5606-11-1Relevant academic research and scientific papers
H-bonded complexes containing 1,3,4-oxadiazole derivatives: Mesomorphic behaviour, photophysical properties and chiral photoinduction
Vieira, Andre A.,Cavero, Emma,Romero, Pilar,Gallardo, Hugo,Serrano, Jose Luis,Sierra, Teresa
supporting information, p. 7029 - 7038 (2014/08/18)
Two series of new V-shaped acids derived from 1,3,4-oxadiazoles are described. These acids were used to prepare supramolecular complexes through hydrogen bonding with 2,4-diamino-6-dodecylamino-1,3,5-triazine in a 3:1 ratio, respectively. The formation of the complexes was studied by infrared and NMR techniques. The thermal behaviour and mesomorphic properties of all the complexes were investigated by polarized light optical microscopy, differential scanning calorimetry and X-ray diffraction. Hexagonal and rectangular columnar mesophases were observed for all complexes at room temperature, without evidence of crystallization. The results of circular dichroism studies allowed us to propose that in the liquid crystalline state these materials adopt a helical columnar organization and this chirality can be controlled by irradiation with CPL. Furthermore, the complexes display strong blue luminescence in solution and in the mesophase. the Partner Organisations 2014.
Propeller-like hydrogen-bonded banana-melamine complexes inducing helical supramolecular organizations
Barbera, Joaquin,Puig, Laura,Romero, Pilar,Serrano, Jose Luis,Sierra, Teresa
, p. 4487 - 4492 (2007/10/03)
The results of the study presented here show a new example of the use of liquid crystals and the interactions involved in the mesomorphic state to build up complex molecular organizations. We have pursued a design strategy in which hydrogen bonding allows
Method for modifying 1,3,5-triazine derivatives
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, (2008/06/13)
PCT No. PCT/JP96/03762 Sec. 371 Date Jun. 22, 1998 Sec. 102(e) Date Jun. 22, 1998 PCT Filed Dec. 24, 1996 PCT Pub. No. WO97/24338 PCT Pub. Date Jul. 10, 1997A method for modifying 1,3,5-triazine derivatives characterized by heating and reacting a 1,3,5-triazine derivatives having at least one amino or mono-substituted amino group on a carbon atom or atoms on its ring with an alcohol in the presence of a metal catalyst and a hydrogen atom to introduce an alkyl group or an alkenyl group into each amino or mono-substituted amino group; another method for modifying 1,3,5-triazine derivatives characterized by heating and reacting a 1,3,5-triazine derivatives having at least one amino or mono-substituted amino group on a carbon atom or atoms on its ring with a dihydric alcohol in the presence of a metal catalyst and a hydrogen atom to introduce an alkyl group having a hydroxyl group into each amino or mono-substituted amino group; and 1,3,5-triazine derivatives obtained by the methods. The various modified sustituted 1,3,5-triazine derivatives thus produced are generally obtained as a mixture. These derivatives can be isolated as compounds having high-purity by a normal separation method for organic compounds, and the compounds are usable in the various applications mentioned in the specification.
