To address the issue, single crystal structures of 7 were compared at different temperatures. This revealed exciting changes in the intermolecular short interactions while changing the temperature from 110 K to 300 K with an increase in the average short intermolecular distance. The number of different short-contact interactions drastically reduced from 15 to 5 upon going from 110 K to 300 K, along with an increase in the average intermolecular short-contact distance from 2.793 Å to 2.845 Å. Altogether, the loss of intermolecular interactions and the increase of the distance between tpe (tpe = tetraphenylethylene) units appeared to be the sole reason for reducing the efficiency of energy transfer between tpe units, deactivating the nonradiative decay and giving rise to a remarkable increase in the PL intensity.