title: Dipyreno- and diperyleno-anthracenes from glyoxylic Perkin reactions.
abstract: Twofold Perkin condensation of 2,5-dibromophenylene-1,4-diacetic acid with arylglyoxylic acids followed by cyclo-dehydrobromination leads to dipyreno- and diperyleno-anthracene tetraesters and diimides. The imides show surprisingly large absorption shifts versus the esters, illustrating that electron-withdrawing substituents at the anthracene unit efficiently impart long wavelength absorption in such electron-deficient graphene nanoribbon fragments.
authors.affiliation: Centre de Recherche Paul Pascal, Centre National de la Recherche Scientifique, Université de Bordeaux, 115 avenue Schweitzer, 33600 Pessac, France.
authors.forename: Parantap
authors.initials: P
authors.lastname: Sarkar
authors.forename: Fabien
authors.initials: F
authors.lastname: Durola
authors.forename: Harald
authors.initials: H
authors.lastname: Bock
mesh_terms: D000873:Anthracenes / Q000138:chemical synthesis* / Q000737:chemistry; D003500:Cyclization; D006038:Glyoxylates / Q000737:chemistry*; D015394:Molecular Structure
chemical_list: D000873:Anthracenes; D006038:Glyoxylates; C031150:glyoxylic acid