Highly Polarized 1,4-Dihydropyrrolo[3,2-b]Pyrroles: From Synthesis to Photophysics and Two-Photon Induced Polymerization.
A series of ladder-type, highly polarized functional dyes possessing 1,4-dihydropyrrolo[3,2-b]pyrrole (DHPP) scaffold was synthesized in a straightforward manner. All dyes have a quadrupolar, centrosymmetric architecture and two five-membered rings adjacent to a central electron-rich DHPP core, but they differ in the s...