Proton-Activated Amorphous Room-Temperature Phosphorescence for Humidity Sensing and High-Level Data Encryption

Graphical Supramolecular co-assembling terpyridine-derivatives with laponite® nanoclay are exploited to acquire the efficient amorphous room-temperature phosphorescence (RTP), which display distinctive RTP performance (green RTP for 1 @ LP and blue-green RTP for 2 @ LP) . Owing to their distinctive RTP performance, the RH sensing and high-level data encryption are achieved. Supramolecular co-assembling terpyridine-derivatives with nanoclay ( LP ) are exploited to acquire efficient amorphous room-temperature phosphorescence (RTP). Experimental and theoretical investigations reveal that this co-assembly not only brings about a configuration transformation from the trans-trans ( a ) to the cis-trans ( a′′ ) form via the protonating process, significantly narrowing the singlet-triplet energy gap, thereby effectively facilitating the single-triplet ISC processes, but also well protects the triplet state and suppresses the nonradiative transitions via restricting molecular rotation and vibration by the hydrogen-bond interactions between them. Additionally, the flexible and transparent films, through co-assembling 1 @ LP (or 2 @ LP ) with polyvinyl alcohol (PVA), also display excellent phosphorescence performance. Owing to their distinctive RTP performances, the RH sensing and high-level data encryption are achieved.