Raman and infrared spectral studies of [C(NH₂)₃]₂M^II(H₂O)₄(SO₄)₂, M^II = Mn, Cd and VO

Abstract

The Raman and FTIR spectra of three metal guanidinium sulfates, [C(NH 2 ) 3 ] 2 M II (H 2 O) 4 (SO 4 ) 2 , (M II = Mn, Cd and VO), are recorded. The observed spectral bands are assigned in terms of the fundamental modes of vibration of the guanidinium ions, sulfate groups and water molecules. The appearance of the sulfate tetrahedra's n 1 and n 2 modes in the IR spectra and the partial lifting of the n 4 mode in the Raman spectra indicate the distortion of the SO 4 2− tetrahedra in the structure, so that its symmetry is lowered from T d to C 1 . The geometry of the sulfate group in guanidinium vanadyl sulfate does not deviate much from that of the average sulfate group. The distortion of the SO 4 tetrahedra is stronger in GuCds than in GuMnS. The CN 3 group in the guanidinium ion is planar (D 3h point group) in GuCdS and GuMnS, whereas it is lowered in the vanadyl compound. Furthermore, the spectral analyses show the presence of weak hydrogen bonds in the structures.

Probing for missing links in the binary and ternary V(V)–citrate–(H2O2) systems: Synthetic efforts and in vitro insulin mimetic activity studies

“…The strong Raman band observed at 1010 cm À1 is assigned to guanidinium and more precisely to the symmetric stretching vibration of the CN 3 group, in agreement with previous reports [70,71]. The absence of the corresponding band in the infrared spectrum indicates that the CN 3 group is truly planar (point group D 3h ).…”

Growth and Characterization of Non-Linear Optical Single Crystal Guanidinium triscadmium Sulphate Octahydrate

“…The IR spectrum of GuCdS compound contains strong bands at 3451 and 3523 cm -1 which are assigned to ν 1 and ν 3 vibrational modes of water molecule. The vibrational band assignments of FTIR spectrum of grown crystal was found to be consistant with that of the values reported in the literature [11]. The experimental vibrational frequencies of GuCdS are presented in Table-…”

Guanidine sulfate-assisted synthesis of hexagonal WO3 nanoparticles with enhanced adsorption properties

“…1) is a compound that releases CO 2 gas, NH 4 + ions and SO 4 2− ions in hydrothermal reaction processes. 26,27 Theoretically, the gas produced can increase the surface area of nanomaterials during their growth processes and SO In this work, nanostructured h-WO 3 was successfully synthesized with the addition of C 2 H 12 N 6 O 4 S as a structure directing agent. Characterization shows that the prepared sample exhibits relatively high surface areas and abundant hydroxyl groups on the surface.…”