Growth and characterization of Fe3+-doped bis(thiourea)zinc(II) chloride crystals

Growth and characterization of Hexakis(thiourea)nickel(II) nitrate crystals

“…It is well proven fact by both theory and experiment that for having a SHG character, the material should have a noncentrosymmetric crystal structure. However, a very few reports are available in the literature which show that the centrosymmetric crystals [14,[25][26][27][28][29] or films [28] also exhibit NLO properties. Weak signals result from possible surface effects [30] or local noncentrosymmetry caused by defects [31].…”

“…Many metal thiourea complexes possessing second-order NLO activities [4][5][6][7][8][9][10] and some of them centrosymmetric in nature [11][12][13] have been reported. As a part our studies, in the growth of centrosymmetric crystals exhibiting a small SHG efficiency [14], in the present investigation, we are reporting the growth, structure and characterization of hexakis(thiourea)nickel(II) nitrate crystals.…”