Efficient light-induced phase transitions in halogen-bonded liquid crystals

Francisco Pernandez-Palacio; Mikko Poutanen; Marco Saccone; Antti Siiskonen; Giancarlo Terraneo; Giuseppe Resnati; Olli Ikkala; Pierangelo Metrangolo; Arri Priimagi

doi:10.1021/acs.chemmater.6b03460

Efficient light-induced phase transitions in halogen-bonded liquid crystals

Francisco Pernandez-Palacio
, Mikko Poutanen
, Marco Saccone^*
, Antti Siiskonen
, Giancarlo Terraneo
, Giuseppe Resnati
, Olli Ikkala
, Pierangelo Metrangolo^*
, Arri Priimagi

^*Corresponding author for this work

VTT Technical Research Centre of Finland

Polytechnic University of Milan
Aalto University
Tampere University of Technology (TUT)
VTT (former employee or external)

Research output: Contribution to journal › Article › Scientific › peer-review

52 Citations (Scopus)

Abstract

Here, we present a new family of light-responsive, fluorinated supramolecular liquid crystals (LCs) showing efficient and reversible light-induced LC-to-isotropic phase transitions. Our materials design is based on fluorinated azobenzenes, where the fluorination serves to strengthen the noncovalent interaction with bond-accepting stilbazole molecules, and increase the lifetime of the cis-form of the azobenzene units. The halogen-bonded LCs were characterized by means of X-ray diffraction, hot-stage polarized optical microscopy, and differential scanning calorimetry. Simultaneous analysis of light-induced changes in birefringence, absorption, and optical scattering allowed us to estimate that

Original language	English
Pages (from-to)	8314-8321
Journal	Chemistry of Materials
Volume	28
Issue number	22
DOIs	https://doi.org/10.1021/acs.chemmater.6b03460
Publication status	Published - 2016
MoE publication type	A1 Journal article-refereed

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10.1021/acs.chemmater.6b03460

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title = "Efficient light-induced phase transitions in halogen-bonded liquid crystals",

abstract = "Here, we present a new family of light-responsive, fluorinated supramolecular liquid crystals (LCs) showing efficient and reversible light-induced LC-to-isotropic phase transitions. Our materials design is based on fluorinated azobenzenes, where the fluorination serves to strengthen the noncovalent interaction with bond-accepting stilbazole molecules, and increase the lifetime of the cis-form of the azobenzene units. The halogen-bonded LCs were characterized by means of X-ray diffraction, hot-stage polarized optical microscopy, and differential scanning calorimetry. Simultaneous analysis of light-induced changes in birefringence, absorption, and optical scattering allowed us to estimate that",

author = "Francisco Pernandez-Palacio and Mikko Poutanen and Marco Saccone and Antti Siiskonen and Giancarlo Terraneo and Giuseppe Resnati and Olli Ikkala and Pierangelo Metrangolo and Arri Priimagi",

year = "2016",

doi = "10.1021/acs.chemmater.6b03460",

language = "English",

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pages = "8314--8321",

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issn = "0897-4756",

publisher = "American Chemical Society ACS",

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T1 - Efficient light-induced phase transitions in halogen-bonded liquid crystals

AU - Pernandez-Palacio, Francisco

AU - Poutanen, Mikko

AU - Saccone, Marco

AU - Siiskonen, Antti

AU - Terraneo, Giancarlo

AU - Resnati, Giuseppe

AU - Ikkala, Olli

AU - Metrangolo, Pierangelo

AU - Priimagi, Arri

PY - 2016

Y1 - 2016

N2 - Here, we present a new family of light-responsive, fluorinated supramolecular liquid crystals (LCs) showing efficient and reversible light-induced LC-to-isotropic phase transitions. Our materials design is based on fluorinated azobenzenes, where the fluorination serves to strengthen the noncovalent interaction with bond-accepting stilbazole molecules, and increase the lifetime of the cis-form of the azobenzene units. The halogen-bonded LCs were characterized by means of X-ray diffraction, hot-stage polarized optical microscopy, and differential scanning calorimetry. Simultaneous analysis of light-induced changes in birefringence, absorption, and optical scattering allowed us to estimate that

AB - Here, we present a new family of light-responsive, fluorinated supramolecular liquid crystals (LCs) showing efficient and reversible light-induced LC-to-isotropic phase transitions. Our materials design is based on fluorinated azobenzenes, where the fluorination serves to strengthen the noncovalent interaction with bond-accepting stilbazole molecules, and increase the lifetime of the cis-form of the azobenzene units. The halogen-bonded LCs were characterized by means of X-ray diffraction, hot-stage polarized optical microscopy, and differential scanning calorimetry. Simultaneous analysis of light-induced changes in birefringence, absorption, and optical scattering allowed us to estimate that

U2 - 10.1021/acs.chemmater.6b03460

DO - 10.1021/acs.chemmater.6b03460

M3 - Article

SN - 0897-4756

VL - 28

SP - 8314

EP - 8321

JO - Chemistry of Materials

JF - Chemistry of Materials

IS - 22

ER -

Efficient light-induced phase transitions in halogen-bonded liquid crystals

Abstract

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