A novel aggregation-induced phosphorescent emission (AIPE) was observed for iridium(III) complexes. This interesting phenomenon was attributed to the intermolecular packing, resulting in a switch from the non-emissive 3LX excited state to the emissive 3MLLCT transition, which is confirmed by X-ray diffraction studies as well as theoretical calculations.

We reported here the two-component self-assembling building blocks capable of forming lyotropic liquid crystal and liquid-crystalline physical gel. One of the components has a molecular characteristic of C3C3-symmetrical trisureas containing three azobenzene groups, which can form liquid-crystal phase in a temperature range of 133–215 °C. Another one has a trisamide core, which can self-aggregate to fibrous network through hydrogen bonds of amide moieties. The mixture of these two components performs lyotropic liquid crystal as well as liquid-crystalline physical gel in a temperature range larger than that of sole compound, suggesting that the cooperation of hydrogen bonds between these components stabilizes the mesophase of the assembly. The mechanism of formation of the mesophase was investigated by infrared spectra and small-angle X-ray scatterings.The cooperation of intermolecular interaction between C3C3-symmetrical trisurea compounds and trisamide gelator stabilizes the mesophases of the assembly; thus performs LCs and LC physical gel in a large temperature range.

A novel aggregation-induced phosphorescent emission (AIPE) was observed for iridium(III) complexes. This interesting phenomenon was attributed to the intermolecular packing, resulting in a switch from the non-emissive 3LX excited state to the emissive 3MLLCT transition, which is confirmed by X-ray diffraction studies as well as theoretical calculations.