitro-benzo)-pyran (SPP1), 1-n-octyl-3,3-dimethyl-indolinn-2,2'-spiro-5',6'-(4-nitro-benzo)-pyran (SPP2), 1-n-octyl-3,3-dimethylindolino-2,2'-spiro-5', 6'-(2, 4-dinitro-benzo)-pyran (SPP3) and 1-n-octyl-3,3-dimethylindolino-2,2'-spiro-5', 6'-(2-chloro-4-nitro-benzo)-pyran (SPP4) in toluene and eyclohexane were investigated with nanosecond laser photolysis. Several certain intermediats and an aggregate were observed. The mechanism of the isomerization involves not lnly triplet process but also singlet process.