Absorption spectra of photoinduced E isomers of aurones, thioindogenides, and selenoindogenides

Supramolecular Complexation of Alkali Cations through Mechanochemical Reactions between Crystalline Solids

“…Appropriate groups on the aromatic rings result in a bent shape of one isomer and a (more‐or‐less) linear shape for the other. Methyl substitutions at both the 5‐position of the heterocycle and at the para ‐position of the stilbene unit (HTI 3 )25 were found to be effective: the Z isomer of 3 is encapsulated exclusively in 1⋅1 in the presence of the inferior guest n ‐tridecane; on irradiation at 410 nm for 80 min the guests are completely exchanged, with n ‐tridecane encapsulated and the E isomer of 3 present in solution. Heating that solution to 160 °C for 6 min restores the starting state.…”

“…Three social isomers of p ‐cymene are possible in 1⋅2 4 ⋅1 , but only two are observed, as previously described26 (only one social isomer is depicted in Figure 2). The syntheses of HTIs 3 and 4 are given in the Supporting Information and follow established literature procedures19, 20, 25, 27 starting from commercially available p ‐toluenethiol.…”