Facile dione protection to benzo[1,2-b:6,5-b']dithiophene-4,5-dione (BDTD) in triggering ultraviolet emission - A new member of the emissive 3,3'-bridged dithiophenes.

ABSTRACT: To date, 3,3'-bridged dithiophenes with bridges developed from the first period elements (either pristine or oxidised) are non emissive. Benzo[1,2-b:6,5-b']dithiophene-4,5-dione (BDTD) is a typical 3,3' fused-dithiophene with a dione bridge. It is a critical building block for semiconducting materials, and it is non emissive. We serendipitously discovered that by protecting the diketone of BDTD with ethylene glycol, two isomers (BDTD-5 and 6) were obtained and both compounds effectively emit UV light in solution. Their maximum emission (382 and 375 nm for BDTD-5 and 6, respectively) are independent of the type of solvent. Both compounds exhibited fluorescence intensity enhancement in DMF-H₂O with the increase of water fraction from 0-90%. BDTD-6 can also effectivel

SUBMITTER: Li C 

PROVIDER: S-EPMC9900312 | biostudies-literature | 2023 Jan

REPOSITORIES: biostudies-literature