Advanced Materials, Vol.5, No.2, 120-124, 1993
QUASI-PERFECT POLAR ALIGNMENT OF NONLINEAR CHROMOPHORES IN A CRYSTALLINE H-BONDED GUEST HOST STRUCTURE -2-AMINO-5-NITROPYRIDINIUM-L-MONOHYDROGENTARTRATE
The nonlinear optical properties of organo-mineral salts based oil 2-amino-5-nitropyridine (2A5NP) and tartrate anions are presented. The mineral anion provides improved structural cohesion compared to van der Waals or hydrogen-bonded organic molecular crystals while the organic species is responsible for the nonlinear optical activity. 2A5NP is known to exhibit high molecular hyperpolarizability and blue-Shifted absorption relative to p-nitroanililine-like molecules.