Two novel 2D cadmium compounds with noncentrosymmetric or symmetric network dependent on different pH values

Xue, C. C.; Li, M. X.; Shao, Min; Wang, Z. X.

doi:10.1134/s1070328416070058

Cited by 6 publications

(3 citation statements)

References 30 publications

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“…23 The starting framework models, containing all atoms in the asymmetric part of the unit cell except those corresponding to water in case of 3, were derived from interpretation of the electron density map computed with the set of refined phases with the highest combined figure of merit. For cadmium derivative, 1, its crystal structure was obtained by simulated annealing procedure implement in EXPO2014 23 and using the structure of the orthorhombic polymorph 24 as starting model. The initial structural models were refined by the Rietveld method, 25 using the GSAS package 26 and the EXPGUI graphic interface.…”

Section: Methodsmentioning

confidence: 99%

Synthesis and electrochemical properties of metal(ii)-carboxyethylphenylphosphinates

et al. 2021

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Section: Methodsmentioning

confidence: 99%

Synthesis and electrochemical properties of metal(ii)-carboxyethylphenylphosphinates

et al. 2021

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“…In the infrared spectra of 1 , 2 , and 3 (Figure S1), it can be clearly observed that the strong characteristic band of PO appears in the region of 1395–1014 cm –1 and the middle peaks of P–O appear in the region of 1050–850 cm –1 . − A strong peak of 1685 cm –1 in compound 1 indicated the presence of carboxylic acid group with proton. And multiple strong peak also appeared in the range of 1600–1500 cm –1 , indicating that only one carboxyl group is deprotonated.…”

Section: Resultsmentioning

confidence: 97%

Various Silver Phosphinate Inorganic Architectures in Three-Dimensional Frameworks with Argentophilic Interactions

et al. 2019

Crystal Growth & Design

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Three silver compounds with the formulas: [Ag2(HL1)] (1), [Ag10(L2)2(H2O)1.25] (2), and [Ag5(L3)]·1.5H2O (3) were obtained by self-assembly of silver nitrate with 4,4′-phosphinicobis-dibenzoic acid (H3L1), 4,4′-phosphinicobis-diisophthalic acid (H5L2), and 2,2′-phosphinicobis-diisophthalic acid (H5L3) under hydrothermal conditions. The structures of these compounds were confirmed by various characterization methods. Both 1 and 2 crystallize in P21/n space group and present three-dimensional (3D) frameworks, which contain a sliver phosphinate inorganic chain or sheet formed by Ag–Ag interactions. Meanwhile, compound 3 is in C2/c space group and also displays a 3D silver-organic architecture. The open-framework contains narrow channels along the c-axis with an opening of 0.26 nm × 0.32 nm. The intriguing feature of the structure is emergence of a 3D inorganic skeleton in 3, which struts the whole framework. The 3D inorganic skeleton is generated from a silver phosphinite chain connected by strong Ag–Ag interactions. At room temperature, the compounds exhibit blue photoluminescence.

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“…While in the IR spectrum of CoCEPPA, no peak near 1700 cm −1 for the –COOH group is observed, two strong peaks around 1500–1345 cm −1 are observed, which are characteristic of absorption of asymmetric and symmetric vibrations of coordinated carboxylate groups present in the case of CaCEPPA. Strong characteristic bands of P=O in the region from 1390 to 1000 cm −1 and of P–O around 1050–850 cm −1 are present [ 46 , 47 ]. An increase in the peak strength or slight broadening of the existing peaks in the region 1700–1000 cm −1 are characteristic bands for P=O and of P–O, together with the appearance of new peaks created in the range of 400–600 cm −1 is related to Me 2+ -O peaks.…”

Section: Resultsmentioning

confidence: 99%

Hybrid Coordination Networks for Removal of Pollutants from Wastewater

Marganovici

Maranescu²,

Visa³

et al. 2022

IJMS

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The adsorption properties of two coordination polymers, resulting from the reaction of divalent metal (Ca2+ or Co2+) salts with (2-carboxyethyl)(phenyl)phosphinic acid, are presented in this paper. The structural and textural characterization before and after adsorption experiments is presented. The adsorbent materials were prepared using the hydrothermal procedure. The compound Ca[O2P(CH2CH2COOH)(C6H5)]2 (CaCEPPA) has a layered topology, with the phenyl groups oriented into the interlayer space and crystallizes in the monoclinic system. Compound Co2[(O2P(CH2CH2COO)(C6H5)(H2O)]2·2H2O (CoCEPPA) has a 1D structure composed of zig-zag chains. The adsorption performances of CaCEPPA and CoCEPPA materials were tested in the removal of cadmium and lead from aqueous solutions. The optimum pH of ions adsorption was found to be five for both adsorbent materials. Pseudo-first and second-order kinetic models were used for fitting kinetic experimental data, and Langmuir and Freundlich isotherms were used for modeling the equilibrium experimental data. The pseudo-second-order kinetic model and Langmuir isotherm best described the adsorption of Cd and Pb ions onto the studied materials, judging from the results of the error function (correlation coefficient, sum of square error, chi-square test, and average relative error) analysis. The studied materials present a higher affinity for Cd ions compared with the adsorption capacity developed for the removal of Pb ions from aqueous solutions. CoCEPPA showed the highest adsorption performance in the removal process of metal ions from aqueous solutions compared with CaCEPPA (qm = 54.9 mg Cd2+/g of CoCEPPA, qm = 36.5 mg Cd2+/g of CaCEPPA).

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Two novel 2D cadmium compounds with noncentrosymmetric or symmetric network dependent on different pH values

Cited by 6 publications

References 30 publications

Synthesis and electrochemical properties of metal(ii)-carboxyethylphenylphosphinates

Synthesis and electrochemical properties of metal(ii)-carboxyethylphenylphosphinates

Various Silver Phosphinate Inorganic Architectures in Three-Dimensional Frameworks with Argentophilic Interactions

Hybrid Coordination Networks for Removal of Pollutants from Wastewater

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