作者:A. Yu. Bochkov、V. N. Yarovenko、V. A. Barachevskii、B. V. Nabatov、M. M. Krayushkin、S. M. Dolotov、V. F. Traven’、I. P. Beletskaya
DOI:10.1007/s11172-009-0025-3
日期:2009.1
A number of new photochromic 3-(4-phenylthiazol-5-yl)-and 3-(4-hetarylthiazol-5-yl)- coumarins has been synthesized. These compounds possess properties of molecular photo- switches providing a reversible change of the fluorescence intensity in the visible region of the spectrum upon alternating irradiation of their solutions with the visible and UV light. Irradiation with the UV light (λ < 400 nm) leads to their electrocyclization and loss of fluorescence, whereas irradiation of the cyclic form with the visible light (λ < 400 nm) returns the system to the state with the original absorption and fluorescence spectra. Switching of fluorescence is also observed in polymer matrices.
合成了一系列新型光致变色香豆素衍生物,其结构为3-(4-苯基噻唑-5-基)-和3-(4-杂芳基噻唑-5-基)-香豆素。这些化合物具有分子光开关的特性,当其溶液在可见光和紫外光之间交替照射时,能够在可见光谱区域内实现可逆的荧光强度变化。使用紫外光(λ < 400 nm)照射会导致其发生电环化并失去荧光,而使用可见光(λ < 400 nm)照射环状形式则会使体系恢复到原有的吸收和荧光光谱状态。在聚合物基质中也观察到了荧光切换现象。