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Citation: Li Yi-Ting, Zhou Jin-Wei, Zhang Fu-Shi, Wang Yan-Qiao, Song Xin-Qi. Mechanistic Study on the Ring Closure Process of a Negative Photochromic Spiropyran[J]. Acta Physico-Chimica Sinica, ;1997, 13(09): 808-814. doi: 10.3866/PKU.WHXB19970908 shu

Mechanistic Study on the Ring Closure Process of a Negative Photochromic Spiropyran

1.
Department of Chemistry,Tsinghua University,Beijing 100084

Received Date: 5 December 1996
Available Online: 15 September 1997

The mechanism of ring closure process of negative photochromic indoline spiropyran is investigated by its UV-visible spectra. The quantum yields of light bleaching process of the colored form in different solvents and with different additives are measured. The results indicate that the oxygen and other triplet quenching agent such as triphcnyladrine have little effect on the decoloration process. The occurrence of the photodecoloration reaction of the system primarily via a singlet channel can be identified.
- Negative photochromism,
- Indoline spiropran,
- Quantum yield
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