Going beyond the borders: pyrrolo[3,2-b]pyrroles with deep red emission

Abstract

Ladder-type heterocycles encompassing two B−–N+ dative bonds possess intense green to red emission, large 2PA cross-sections and superb photostability.

Multiple-boron–nitrogen (multi-BN) doped π-conjugated systems for optoelectronics

“…44). 198 These dyes exhibited superb photostability and high post-functionalization capability; a variety of R groups in compounds 145 and 146 were introduced with tunable photophysical properties. Large two-photon absorption cross sections were observed in these dyes.…”

Facile metal-free synthesis of pyrrolo[3,2-b]pyrrolyl-based conjugated microporous polymers for high-performance photocatalytic degradation of organic pollutants

“…[53][54][55][56][57][58][59][60][61][62][63][64][65] Because of their photophysical properties, pyrrolo [3,2-b]pyrroles have been used in various electronic devices, including transistors, solar cells, and electrochromic devices. [66][67][68] Moreover, the pyrrolo[3,2-b] pyrrole structure is believed to be the most effective electron donor among the known 10π-electron systems, including thieno[3,2-b]pyrrole and thieno [3,2-b]thiophene. 69 With all of these advantages, we are gratified that our new approach opens the door to novel Py-CMPs, which are difficult to prepare directly from pyrrolo[3,2-b]pyrrolyl monomers.…”

Multifunctional Heteropentalenes: From Synthesis to Optoelectronic Applications

“…The combination of this fact with the presence of highly reactive, electron-rich positions 3 and 6 prone to electrophilic aromatic substitutions opens a plethora of structural opportunities ( 9 – 17 , Figure ). In particular, this was exploited via various ring-closing reactions. It even turned out to be possible to connect all six substituents present at positions 1, 2, 3, 4, 5, and 6, creating an oval-shaped π-expanded DHPP 17 possessing a bowl shape …”