1. Study On The Crystallization Kinetics Of L-α-amino-acid Zinc Complexes 2. Theory Calculation On The Charge-transfer Excited States Of Emission Materials

Based on the Burton-Cabrera-Frank (BCF) dislocation theory model, we have calculated the kinetic equation of the crystal growth process in the microclarimeter. The optimum volume ratio of Zn (AA) SO4 nH2O [AA = L- a -Threonine, L- a -Leucine, L-a -Phenylalanine, L- ff-Valine, L- a -Methionine; n= 1,0.5, 1, 1, 1] crystallizing from mixed solvent of water with acetone are 1 :3 1 1:5, 1:9, 1:10 and 1 :30 of watenacetone, respectively. The heat produced and the rate of heat production during the crystal growth process of these compounds at 293. 15K, 295. 15K, 298. 15K and 300. 15K are investigated by microcalorimetry. With the experimental data, the rate constants of crystal growth, k1 and k2 the constants of BCF, a and b, and the thermokinetic parameters of the crystal growth process, are calculated. The results show that the crystal growth processes occurring in the microclarimeter are in accord with the Burton-Cabrera-Frank dislocation theory.