Taming Macromolecules with Light: Lessons Learned from Vibrational Spectroscopy

Jaana Vapaavuori, C. Geraldine Bazuin, Christian Pellerin

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Exciting new applications, from large-area nanopatterning and templating to soft light-powered robotics, are emerging from the fundamental research on light-triggered changes in macromolecular systems upon photoisomerization of azobenzene-based molecular photoswitches. The understanding of how the initial molecular-scale photoisomerization of azobenzene, a complex photochemical event in itself, is translated into the response of macromolecules and even into macroscopic-scale motion of illuminated azomaterials is an enormous task. The focus here is on how this knowledge has advanced by applying different vibrational spectroscopy techniques that provide rich molecular insight into the photoresponse of chemically specific molecular moieties. In particular, infrared and Raman spectroscopy studies are highlighted, in the context of phototriggered perturbation of self-assembled structures and photoinduced linear and circular anisotropy, as well as photoinduced surface patterning, with the objective of offering a perspective on how vibrational spectroscopy can help in answering an array of essential yet unsettled questions.

Original languageEnglish
Article number1700430
Number of pages15
JournalMacromolecular Rapid Communications
Volume39
Issue number1
DOIs
Publication statusPublished - 2018
MoE publication typeA1 Journal article-refereed

Keywords

  • azopolymers
  • photoinduced anisotropy
  • photoisomerization
  • surface relief gratings
  • vibrational spectroscopy
  • LIQUID-CRYSTALLINE POLYMERS
  • SURFACE-RELIEF GRATINGS
  • HOLOGRAPHIC DIFFRACTION GRATINGS
  • DEPENDENT INFRARED-SPECTROSCOPY
  • AZOBENZENE-CONTAINING MATERIALS
  • NONLINEAR-OPTICAL PROPERTIES
  • ENHANCED RAMAN-SPECTROSCOPY
  • LANGMUIR-BLODGETT-FILMS
  • SIDE-CHAIN
  • PHOTOINDUCED ORIENTATION

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