TY - JOUR
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 -