A Donor‐Acceptor Molecular Octopus and the CLICK Procedure in Columnar Liquid Crystal Phases

Abstract: Two star‐shaped mesogens with a (meso‐tetraphenylporphinato) zinc (II) core and bithiophene conjugated arms with 3,4,5‐trisdodecyloxyphenyl periphery were synthesized. One of these molecules was decorated with four fullerenes via an aliphatic spacer. This is the sterically overcrowded compound with an octapodal morphology. The other star lacks the fullerenes and provides free space between the conjugated arms. This mesogen does not aggregate in solution, but in solid state it forms a hexagonal columnar and a highly ordered oblique helical columnar phase, while the octopus molecule assembles in an amorphous solid. Photophysical studies of the octapodal compound in solution and the solid thin film reveal the formation of J‐type aggregates, in which the interaction between donors (porphyrin) and acceptors (fullerene) dominates leading to absorption bands in the NIR region of the spectra. The mixture of both compounds results in a self‐assembly which is called the Click procedure. Fullerenes of the octopus nanosegregate in the pockets of the star mesogens generating hexagonal columnar structures with a regular stacking along the columnar axis. Thus providing free space is a tool to control the competition between supramolecular interactions and nanosegregation. Such liquid‐crystalline donor‐acceptor structures may play a role in future LC photovoltaic applications.

Standort
Deutsche Nationalbibliothek Frankfurt am Main
Umfang
Online-Ressource
Sprache
Englisch

Erschienen in
A Donor‐Acceptor Molecular Octopus and the CLICK Procedure in Columnar Liquid Crystal Phases ; day:03 ; month:09 ; year:2024 ; extent:12
Chemistry - a European journal ; (03.09.2024) (gesamt 12)

Urheber
Lehmann, Matthias
Reber, Lisa
Fink, Leonard
Adelmann, Juliane

DOI
10.1002/chem.202401349
URN
urn:nbn:de:101:1-2409031422589.246298537314
Rechteinformation
Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
Letzte Aktualisierung
15.08.2025, 07:27 MESZ

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Beteiligte

  • Lehmann, Matthias
  • Reber, Lisa
  • Fink, Leonard
  • Adelmann, Juliane

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