Mixed-Ligand Complexation of Zinc and Cobalt(II) Complexonates with Amino Acids in an Aqueous Solution

Пырэу, Д. Ф.; Alekseeva, E. S.; Simagina, T. A.; Груздев, М. С.; Kumeev, R. S.; Gridchin, S. N.

doi:10.1134/s0036023618020183

Cited by 2 publications

(8 citation statements)

References 19 publications

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“…The mixed liquor was centrifuged. The purple product was totally washed by deionized water and moderate methanol for three times 25,26 . Afterward, the product was placed for 12 hours for drying at 50°C.…”

Section: Methodsmentioning

confidence: 99%

“…This was mainly because ZIF-67 had good rigid structure. 26,47 F I G U R E 5 (A) Water uptake, (B) swelling ratios, (C) proton conductivities, and (D) Arrhenius plots of hybrid membranes…”

Section: Mechanical Properties Of Membranesmentioning

confidence: 99%

“…In particular, the Co 2+ contained in ZIF-67 could coordinate well with the amino group ( NH 2 ) anchoring in polymer backbone, which was beneficial to improve the compactness of membrane and then enhanced the proton conductivities of membranes. 26,47 Compared to commercial Nafion117 (0.083 S cm À1 at 80 C), 24 C-SPAEKS/ HPW@MIL-100 (Fe) 4% (0.072 S cm À1 at 80 C), 1 CS/UiO-66(NH 2 )-15 (0.056 mS cm À1 at 80 C) 50 and H 2 SO 4 @MIL-101/CS (0.095 S cm À1 at 80 C), 51 the Am-S-D-AMPS/ZIF-67-10% showed the highest proton conductivity (Table 4). Temperature dependence of proton conductivity could be described through Arrhenius relationship 30 :…”

Section: Proton Conductivity Of Hybrid Membranesmentioning

confidence: 99%

“…These Co 2+ ions could coordinate with amino groups on organic matrix backbone. 26,47 And thus ZIF-67 fillers which act as proton carriers could be anchored stably to polymers backbone. Meanwhile, the long sulfonic acid side chain and the short sulfonic acid side chain located on the uneven molecular chain could effectively increase the content of "bulk water" and expand the proton transport way.…”

Section: Proton Conductivity Of Hybrid Membranesmentioning

confidence: 99%

“…These Co 2+ ions could coordinate with amino groups on organic matrix backbone. 26,47 And thus ZIF-67 fillers could be anchored stably to polymers backbone. The results indicated that the hybrid membranes had good long-term stability.…”

Section: Long-term Stability Of Hybrid Membranesmentioning

confidence: 99%

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Construction of effective transmission channels by anchoring metal‐organic framework on side‐chain sulfonated poly(arylene ether ketone sulfone) for fuel cells

Shi

et al. 2022

Intl J of Energy Research

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A series of novel organic-inorganic hybrid membranes assembled by side-chain type sulfonated poly(arylene ether ketone sulfone) with amino groups (Am-SPAEKS-DBS) and ZIF-67 were prepared. Am-SPAEKS-DBS containing double bonds was synthesized by condensation polymerization, and the AMPS was grafted onto the main chain by post sulfonation. ZIF-67 was prepared by an ordinary solvent method. The structures of ZIF-67, Am-SPAEKS-DBS, and hybrid membranes were analyzed by proton nuclear magnetic resonance ( 1 H NMR), scanning electron microscopy (SEM), powder X-ray diffraction (PXRD) and Fourier transform infrared (FT-IR). All hybrid membranes had good dimensional stability and excellent oxidation stability. In addition, the swelling ratios of all hybrid membranes were low (<17.46%) at even 100 C, and the oxidative stability was higher than 92%. The proton conductivities of this series of membranes were much higher (0.0540.069 S cm À1 at 30 C, 0.088-0.116 S cm À1 at 80 C) than pure membrane (0.038 S cm À1 at 30 C, 0.076 S cm À1 at 80 C).The experimental results exhibited that the comprehensive properties of hybrid membranes are good, and hybrid membranes had substantially possible as proton exchange membranes. Highlights• Metal-organic frameworks were anchored on side-chain type organic polymer backbone.• The hybrid PEMs showed good dimensional stability and excellent oxidation stability.• The imidazole as a ligand in ZIF-67 contributes a part of the dissociated protons. K E Y W O R D Sorganic-inorganic hybrid membranes, proton conductivities, side-chains, sulfonated poly(arylene ether ketone sulfone), ZIF-67 Mengchi Ju and Qingyuan Shi contributed equally to this work.

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Section: Methodsmentioning

confidence: 99%

“…This was mainly because ZIF-67 had good rigid structure. 26,47 F I G U R E 5 (A) Water uptake, (B) swelling ratios, (C) proton conductivities, and (D) Arrhenius plots of hybrid membranes…”

Section: Mechanical Properties Of Membranesmentioning

confidence: 99%