Multinuclear NMR study of Au(I), Pd(II) and Ag(I) pyrazole complexes to investigate the coordination mode

Cornago, Pilar; Claramunt, R. M.; Cano, Mercedes; Heras, J.V.; Gallego, María

doi:10.3998/ark.5550190.0006.904

Cited by 7 publications

(1 citation statement)

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“…These numbers are summarized for the most significant carbon atoms in Table 2. The carboxyl carbon (C-1) is found to be most sensitive to metal coordination 60,63,62 in both MOFs. While incorporated into 1, this signal gets shifted downfield by 5.7 and 6.3 ppm, which clearly corroborates the metal binding via the carboxyl group; however, for 2, the effects are somewhat smaller.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

Synthesis, Crystal Structure, and Solid-State NMR Investigations of Heteronuclear Zn/Co Coordination Networks — A Comparative Study

et al. 2013

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Section: ■ Experimental Sectionmentioning

confidence: 99%

Synthesis, Crystal Structure, and Solid-State NMR Investigations of Heteronuclear Zn/Co Coordination Networks — A Comparative Study

et al. 2013

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Novel Composite Plastics Containing Silver(I) Acylpyrazolonato Additives Display Potent Antimicrobial Activity by Contact

Marchetti

Palmucci

Pettinari

et al. 2014

Chemistry A European J

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New silver(I) acylpyrazolonato derivatives displaying a mononuclear, polynuclear, or ionic nature, as a function of the ancillary azole ligands used in the synthesis, have been fully characterized by thermal analysis, solution NMR spectroscopy, solid-state IR and NMR spectroscopies, and X-ray diffraction techniques. These derivatives have been embedded in polyethylene (PE) matrix, and the antimicrobial activity of the composite materials has been tested against three bacterial strains (E. coli, P. aeruginosa, and S. aureus): Most of the composites show antimicrobial action comparable to PE embedded with AgNO3 . Tests by contact and release tests for specific migration of silver from PE composites clearly indicate that, at least in the case of the PE, for composites containing polynuclear silver(I) additives, the antimicrobial action is exerted by contact, without release of silver ions. Moreover, PE composites can be re-used several times, displaying the same antimicrobial activity. Membrane permeabilization studies and induced reactive oxygen species (ROS) generation tests confirm the disorganization of bacterial cell membranes. The cytotoxic effect, evaluated in CD34(+) cells by MTT (3-(4,5-dimethylthiazole-2-yl)-2,5-diphenyltetrazoliumbromide) and CFU (colony forming units) assays, indicates that the PE composites do not induce cytotoxicity in human cells. Studies of ecotoxicity, based on the test of Daphnia magna, confirm tolerability of the PE composites by higher organisms and exclude the release of Ag(+) ions in sufficient amounts to affect water environment.

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Cationic Silver Coordination Compounds of Polydentate Ligands: Supramolecular Structures of [Ag(Pz^bp2Py)₂(OSO₂CF₃)] and [Ag₂(Pz^bp2Py)₂(OSO₂CF₃)₂] {Pz^bp2Py = 2‐[3,5‐Bis(4‐butoxyphenyl)pyrazol‐1‐yl]pyridine}

et al. 2005

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Multinuclear NMR study of Au(I), Pd(II) and Ag(I) pyrazole complexes to investigate the coordination mode

Abstract: The coordination effects induced on the 1 H-, CPMAS NMR proved to be the most useful tool for establishing the coordination site. The increase in the nitrogen-shielding on metal-complexation owing to changes in the paramagnetic shielding term is about -55 ppm.

Cited by 7 publications

References 8 publications

Synthesis, Crystal Structure, and Solid-State NMR Investigations of Heteronuclear Zn/Co Coordination Networks — A Comparative Study

Synthesis, Crystal Structure, and Solid-State NMR Investigations of Heteronuclear Zn/Co Coordination Networks — A Comparative Study

Novel Composite Plastics Containing Silver(I) Acylpyrazolonato Additives Display Potent Antimicrobial Activity by Contact

Cationic Silver Coordination Compounds of Polydentate Ligands: Supramolecular Structures of [Ag(Pz^bp2Py)₂(OSO₂CF₃)] and [Ag₂(Pz^bp2Py)₂(OSO₂CF₃)₂] {Pz^bp2Py = 2‐[3,5‐Bis(4‐butoxyphenyl)pyrazol‐1‐yl]pyridine}

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Multinuclear NMR study of Au(I), Pd(II) and Ag(I) pyrazole complexes to investigate the coordination mode

Abstract: The coordination effects induced on the 1 H-, CPMAS NMR proved to be the most useful tool for establishing the coordination site. The increase in the nitrogen-shielding on metal-complexation owing to changes in the paramagnetic shielding term is about -55 ppm.

Cited by 7 publications

References 8 publications

Synthesis, Crystal Structure, and Solid-State NMR Investigations of Heteronuclear Zn/Co Coordination Networks — A Comparative Study

Synthesis, Crystal Structure, and Solid-State NMR Investigations of Heteronuclear Zn/Co Coordination Networks — A Comparative Study

Novel Composite Plastics Containing Silver(I) Acylpyrazolonato Additives Display Potent Antimicrobial Activity by Contact

Cationic Silver Coordination Compounds of Polydentate Ligands: Supramolecular Structures of [Ag(Pzbp2Py)2(OSO2CF3)] and [Ag2(Pzbp2Py)2(OSO2CF3)2] {Pzbp2Py = 2‐[3,5‐Bis(4‐butoxyphenyl)pyrazol‐1‐yl]pyridine}

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Cationic Silver Coordination Compounds of Polydentate Ligands: Supramolecular Structures of [Ag(Pz^bp2Py)₂(OSO₂CF₃)] and [Ag₂(Pz^bp2Py)₂(OSO₂CF₃)₂] {Pz^bp2Py = 2‐[3,5‐Bis(4‐butoxyphenyl)pyrazol‐1‐yl]pyridine}