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Spiropyran Main-Chain Conjugated Polymers

  1. Michael Sommer1,*,
  2. Hartmut Komber2

Article first published online: 21 NOV 2012

DOI: 10.1002/marc.201200688

Issue

Macromolecular Rapid Communications

Macromolecular Rapid Communications

Volume 34, Issue 1, pages 57–62, January 11, 2013

Additional Information

How to Cite

Sommer, M. and Komber, H. (2013), Spiropyran Main-Chain Conjugated Polymers. Macromol. Rapid Commun., 34: 57–62. doi: 10.1002/marc.201200688

Author Information

  1. 1

    Makromolekulare Chemie, Universität Freiburg, Stefan-Meier-Straße 31, 79100 Freiburg, Germany; Freiburger Materialforschungszentrum, Stefan Meier-Strasse 21, 79100 Freiburg, Germany

  2. 2

    Leibniz Institut für Polymerforschung Dresden e.V., Hohe Straße 6, 01069 Dresden, Germany

*Makromolekulare Chemie, Universität Freiburg, Stefan-Meier-Straße 31, 79100 Freiburg, Germany; Freiburger Materialforschungszentrum, Stefan Meier-Strasse 21, 79100 Freiburg, Germany.

Publication History

  1. Issue published online: 2 JAN 2013
  2. Article first published online: 21 NOV 2012
  3. Manuscript Revised: 27 OCT 2012
  4. Manuscript Received: 17 OCT 2012

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Keywords:

  • conjugated polymers;
  • mechano-responsive;
  • smart materials;
  • spiropyran;
  • sonochemistry

Abstract

The first main-chain conjugated copolymers based on alternating spiropyran (SP) and 9,9-dioctylfluorene (F8) units synthesized via Suzuki polycondensation (SPC) are presented. The reaction conditions of SPC are optimized to obtain materials of type P(para-SP-F8) with appreciably high molecular weights up to Mw ≈ 100 kg mol−1. 13C NMR is used to identify the random orientation of the non-symmetric SP unit in P(p-SP-F8). Ultrasound-induced isomerization of P(p-SP-F8) to the corresponding merocyanine form P(p-MC-F8) yields a deep-red solution. This isomerization reaction is followed by 1H NMR in solution using sonication, whereby the color increasingly changes to deep red. The possibility to incorporate multiple SP units into main-chain polymers significantly broadens existing SP-based polymeric architectures.

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