Temperature-Controlled Switchable Photochromism in Solid Materials

Alex Julià-López, Jordi Hernando, Daniel Ruiz-Molina, Pablo González-Monje, Josep Sedó, Claudio Roscini

Research output: Contribution to journalArticleResearchpeer-review

31 Citations (Scopus)

Abstract

© 2016 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim A novel strategy to achieve thermally switchable photochromism in solid materials is reported, which relies on the preparation of polymeric core–shell capsules containing solutions of photochromic dyes in acidic phase-change materials. Upon changing the phase (solid or liquid) of the encapsulated medium, one of the two photochromic states of the system is selectively stabilized on demand, allowing for reversible interconversion between direct and reverse photochromism when thermally scanning through the melting temperature of the phase-change material. This strategy, which does not require the addition of external agents or chemical modification of the dyes, proved to be general for different spiropyran photochromes and to be applicable to the fabrication of a variety of functional materials by simply embedding the capsules obtained into a solid matrix of choice.
Original languageEnglish
Pages (from-to)15044-15048
JournalAngewandte Chemie - International Edition
Volume55
Issue number48
DOIs
Publication statusPublished - 1 Jan 2016

Keywords

  • encapsulation
  • optical switches
  • phase transitions
  • photochromism
  • thermochromism

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