Strategy towards large two-photon absorption cross-sections for diketopyrrolopyrroles†
Anna Purc
Journal of Materials Chemistry C Pub Date : 11/28/2014 00:00:00 , DOI:10.1039/C4TC02375G
Abstract

Three quadrupolar donor–acceptor–donor compounds bearing diketopyrrolopyrroles as a central core and exceptionally electron-rich diarylaminofurans and dialkylaminobenzofuran as donors were designed. Straightforward synthesis afforded these dyes in good overall yield. These donor–acceptor–donor systems turned out to be strong red-emitters with fluorescence extending well into the NIR region. Two-photon brightness (850–1900 GM) was found to be larger than for any previously studied diketopyrrolopyrrole dyes.

Graphical abstract: Strategy towards large two-photon absorption cross-sections for diketopyrrolopyrroles