915088-66-3Relevant academic research and scientific papers
Photochemical reaction of p-hydroxycinnamic-thiophenyl ester in the microcrystalline state
Usman, Anwar,Asahi, Tsuyoshi,Sugiyama, Teruki,Masuhara, Hiroshi,Tohnai, Norimitsu,Miyata, Mikiji
, p. 14233 - 14240 (2010)
We have studied the photochromic reaction of p-hydroxycinnamic-thiophenyl ester in the microcrystalline state. We attributed the fluorescence spectral evolution of the mierocrystal, under UV irradiation, to the photoinduced trans-to-cis isomerization, The photocyclic behavior of the chromophore was demonstrated by cis-to-trans back reaction under a subsequent visible light irradiation. In addition, the [2 + 2] topochemical photocyclodimer was observed as another photoproduct. It is considered that the cooperative photoisomerization is initiated at the local lattice distortion and free spaces around the [2 + 2] cyclodimer near the crystal surface, and the photoisomerization induces larger lattice deformation and further photoisomerization in the interior of the crystal.
