P. Dastidar et al., BINARY SALTS OF SUBSTITUTED PYRIDINES AND L-TARTARIC ACID AS NONLINEAR-OPTICAL ORGANIC MATERIALS - CRYSTAL-STRUCTURE OF L-TARTARIC ACID-4-DIMETHYLAMINOPYRIDINE (1 1) DIHYDRATE SALT/, Perkin transactions. 2, (12), 1993, pp. 2419-2422
A number of salts of substituted pyridines with L-tartaric acid were p
repared. Their nonlinear optical behaviour e.g. second harmonic genera
tion (SHG) activity was measured. The crystal structure of L-tartaric
acid-4-dimethylaminopyridine (1:1) dihydrate salt 1 was determined in
order to understand the relationship between crystal packing and SHG a
ctivity within salt 1.