Acid–base behavior and Al3+ complex formation of synthesized 2,3-dihydroxyterephthalic acid (DHTPA) at pH 3 as a model compound of Inogashira fulvic acid (IFA)

Kurisaki, Tsutomu; Etou, Mayumi; Okaue, Yoshihiro; Wakita, Hisanobu; Yokoyama, T.

doi:10.1016/j.poly.2014.02.006

Cited by 5 publications

(1 citation statement)

References 16 publications

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“…It is noted that metallic Ag 3d of Ag peaks are centered at 373.9 and 367.9 eV , but the Ag 3d of Ag + ions are centered at 375.8 and 369.6 eV , hence the Ag 3d spectra of Ag–rGO reveals the formation of mixed metallic Ag and Ag + on rGO. The residue functional groups, such as carboxyl group, on rGO and Ag + ions on Ag NPs may provide a monodentate complex , enabling the formation of covalent bonds between the rGO and Ag NPs, which can rationalize the strongly bonded Ag NPs on rGO. Therefore, all the characterizations results indicate that Ag–rGO hybrids, which consist of evenly covered Ag NPs covalently attached on rGO, are successfully synthesized.…”

Section: Resultsmentioning

confidence: 99%

Enhancement of the thermal conductivity of polymer composites with Ag-graphene hybrids as fillers

Wang

Zhang

et al. 2014

Phys. Status Solidi A

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Poly(vinyl alcohol) (PVA) composites with incorporation of Ag nanoparticle–reduced graphene oxide (Ag–rGO) hybrids as fillers were prepared and the thermal conductivity of the resulting Ag–rGO/PVA composites was investigated. Ag–rGO hybrids were fabricated by a chemical reduction method, and their morphology, crystal, and chemistry were characterized. Benefiting from the unique characteristic of Ag–rGO hybrids, the Ag–rGO/PVA composites showed a 153% increase in thermal conductivity with addition of 1.0 vol% Ag–rGO, which was much superior to the composites with bare rGO. The significant thermal conductivity enhancement was probably attributed to the combined factors of homogeneous filler dispersion, enhanced interfacial interaction, and “bridge” effect of Ag NPs for establishing thermally conductive networks. Therefore, our study shows that the Ag–rGO hybrids have the potential to be successfully used as the nanofillers of polymer composites for thermal management applications.

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Section: Resultsmentioning

confidence: 99%

Enhancement of the thermal conductivity of polymer composites with Ag-graphene hybrids as fillers

Wang

Zhang

et al. 2014

Phys. Status Solidi A

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Complexation Between Aluminum Ion and Glycolic Acid Under Acidic Condition

et al. 2023

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The complexation between Al 3+ ([Al(H 2 O) 6 ] 3+ ) and glycolic acid (GA, C 2 H 4 O 3 ) which has a carboxyl group and a hydroxyl group in a molecule was investigated under acidic condition using 27 Al NMR, 13 C NMR and ESI-MS techniques. The ve peaks including a peak due to Al 3+ were observed in 27 Al NMR spectra for the mixed solution of Al 3+ and GA, suggesting the existence of at least four Al-GA complexes. The results of NMR and ESI-MS measurements revealed that GA and Al 3+ can form one monodentate complex (AlGA 2+ ) and three bidentate complexes (AlGA + , AlGA 2 − , and AlGA 3 3− ) complexes. From the deconvolution of 27 Al NMR spectra and pKa value of GA, the conditional formation constants (log K) of each complex (GA/Al molar ratio of 25 in mixed solution) can be determined to be 0.94 (AlGA 2+ ), -0.96 (AlGA + ), -0.77 (AlGA 2 -) and − 2.21 (AlGA 3 3-), respectively. In addition, the overall formation constant of three bidentate complex at pH 3 was also calculated to be -1.65.

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Gallic acid complexation with Al3+ under acidic condition – 27Al NMR and DFT study –

Etou,

Yoshida,

Tsuji

et al. 2024

Inorganica Chimica Acta

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Acid–base behavior and Al3+ complex formation of synthesized 2,3-dihydroxyterephthalic acid (DHTPA) at pH 3 as a model compound of Inogashira fulvic acid (IFA)

Cited by 5 publications

References 16 publications

Enhancement of the thermal conductivity of polymer composites with Ag-graphene hybrids as fillers

Enhancement of the thermal conductivity of polymer composites with Ag-graphene hybrids as fillers

Complexation Between Aluminum Ion and Glycolic Acid Under Acidic Condition

Gallic acid complexation with Al3+ under acidic condition – 27Al NMR and DFT study –

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