Complex formation of Sn(II) with glycine: An IR, DTA/TGA and DFT investigation

Abstract

The novel Sn(Gly)2⋅H2O complex compound has been synthesized and characterized by TGA, IR and Raman spectroscopy. Molecular spectroscopy and ab initio simulation have given the evidence of glycine molecule being coordinated to Sn(II) as bidentate chelating ligand by oxygen atom of carboxyl group and nitrogen atom of amino group. Water molecule is bonded with amino and carboxylic groups by hydrogen bonds in the out sphere. The M06, TPSS, TPSSm, TPSSh and revTPSS density functionals have been tested for calculation of structural and vibrational data. The vibrational assignment of experimental IR and Raman and simulated spectra has been carried out. The TPSS and TPSSm density functionals and Def2-TZVP basis set have provided the most accurate results.

Understanding H2 Evolution Electrochemistry to Minimize Solvated Water Impact on Zinc‐Anode Performance

“…[ 44 ] The coordination between Zn 2+ and COO − was confirmed via FT‐IR measurement, in which an upward shift was observed for the characteristic band for COO − , Figure 3c. [ 41 ] 1 H nuclear magnetic resonance (NMR) on different solutions confirmed that the H originated from the –CH 2 – of the glycine with a characteristic peak located at ≈3.4 ppm, that shifts to ≈3.27 and ≈3.12 ppm for, respectively, 1 M ZnSO 4 –3 M glycine and 1 M ZnSO 4 –1 M glycine (Figure S6, Supporting Information). The negative shift evidence decreased electron density because of an inductive effect caused by the interaction between Zn 2+ and carboxy/amino group.…”

“…This glycine additive possesses one carboxy and one amino, group, and reportedly has a stronger coordination ability with the metal ions than with the water molecules. [ 41,42 ] Characterization techniques, including, Raman, FT‐IR, and NMR were used to determine solvation structure evolution in the ZnSO 4 ‐glycine electrolyte. The Raman spectra, Figure a, show that the characteristic C‐N stretching vibration band located at 1035 cm −1 in pure glycine solution shifts to a higher wavenumber on the addition of ZnSO 4 salt to the electrolyte, evidencing strong interaction between Zn 2+ and N atoms in the additive.…”

Preparation of rigid polyurethane foams catalyzed by metal-glycine and metal-alanine complexes

“…Novikova et al[17] synthesized tin-glycine complex [Sn(Gly)2•H 2 O] and characterized by TGA, IR and Raman spectroscopy. It was found that glycine molecule is coordinated to Sn(II) as bidentate chelating ligand by oxygen atom from the carboxyl group and nitrogen atom of a glycine molecule (Figure 2.7).…”