Interactions between metal ions and carbohydrates. The coordination behavior of neutral erythritol to lanthanum and erbium ions

Yang, Limin; Xu, Yizhuang; Wang, Yalei; Zhang, Shiwei; Weng, Shifu; Wu, Jinguang

doi:10.1016/j.carres.2005.10.008

Cited by 22 publications

(24 citation statements)

References 22 publications

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“…The metal−saccharides or metal−alditol complexes prepared in an alkaline environment are not included in this survey. From the survey, we found four complexes where the deprotonation phenomenon was present (three complexes described in the present paper and a complex reported in our previous work 14 ). A brief description of the structure of the complex reported in our previous paper can also be found in Part 11 of the Supporting Information.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…All lanthanide chlorides, erbium nitrate, erythritol (C 4 H 10 O 4 ), and solvents for the experiments are AR reagents and used as supplied from commercial sources. The crystals were prepared using the method mentioned in our previous papers. − A brief description is as follows: A series of aqueous/ethanol solutions containing 3 mmol of erythritol and 3 or 6 mmol of heavy lanthanide salts were heated in a boiling water bath. During the heating process, ethanol was added to the solutions from time to time.…”

Section: Methodsmentioning

confidence: 99%

“…In our previous work, we have synthesized a series of metal complexes of saccharides or alditols. − Both saccharides and alditols are organic ligands with multiple hydroxyl groups (denoted as OLMHs). In most complexes we investigated, hydroxyl groups play a dual role: (1) hydroxyl groups act as ligands to coordinate with metal ions; (2) hydroxyl groups take part in the formation of the hydrogen bonding network in the crystal lattice of the complexes.…”

Section: Introductionmentioning

confidence: 99%

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Unexpected Deprotonation from a Chemically Inert OH Group Promoted by Metal Ions in Lanthanide–Erythritol Complexes

et al. 2021

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Single-crystal structures of five lanthanide–erythritol complexes are reported. The analysis of the chemical compositions and scrutinization of structural features in the single-crystal data of the complexes led us to find that unexpected deprotonation occurs on the OH group of erythritol of three complexes. Considering these complexes were prepared in acidic environments, where spontaneous ionization on an OH group is suppressed, we suggest metal ions play an important role in promoting the proton transfer. To find out why the chemically inert OH is activated, the single-crystal structures of 63 rare-earth complexes containing organic ligands with multiple hydroxyl groups (OLMHs) were surveyed. The formation of μ2-bridges turns out to be directly relevant to the occurrence of deprotonation. When an OH group from an OLMH molecule participates in the formation of a μ2-bridge, the polarization ability of the metal ions becomes strong enough to promote the deprotonation on the OH group. The above structural characteristics may be useful in the rational design of catalysts that can activate the chemically inert OH group and promote the relevant chemical conversions.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Unexpected Deprotonation from a Chemically Inert OH Group Promoted by Metal Ions in Lanthanide–Erythritol Complexes

et al. 2021

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“…Therefore, erythritol becomes C 4 H 9 O 4 . 43 Here, the fifth structure (TbE(I)) has been obtained. For such a simple molecule, five topological structures can be observed, which indicate the complexity of the interactions between lanthanide ions and carbohydrates.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Interactions between Metal Ions and Carbohydrates. Spectroscopic Characterization and the Topology Coordination Behavior of Erythritol with Trivalent Lanthanide Ions

et al. 2011

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The coordination of carbohydrate to metal ions is important because it may be involved in many biochemical processes. The synthesis and characterization of several novel lanthanide-erythritol complexes (TbCl(3)·1.5C(4)H(10)O(4)·H(2)O (TbE(I)), Pr(NO(3))(3)·C(4)H(10)O(4)·2H(2)O (PrEN), Ce(NO(3))(3)·C(4)H(10)O(4)·2H(2)O (CeEN), Y(NO(3))(3)·C(4)H(10)O(4)·C(2)H(5)OH (YEN), Gd(NO(3))(3)·C(4)H(10)O(4)·C(2)H(5)OH (GdEN)) and Tb(NO(3))(3)·C(4)H(10)O(4)·C(2)H(5)OH (TbEN) are reported. The structures of these complexes in the solid state have been determined by X-ray diffraction. Erythritol is used as two bidentate ligands or as three hydroxyl group donor in these complexes. FTIR spectra indicate that two kinds of structures, with water and without water involved in the coordination sphere, were observed for lanthanide nitrate-erythritol complexes. FIR and THz spectra show the formation of metal ion-erythritol complexes. Luminescence spectra of Tb-erythritol complexes have the characteristics of the Tb ion.

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“…The investigation on the interactions between metal ions and simple sugars can improve the understanding of metal ion interactions with sugar residues of biologically important compounds. This needs to assign the binding hydroxyl or other groups, and also to characterize the metal ion coordination of carbohydrates monitoring the ligand conformation and configuration changes forced by the complexation processes [8].…”

Section: Introductionmentioning

confidence: 99%

Activity coefficients and conductivities of calcium nitrate in glucose/galactose–water mixtures at 298.15K

Zhuo

Liu²,

Wang

et al. 2007

Fluid Phase Equilibria

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Interactions between metal ions and carbohydrates. The coordination behavior of neutral erythritol to lanthanum and erbium ions

Cited by 22 publications

References 22 publications

Unexpected Deprotonation from a Chemically Inert OH Group Promoted by Metal Ions in Lanthanide–Erythritol Complexes

Unexpected Deprotonation from a Chemically Inert OH Group Promoted by Metal Ions in Lanthanide–Erythritol Complexes

Interactions between Metal Ions and Carbohydrates. Spectroscopic Characterization and the Topology Coordination Behavior of Erythritol with Trivalent Lanthanide Ions

Activity coefficients and conductivities of calcium nitrate in glucose/galactose–water mixtures at 298.15K

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