Folding-induced exciton coupling in homo- and heterodimers of merocyanine dyes
作者:David Bialas、Eva Kirchner、Frank Würthner
DOI:10.1039/c6cc00221h
日期:——
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 [small pi]-stacked structures in solvents of low...
Bis(merocyanine) Hetero‐Folda‐Dimers: Evaluation of Exciton Coupling between Different Types of π‐Stacked Chromphores
作者:Eva Kirchner、David Bialas、Frank Würthner
DOI:10.1002/chem.201901757
日期:——
coupling between differenttypes of chromophores has been rarely investigated. Herein, a systematic study on the exciton coupling between merocyanine chromophores of differentconjugation length with varying excited state energies is presented. In this work well-defined hetero-dimer stacks were obtained upon folding of bis(merocyanine) dyes in nonpolar solvents. They show distinctly different absorption
NIR-Absorbing Merocyanine Dyes for BHJ Solar Cells
作者:André Zitzler-Kunkel、Martin R. Lenze、Nils M. Kronenberg、Ana-Maria Krause、Matthias Stolte、Klaus Meerholz、Frank Würthner
DOI:10.1021/cm502302s
日期:2014.8.26
We have synthesized a series of new, polymethine chain extended merocyaninedyes 1–4 bearing varied acceptor units and an aminothiophene donor moiety. The optical and electronic properties of these newmerocyanines have been studied in comparison with their corresponding lower homologues 5–8, which contain two methine groups less, by UV–vis and electro-optical absorption (EOA) spectroscopy and cyclic
comprising chromophores of different conjugationlengths has been synthesized and the intramolecular aggregation process was investigated by UV/Vis absorption spectroscopy. The spectral changes observed upon variation of the solvent polarity reveal a folding process resulting in a cofacial π-stack of two chromophores with a decrease of the aggregation tendency with increasing chromophorelength and solvent