[2.2]パラシクロファンが拓く光化学

抄録

Since the first synthesis of [2.2]paracyclophanes in 1949, a wide variety of the derivatives have been synthesized, and their physical properties have been extensively investigated. However, there have not been many cases in which [2.2]paracyclophanes have been applied beyond the field of organic chemistry and organometallic chemistry. In the first half of this paper, the through-space conjugation and photoluminescence properties of π-stacked molecules (polymers and oligomers) consisting of [2.2]paracyclophane as a key unit are introduced. One of the characteristics of the [2.2]paracyclophane skeleton is planar chirality without chiral center(s). Due to the suppressed rotational motion of benzene rings in [2.2]paracyclophane, it exhibits planar chirality depending on the substitution position(s). In the latter half, circularly polarized luminescence (CPL) profiles of some optically active π-stacked molecules based on the planar chiral [2.2]paracyclophane moiety are introduced.