No abstract

Impact of shock waves on non-linear optical materials bring about a lot of unknown behaviors of materials and such kinds of shock wave recovery experiments are highly required for the better understanding of material-property relationship. In the present context, we have performed experiments on the impact of structural properties of ammonium dihydrogen phosphate (ADP) samples under shock wave loaded conditions and the results of the test samples have been evaluated by X-ray diffraction (XRD), Raman spectroscopy, diffused reflectance spectroscopy (DRS) and field emission scanning electron microscopic (FESEM) technique. Interestingly, prismatic face of ADP shows loss of degree of crystallinity whereas pyramidal face shows enhancement of crystalline nature with respect to number of shock pulses due to shock wave induced dynamic re-crystallization. Hence, the present problem is worthy enough to unearth and understand the anisotropic nature of the ADP crystal and their structural modifications at shock wave loaded conditions.

The title salt, [Cu(C14H10N4)2(H2O)](CF3SO3)2, contains a Cu2+cation coordinated by two bidentate 3,6-bis(pyridin-2-yl)pyridazine ligands and one water molecule. The charge is balanced by two disordered trifluoromethanesulfonate anions. The asymmetric unit contains half of a cation (point group symmetry 2) and one anion. The coordinating water molecule is engaged in intermolecular O—H...O hydrogen bonds, which connect the cation to the anion. C—H...X(X= N, O, F) interactions stabilize the crystal structure.

We reported the bulk size with a dimension of 18×5×5 mm3 single-crystals of 18C6(Ba)(SCN)2.H2O [18-crown-6-ether barium(II) bisthiocyanate monohydrate]; abbreviated as BCBT, have been grown from an aqueous solution via slow evaporation solvent technique(SEST). The grown pristine single-crystals have characterized by single crystal X-ray diffraction (XRD), FT-IR, micro-Raman, and UV-Vis-NIR spectral studies. BCBT crystallizes in a monoclinic with a non-centrosymeetric space group of P21 crystal system. Additionally, the chemical etching studies showed that the reverse crystal growth rates of BCBT. The FT-IR studies confirmed the present of functional groups in the grown single-crystal of BCBT. Interestingly, the CN stretching observed at 2012 cm−1 is clearly shown the N-bonded nature of SCN with Ba2+. Moreover, the micro-Raman spectrum is used to further additional confirmation of BCBT single-crystal. In the entire visible region, the BCBT crystal has found to be wide (UV-Vis-IR) optically absorption from 231 to 800 nm, which is suitable for optoelectronic applications. The laser damage threshold measurements on the BCBT crystal with Q-switched Nd: YAG laser of fundamental wavelength 1064 nm (QUANTA RAY Model LAB – 170 - 10, pulse width 10 ns and repetition rate 6 Hz used as the source of light for laser damage threshold experiment. Moreover, the thermal stability of grown BCBT is stable up to 289 °C. From the results reveal that the sample possess admirable thermal stability compared to other IOPS series such as CLTC (171°C), and ACCTC (241°C).

The title compound, (NH4)2[Zn(NCS)4]·2C12H24O6·H2O, the result of the reaction of ammonium thio­cyanate, 18-crown-6 and zinc(II) chloride in aqueous solution, exhibits an unusual supra­molecular structure. The Zn atom, two of the thio­cyanate chains and a water mol­ecule, disordered over two positions, lie on a mirror plane. The macrocycle adopts a conformation with approximate D 3d symmetry. The ammonium mol­ecules are contained within the bowl of the macrocycle via extensive N—H⋯O hydrogen bonds and the complex mol­ecules are linked via N—H⋯S hydrogen bonds, forming chains along the c-axis direction. The macrocycle is disordered over two positions [refined occupancy ratio = 0.666 (8):0.334 (8)]. The S atoms of two iso­thio­cyanate ligands are disordered within and about the mirror plane.