Growth and characterization of semiorganic crystal: Thiosemicarbazide lead nitrate (TSLN)

Does thiosemicarbazide lead nitrate crystal exist?

“…Recently we have shown that some metal-thiosemicarbazide compounds are actually thiosemicarbazide [3]. In order to verify the claim of preparation of a thiosemicarbazide containing lead nitrate in the lead nitrate-thiosemicarbaide system, we reinvestigated the crystal growth of TSLN under the same conditions as reported by Shakila and Kalainathan [1]. The product crystal which separated from the crystal growth medium turned out to be pure thiosemicarbazide as confirmed by its IR spectrum and melting point.…”

“…It is to be noted that the same research group had earlier reported to have made crystals of a so called urea thiosemicarbazone monohydrate by reaction of urea with thiosemmicarbazide. This has already been proved to be the less soluble thiosemicarbazide [1]. Although it is not clear why thiosemicarbazide is reported under different names, it can be concluded that TSLN is a dubious crystal.…”

“…During the course of a literature survey we came across the title paper by Shakila and Kalainathan [1] reporting in the abstract "Single crystal XRD study revealed that materials crystallized with triclinic crystal structure and its belongs to centrosymmetric space group Cc and powder X-ray diffraction(XRD) is to confirm the crystalline nature of the crystal…", In view of a strange space group assignment in the triclinic crystal system this paper attracted our attention and was taken up for scrutiny for verification of the claim. A perusal of the paper reveals that the authors have grown crystals of a so called thiosemicarbazide lead nitrate, by the slow evaporation solution method.…”

Linear and Non Linear Optical Activities of Metal - Organic Cadmium Thiosemicarbazide Bromide Single Crystals

“…The UV-Vis spectrum obtained through UV-Vis study offers the information about the structure of the molecule, because the absorption of UltraViolet and Visble radiations involves the promotion of the electron in S and P orbitals from the ground state to higher energy states.[5&6]. Here it is highly worthy to mention that, the applicability of any material for NLO applications, it should / must posses higher transparent window in the visible region [9].Hence UV-Vis absorption spectral studies have been taken here to check the applicability of the captured CTSCB crystal. [Where, h is Planck's constant (6.626 10 -34 Js -1 ), C is velocity of light (3 10 8 ms -1 ) and λ is the wavelength of incident radiation in nm.]…”