Ultrafast dynamics of photoinduced ring-opening and the subsequent ring-closure reactions of spirooxazines in crystalline state

Mototsugu Suzuki, Tsuyoshi Asahi*, Katsutoshi Takahashi, Hiroshi Masuhara

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

We investigated photoisomerization dynamics of spironaphthooxazine (SNO) and its chloro-substituted derivative (Cl-SNO) in crystalline phase by femtosecond diffuse reflectance absorption spectroscopy. Although the photoinduced ring-opening reaction occurred in 3 ps and <1 ps for SNO and Cl-SNO, respectively, photoisomerization to transplanar photomerocyanine did not take place. The generated non-planar open form of SNO lived for 2 ns, while that of Cl-SNO returned to the spiro form in 1 ps. The crystalline phase results are compared to the analogous experiments in amorphous solids with a view of restricted conformational changes of molecules embedded in a crystal lattice.

Original languageEnglish
Pages (from-to)384-392
Number of pages9
JournalChemical Physics Letters
Volume368
Issue number3-4
DOIs
StatePublished - 17 Jan 2003

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