Organic noncentrosymmetric complexes of 4-nitrophenol for second harmonic generation

The paper reports synthesis and co-crystallization of 5 co-crystal of 4-nitrophenol (4N) with five different mono-and diaminopyridines (4-aminopyridine (4AP); 3,4-diaminopyridine (34DAP); 2-amino-6-methylpyridine (26MAP); 2,6-diaminopyridine (26DAP); 2-aminopyridine (2AP)) resulted in five adducts with the molar ratio of components 2: 1 in final compounds. X-ray analysis confirms the non-centrosymmetric packing of obtained compounds. Two compounds crystallize in the polar acentric P2(1) and three compounds crystallize in acentric orthorhombic Pna2(1) space groups. The comparative studies on the laser induced multiple and single shot damage thresholds of named crystals were carried out using radiation of 1064 nm from Nd:YAG laser with pulse width 10 ns. Obtained results show good laser-induced single-shot and multiple-shot damage threshold values for all studied co-crystals and are found up to 3.64 GW/cm(2) and 1.77 GW/cm(2) respectively.