Multimetallic complexes having π-conjugated dithiolate ligands have recently received attention because of their unique solid-state properties. Reported herein are efficient and versatile routes for the synthesis of structurally well-defined multimetallic gold–bis(dithiolene) complexes. A dichlorogold(III) complex having a benzene-1,2-dithiolate ligand was prepared as a key terminal unit. A one-dimensional dimetallic gold complex was synthesized in good yield by using benzene-1,2,4,5-tetrathiolate as a bridging ligand. Furthermore, by using benzenehexathiolate as a bridging ligand, this strategy was applied to the synthesis of a two-dimensional trimetallic complex with a starburst structure. The solid-state structures of the anionic complexes were unambiguously confirmed by X-ray diffraction analyses.

An open-cage C₆₀ tetraketone with a large opening was able to encapsulate N₂ and CO₂ molecules after its exposure to high pressures of N₂ and CO₂ gas. A subsequent selective reduction of one of the four carbonyl groups on the rim of the opening induced a contraction of the opening (2) and trapped the guest molecules inside 2. The thus-obtained host–guest complexes N₂@2 and CO₂@2 could be isolated by recycling HPLC, and were found to be stable at room temperature. The molecular structures of N₂@2 and CO₂@2 were determined by single-crystal X-ray diffraction analyses, and revealed a short NN triple bond for the encapsulated N₂, as well as an unsymmetric molecular structure for the encapsulated molecule of CO₂. The IR spectrum of CO₂@2 suggested that the rotation of the encapsulated molecule of CO₂ is partially restricted, which was supported by DFT calculations.

An open-cage C₆₀ tetraketone with a large opening was able to encapsulate N₂ and CO₂ molecules after its exposure to high pressures of N₂ and CO₂ gas. A subsequent selective reduction of one of the four carbonyl groups on the rim of the opening induced a contraction of the opening (2) and trapped the guest molecules inside 2. The thus-obtained host–guest complexes N₂@2 and CO₂@2 could be isolated by recycling HPLC, and were found to be stable at room temperature. The molecular structures of N₂@2 and CO₂@2 were determined by single-crystal X-ray diffraction analyses, and revealed a short NN triple bond for the encapsulated N₂, as well as an unsymmetric molecular structure for the encapsulated molecule of CO₂. The IR spectrum of CO₂@2 suggested that the rotation of the encapsulated molecule of CO₂ is partially restricted, which was supported by DFT calculations.

Dimers of partially oxygen-bridged triarylamines were designed and synthesized as hole-transporting materials. X-ray structural analyses revealed that these compounds form on-top π-stacking aggregates in the crystalline state. TRMC measurements showed that high levels of anisotropic charge transport were induced in the direction of the π-stacking. Surprisingly, even in vacuum-deposited amorphous films, these compounds retained some of the face-on π-stacking, thus facilitating an out-of-plane carrier mobility.