Other Physical Properties and Possible Applications of Metallomesogens

Azo Isocyanide Gold(I) Liquid Crystals, Highly Birefringent and Photosensitive in the Mesophase

“…We have also studied the birefringence of compounds 2b , 3b , and 4b , containing the same azo isocyanide ligand (alkoxy chain n = 8), to see the effect of coordination. The effect of the metal fragment depends on the structure of the molecule, in fact complexes with birefringence values higher, similar or lower than the free ligands have been described . In our case the three compounds display very high birefringence, which is characteristic of materials based on azo molecules .…”

“…The effect of the metal fragment depends on the structure of the molecule, in fact complexes with birefringence values higher, similar or lower than the free ligands have been described. 33 In our case the three compounds display very high birefringence, which is characteristic of materials based on azo molecules. 34 The measured values of Δn are 0.32 for the free ligand 2b at 80 °C (N mesophase); 0.…”

Metallomesogens as potential materials for improvement of electro-optical properties of commercial liquid crystals

“…Also, few scientific and patent literature have reported on some rod-like and discotic MOMs as dichroic dyes, non-linear optics, thermal recording, thermochromism, passive optical filters, photo-sensing, laser addressing, optical and thermal recording, polarizing flms, radiation absorbing films, ferroelectricity, ferro-magneticity, electro-conductivity, reaction catalysts, mesogenic intermediates, ink jet and security printing, medicinal and agricultural materials. [21][22][23][24][25][26][27][28][29][30] In spite of these proposed applications, until now MOM material have not been yet appeared for even simple commercial guest-host liquid crystal devices. Among the major draw backs of existing MOMs are their high transition temperatures, decomposition at high temperature, inaccessible mesophase range and low chemical stability.…”