Cobalt(II) Complexes of Creatinine
TL;DR: In this paper, the electronic spectra and magnetic moments suggest a d7 configuration for cobalt: a tetrahedral geometry (4.4 B.M.) for halide and thiocyanate complexes, and an octahedral geometry for the carboxylate complexes.
Abstract: Cobalt(II) complexes of creatinine [Co(creat)2X2] (X = Cl, Br, I or NCS) and [Co(creat)2X2(H2O)2] (X = HCO2, HOCH2CO2 or CNCH2CO2) have been prepared. Their i.r. spectra show an increase in ν(NH) of the cyclic secondary amine group, compared to free ligand (3300 cm−1), indicating that cyclic nitrogen is involved in coordination. The thiocyanate group coordinates through nitrogen and carboxylates coordinate as univalent unidentate ligands. The electronic spectra and magnetic moments suggest a d7 configuration for cobalt: a tetrahedral geometry (4.4 B.M.) for halide and thiocyanate complexes, and an octahedral geometry (5.0 B.M.) for the carboxylate complexes. On heating, the ligand moiety is lost and the respective cobalt halide or cobalt carboxylate is formed, which is converted finally into Co3O4. There is a correlation between the high intensity electronic transitions and the polarographic half-wave potentials.
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TL;DR: In this paper, single crystals of glycine and creatinine doped glycine (GLC) were crystallized using slow evaporation solution growth technique and structural analysis of the grown crystals has been carried out using single crystal XRD.
Abstract: Single crystals of glycine (GL) and creatinine doped glycine (GLC) crystals were crystallized using slow evaporation solution growth technique. Structural analysis of the grown crystals has been carried out using single crystal XRD. The polymorphic forms and lattice parameters of glycine crystals were confirmed. The identification of functional groups and the intensity variation, peak shifting caused by creatinine in glycine crystals were recognized by Raman spectroscopic analysis. Good optical quality and the optical parameters such as optical band gap, cut-off wavelength, transmittance were inferred from UV–Visible spectroscopy. Second Harmonic Generation (SHG) shows significant enhancement in the efficiency of GLC crystal. GLC exhibited improved piezoelectric coefficient d33 of 8 pC/N which was higher compared with other glycine crystals. The incorporation of creatinine increases the mechanical strength and laser stability (41.93 GW/cm2) of GLC crystals. In doped glycine crystal, dielectric constant increases with decrease in dielectric loss. All enhanced physical properties of GLC crystal were investigated which proposes the suitability of GLC crystal towards Optoelectronic applications.
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TL;DR: In this article , the analysis of FT-IR and Raman spectra helps to understand the coordination properties of the creatinine ligand and to determine the probable structure of the complexes.
Abstract: ABSTRACT. Zinc(II), cadmium(II), tin(II), lead(II) and antimony(III) complexes of creatinine with the composition of [M(creat)2Xn].xH2O, (X = Cl or NO3; n = 2-6) were prepared. The complexes were characterized by analytical and spectral methods. The analysis of FT-IR and Raman spectra helps to understand the coordination properties of the creatinine ligand and to determine the probable structure of the complexes. The shift in the resonances of cyclic NH proton in the 1H NMR when compared to the ligand indicated that cyclic nitrogen coordinates. Conductivity measurements in DMSO suggested that the complexes are non-electrolytes. Thermal decomposition behavior of the complexes was also discussed.
KEY WORDS: Creatinine, TGA/DTA, Metal complexation, Raman spectroscopy
Bull. Chem. Soc. Ethiop. 2022, 36(4), 831-842.
DOI: https://dx.doi.org/10.4314/bcse.v36i4.9
Dissertation•
15 Feb 2016
TL;DR: Given the fact that creatine can be synthesized from the above-mentioned amino acids, protein sources rich in these amino acids can be expected to provide adequate capability of native biosynthesis in the human body.
Abstract: Creatinine (C4H7N3O), a nitrogeneous organic compound, is found in muscle tissue and blood. It is normally excreted in the urine as a metabolic waste. Urinary excretion of creatinine is relatively constant from day to day, and reflects mainly the amount of muscle tissue in the body. Therefore the amounts of various components of urine are often expressed relative to creatinine. It is mainly filtered by the kidney, though a small amount is actively secreted. There is little-to-no tubular re-absorption of creatinine. If the filtering of the kidney is deficient, creatinine levels rise. As a result, creatinine blood levels may be used to calculate Creatinine Clearance (CCr), which reflects the Glomerular Filtration Rate (GFR). The GFR is clinically important because it is a measurement of renal function. Measurement of creatinine levels in serum and determination of renal clearance of creatinine are widely used for laboratory diagnosis of renal and muscular function. Creatine is naturally produced in the human body from amino acids primarily in the kidney and liver. It is transported in the blood for use by muscles. Approximately 95% of the human body's total creatine is located in skeletal muscle. Creatine is not an essential nutrient, as it is produced in the human body from L-arginine, glycine, and L-methionine. In humans and animals, approximately half of stored creatine originates from food. A study, involving 18 vegetarians and 24 non-vegetarians, on the effect of creatine in vegetarians showed that total creatine was significantly lower than in non-vegetarians. Since vegetables are not the primary source of creatine, vegetarians can be expected to show lower levels of directly derived muscle creatine. Given the fact that creatine can be synthesized from the above-mentioned amino acids, protein sources rich in these amino acids can be expected to provide adequate capability of native biosynthesis in the human body. The structure of thesis contains investigation on "Structural Investigations on Some Creatinine and Creatine Complexes". The present research work consists of six chapters.
Cites background from "Cobalt(II) Complexes of Creatinine"
...The complexation ability towards a number of metal ions with Ag(I), Hg(II), Cd(II), Zn(II), Co(II), Ni(II), Cu(II), Pt(II) and Pd(II) was already studied [Canty et al (1978), Udupa & Krebs (1979), Muralidharan et al (1984), Okabe et al (1995) and Celal Bayrak et al (2010)]....
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