Sugar-metal ion interactions: The coordination behavior of cesium ion with lactose, d-arabinose and l-arabinose

Jiang, Ye; Xue, Jinzhuang; Wen, Xiaodong; Zhai, Yuanzheng; Yang, Limin; Xu, Yizhuang; Zhao, Guozhong; Kou, Kuan; Liu, Kexin; Chen, Jiaer; Wu, Jinguang

doi:10.1016/j.molstruc.2016.01.005

Cited by 14 publications

(6 citation statements)

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“…Although it is not possible to detect the presence of zinc in samples diluted up to 10 À3 as observed by the AAS technique, the triturated samples at high dilution still maintain the same thermogravimetric profile of low triturated samples. This hypothesis has already been suggested by Davenas et al 41 and also by other researchers in liquid systems, 39,40,42 in which water would be responsible for the changes in their physicochemical properties. 33,41,43,44 These different models suggest NPs formation, as well as NBs generation, due to the mechanical energy promoted by dynamization.…”

Section: Discussionsupporting

confidence: 54%

Physicochemical Properties of Zinc and Lactose in Solid Mixtures: Influence of Trituration Process

et al. 2021

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Background Recent experimental results supporting the dynamization process show modification in the characteristics of solid mixtures. Objective The present work aims to evaluate the physicochemical properties of metallic zinc and lactose, evidencing the interactions between all chemical components presented in dynamized solid mixtures by analytical techniques. Methods Mixtures of zinc and lactose (1:9 w/w) were successively triturated at the same proportion according to the Brazilian Homeopathic Pharmacopoeia, receiving the designation of 10−1 – 10−6 (1dH – 6dH). All samples were submitted to the following characterization techniques: Atomic Absorption Spectrometry (AAS), Scanning Electron Microscopy (SEM), X-ray Diffraction (XRD), Differential Scanning Calorimetry (DSC), Thermogravimetry (TG), and Raman Spectroscopy (RS). Results AAS results detected 97.0% of zinc in the raw material, and the triturated zinc lactose system (ZnMet) presented mean values similar to those expected for the physical mixtures: i.e., 9.94%, 1.23%, and 0.11% in the three first proportions (10−1, 10−2, 10−3), respectively. SEM images showed particle size reduction due to the trituration process. The XRD assays of ZnMet 10−3 and 10−6 indicated peak changes at 12.3° and 43.26°, probably associated with modifications of inter-atomic crystalline spacing. The thermal analysis results of dynamized samples suggest modifications in the chemical interaction between zinc and lactose induced by the physical forces applied. RS experiments showed variation in vibration frequencies due to the dynamization procedure, in which marked ZnMet 10−6 spectral modifications were detected at 357, 477, 1086 and 1142 cm−1, and in the wavelength range 860–920 cm−1. Conclusion These results highlight the importance of applying suitable characterization methods to improve our understanding of the properties of homeopathic solid mixtures, whereas the uses of sensitive tools evidence the influence of trituration on the crystalline properties and in the enthalpy variation of dynamized samples.

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Section: Discussionsupporting

confidence: 54%

Physicochemical Properties of Zinc and Lactose in Solid Mixtures: Influence of Trituration Process

et al. 2021

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“…The vibrational stretching of the hydroxyl groups were assigned in the region of 3214 cm -1 in the spectra of complex-1, 2 and 3 which corroborates with the formation of hydrogen bonding [12][13][14]. In complex-4, a narrow weak to medium band at 3521 cm -1 is also related to hydrogen bonding within the crystal lattice of this compound.…”

Section: Infrared Spectroscopysupporting

confidence: 60%

“…In complex-4, a narrow weak to medium band at 3521 cm -1 is also related to hydrogen bonding within the crystal lattice of this compound. Cesium(I) derivatives of lactose, d-arabinose and l-arabinose also showed hydrogen bonding at 3520 cm -1 confirmed by the X-ray structural determination [14]. At the low-frequency, novel bands in the region 530 cm -1 were assigned to the wagging vibrational band of coordinated water in complex-1, 2 and 3; complex-4 did not show bands correlated to this vibrational mode [12,13,15,16].…”

Section: Infrared Spectroscopymentioning

confidence: 81%

Synthesis, Characterisation and Antimicrobial Activity of Dimeric and Monomeric Copper(II)-Schiff base Complexes

Santos¹,

Oliveira²,

Maia³

2017

IOSR JAC

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“…16,17 More details and additional reports including complex formation between carbohydrates and transition metal or lanthanide ions may be found elsewhere. 11,[18][19][20][21][22][23][24][25][26][27][28][29][30] In this context, we disclose here for the first time a study to evaluate the coordination between a putative transition state analog of the glycoside hydrolysis and metal complexes. The assemblies are characterized by spectrophotometric titrations, isothermal titration calorimetry, CD spectroscopy and DFT methods.…”

Section: Introductionmentioning

confidence: 99%

Discrimination of chiral copper(ii) complexes upon binding of galactonoamidine ligands

Striegler

Pickens

2016

Dalton Trans.

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The coordination between N-p-methylbenzyl-d-galactonoamidine, a putative transition state analogue of the hydrolyis of glycosidic bonds, and symmetric and chiral binuclear copper(ii) complexes was characterized by spectroscopic titration, isothermal titration calorimetry, circular dichroism spectroscopy, and DFT calculations to elucidate the binding sites in the carbohydrate upon coordination to selected metal complexes. For the formation of metal complex-glyconoamidine assemblies, contributions of the amidine site and of the hydroxyl group at C-2 in the glycon of the amidine are noted. The chiral complexes S- and R-Cubpdbo are discriminated by a third binding site in the carbohydrate that leads to higher stability of complexes derived from S-Cubpdbo (4-5 kcal mol) compared to those formed from R-Cubpdbo.

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Sugar-metal ion interactions: The coordination behavior of cesium ion with lactose, d-arabinose and l-arabinose

Cited by 14 publications

References 50 publications

Physicochemical Properties of Zinc and Lactose in Solid Mixtures: Influence of Trituration Process

Physicochemical Properties of Zinc and Lactose in Solid Mixtures: Influence of Trituration Process

Synthesis, Characterisation and Antimicrobial Activity of Dimeric and Monomeric Copper(II)-Schiff base Complexes

Discrimination of chiral copper(ii) complexes upon binding of galactonoamidine ligands

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