This invention is about the preparation of a kind of L- nonlinear optics malic acid derivant material. It runs as follows: put the L- nonlinear optics malic into the Asolvent,well mixed and dissolved, control the solution concentration at 0.5g/ml-1.5g/ml. then put the alkality reactant in and control the reaction temperature, the mol ratio alkality reactant/L- nonlinear optics malic is 1:3-3:1; When the reaction finished, drop the B solvent in till the solution turbid, and warm it up, then it goes back clarify, and at the same time put it into the thermostat water bath. Get it out a few hours later and keep it cool in the air, when the crystal came out, get it out and dry it, then we got L-nonlinear crystal. |