Preparation and photophysical properties of monomeric liquid-crystalline azo-dyes embedded in bulk and film SiO2-sonogel glasses

  title={Preparation and photophysical properties of monomeric liquid-crystalline azo-dyes embedded in bulk and film SiO2-sonogel glasses},
  author={V{\'i}cente Torres-Zu{\~n}iga and Omar G. Morales-Saavedra and Ernesto Rivera and Rosalba Casta{\~n}eda-Guzm{\'a}n and J. Guadalupe Ba{\~n}uelos and R. Ortega-Mart{\'i}nez},
  journal={Journal of Sol-Gel Science and Technology},
SiO2-based bulk and film sol–gel hybrid materials were prepared with a family of novel liquid crystalline (LC) amphiphilic azo-dyes bearing oligo(ethylene glycol) spacers (named here RED-PEG-n, n = 2, 3, 4, 6). The catalyst-free-sonogel route was implemented to produce optically active hybrid monoliths and spin-coated films with these materials. Comprehensive morphological, thermal, photo-acoustic and spectroscopic sample characterizations were performed in order to elucidate the physical… 
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