The role of the dipolar neighborhood on the relaxation dynamics of multichromophoric merocyanines. Issue 29 (8th July 2016)

• Record Type: Journal Article
• Authors: Koch, Federico; Steinbacher, Andreas; Consani, Cristina; Zitzler-Kunkel, André; Stolte, Matthias; Würthner, Frank; Brixner, Tobias
• Is Part Of: Physical chemistry chemical physics. Volume 18:Issue 29(2016)
• Page Start: 19820
• Page End: 19831
• Publication Date: 2016-07-08
• Subjects: Chemistry, Physical and theoretical -- Periodicals; 541.3
• DOI: 10.1039/c6cp02437h
• Languages: English
• ISSNs: 1463-9076

Abstract

Abstract : The interactions of neighboring, highly dipolar merocyanine dyes lead to stabilization of the intramolecular charge-transfer state. Abstract : The interactions between different chromophores within a molecular system are crucial to comprehend relaxation dynamics, regardless if one deals with small molecules or larger systems like polymers or aggregates. We investigate a series of merocyanine molecules that contain one, two or three highly dipolar ( μ g = 13.1 D) dyes in close vicinity to study the influence and origin of interactions, e.g., electronic, vibronic, or the formation of excitons. Relaxation dynamics are probed via transient absorption and coherent two-dimensional spectroscopy. Furthermore, we derive a general relaxation model which can be applied for all merocyanines under investigation and can be used as a reference point for other dipolar donor–acceptor dyes. The intramolecular charge-transfer state of the monomeric merocyanine is stabilized by dipolar neighbor molecules in the bis- and tris-chromophoric dyes.