REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa , 2829-516 Caparica, Portugal.
Org Lett. 2014 May 16;16(10):2582-5. doi: 10.1021/ol501111d. Epub 2014 May 2.
Two ionic liquids with photoisomerizable p-hydroxycinnamic acid moieties were synthesized and characterized by X-ray crystallography and DSC, and their photochemistry was studied in solution and neat conditions. Irradiation at absorption maxima led to trans-cis photoisomerization and resulted in significant reduction of melting temperatures of the ionic liquids. X-ray structures of both compounds show an intricate network of supramolecular interactions before irradiation. Physical and chemical transformations are completely reversible upon irradiation at lower wavelengths of ionic liquid solutions in acetonitrile.
合成了两种带有光致异构对羟基肉桂酸部分的离子液体，并通过 X 射线晶体学和差示扫描量热法对其进行了表征，研究了它们在溶液和纯态条件下的光化学性质。在吸收最大值处照射会导致顺反异构化，并导致离子液体的熔点显著降低。两种化合物的 X 射线结构在照射前显示出复杂的超分子相互作用网络。在乙腈中的离子液体溶液较低波长的照射下，物理和化学转化是完全可逆的。
