Organic dopant cyclization and significantly improved RTP properties.

ABSTRACT: The internal rotation of triplet-generating molecules is detrimental to room temperature phosphorescence (RTP) radiation, and this rotation is usually mitigated by doping into rigid microenvironments. The chemical locking of internal rotation units in advance should be an effective strategy but is rarely studied in comparison. Herein, a triplet-generating molecule with two rotatable phenyls (DIA) was designed, synthesized, and then cyclized using two types of bonding bridges. We found that DIA/PMMA film shows little observable RTP afterglow despite a 148 ms lifetime, whereas carbon bridge cyclized DIA (CDIA) and oxygen bridge cyclized DIA (ODIA) emitted green and blue ultralong RTP in PMMA film, with lifetimes of 2146 ms and 2656 ms, respectively, demonstrating the potent role of pre-locki

SUBMITTER: Zhang S 

PROVIDER: S-EPMC11575563 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature