TARTARIC ACID-HYDROGEN CRYSTAL STRUCTURE HAVING NON-LINEAR SECONDARY EFFECT, PRODUCTION OF SAID CRYSTAL STRUCTURE AND DEVICE INCLUDING SAID CRYSTAL STRUCTURE AND HAVING ELECTRICALLY OPTICAL EFFECT

摘要

The invention relates to new crystalline structures of left or right monohydrogentartrates exhibiting quadratic nonlinear effects and a wide transparency range extending from the visible to the near infrared, consisting of optionally substituted 2-amino-5-nitropyridinium cations used in combination with a polyanionic organic matrix made up of left or right monohydrogentartrate anions. It also relates to a process for the preparation of these crystalline structures, consisting in mixing one mole of the cation base with at least two moles of left and/or right tartaric acid. Finally, it relates to an electrooptical effect device comprising said crystalline structure.