title: Folding-induced exciton coupling in homo- and heterodimers of merocyanine dyes.
abstract: Two identical or different merocyanine dyes were tethered by a rigid diphenylacetylene spacer unit that enables the folding of the two dyes into co-facially π-stacked structures in solvents of low polarity. Whilst the solvent-dependent absorption spectra of homodimers of identical dyes are easily interpreted as H-aggregates by exciton theory, the spectra of the heterodimers constitute a novel and more interesting case.
authors.affiliation: Universität Würzburg, Institut für Organische Chemie & Center for Nanosystems Chemistry, Am Hubland, 97074 Würzburg, Germany. wuerthner@chemie.uni-wuerzburg.de.
authors.forename: David
authors.initials: D
authors.lastname: Bialas
authors.forename: Eva
authors.initials: E
authors.lastname: Kirchner
authors.forename: Frank
authors.initials: F
authors.lastname: Würthner
mesh_terms: D019281:Dimerization; D011744:Pyrimidinones / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet
chemical_list: D011744:Pyrimidinones; C003954:merocyanine dye