A combination of luminescence processes in dual-emission properties by selecting preparation protocols is designed but also temperature-driven switching of luminescence processes in dual-emission properties based on a bis-o-carborane-substituted anthracene triad in crystals.

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The control of solid-state dual emission by employing hydrogen bonding is the most significant result of this study. Basically, dualemission properties are useful for designing advanced luminescent materials, such as white-light luminescent materials and ratiometric luminescent bioprobes. However, it is very rare to observe dual emission in solids due to concentration quenching as well as rapid energy transfer in the condensed state. We overcame the concentration quenching problem by applying the aryl-o-carborane triad. In this study, we introduced an intramolecular CH•••O interaction site to delay relaxation to the ICT state and so retain LE emission. This should be a rational strategy to design dual emission materials.