Fig. 1: Representative orange-red/deep-red MR molecules.
From: Sulfur-locked multiple resonance emitters for high performance orange-red/deep-red OLEDs

a The typical orange-red/deep-red MR molecules with para B-π-B structures. b Synthesis methods and molecular structures of S-BN and 2S-BN. Right: The crystal structure of 2S-BN.