Macromolecule–metal complexes: ligand field stabilization and thermophysical property modification

Belfiore, Laurence A.; McCurdie, Mary Pat; Das, Pronab

doi:10.1016/s0032-3861(01)00459-1

Cited by 40 publications

(26 citation statements)

References 24 publications

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“…This usually implies the reaction of transition-metal complexes with the nitrogen centers, for instance like those of the pendant pyridil units exposed in the P4VP micropores. [9][10][11][12][13] Some of us have shown in the recent past that vibrational spectroscopy of adsorbed small probe molecules, that is, an experimental method which is extensively used for surface characterization of bulky and microporous solids, [14][15][16][17] is a very powerful tool also for the characterization of the Brønsted acidic properties of sulfonic polymers. In particular, this technique has been successfully employed for the investigation of Nafion membranes, which are of paramount importance for catalytic applications and in fuel cells technology.…”

Section: Introductionmentioning

confidence: 99%

Exploring the Chemistry of Electron-Accepting Molecules in the Cavities of the Basic Microporous P4VP Polymer by in situ FTIR Spectroscopy

et al. 2008

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A systematic in situ FTIR investigation of the interaction of several molecules characterized by a different electron accepting ability (or acidity) with the basic pyridine units contained in a commercial poly(4-vinylpyridine) system characterized by a high surface area is here reported, with the final goal to fully understand the role of basicity in the catalytic processes. This approach, for the first time applied to polymeric materials, has only some similarities with the method usually adopted in the investigation of catalytic acid sites hosted inside oxidic porous materials (such as zeolites), where the probes are molecules characterized by an increased basicity. The experimental results are confirmed by ab initio theoretical calculations conducted on the 4-methylpyridine, which is the simplest molecule resembling the pyridine moiety in the P4VP system.

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Section: Introductionmentioning

confidence: 99%

Exploring the Chemistry of Electron-Accepting Molecules in the Cavities of the Basic Microporous P4VP Polymer by in situ FTIR Spectroscopy

et al. 2008

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“…The addition of a pendant ligand moiety to a polymer backbone is an efficient way of functionalising macromolecular materials providing them with new properties [1][2][3][4][5][6][7] and the imidazole ligand (see Scheme 1) is no exception. The imidazole ligand is of particular interest due to its important role in many biological systems, especially as the side group in histidine which plays an essential role in the active motif of many enzymes [8].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and polymerisation of maleoyl-L-histidine monomers and addition of histidine to an ethylene-alt-maleic co-polymer

2012

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This work has investigated two routes of synthesising polymers containing L-histidine using maleimide chemistry; grafting of histidine onto an ethylenealt-maleic anhydride copolymer and AIBN (azobisisobutyronitrile) initiated radical polymerisation of the monomer maleoyl-L-histidine. The grafting technique and monomer synthesis are utilising the maleimide formation between the primary amine of histidine and maleic anhydride. The reactions are conveniently carried out in one step with good yields. The copolymers containing L-histidine were prepared by reacting L-histidine or Lhistidine methyl ester with poly(ethylene-alt maleic anhydride) in DMSO at 50°C for 8-16 h with 80% yields independent of the degree of substitution. The monomer maleoyl-L-histidine was synthesised by reacting histidine and maleic anhydride in acetic acid and the monomer was subsequently polymerised by AIBN radical initiation in DMSO at 80°C for 48 h to yield poly(N-histidyl maleimide). The resulting polymer had a different optical rotation ([α] D 20 0−11) than the monomer ([α] D 20 0+25), which is ascribed to the threo-diisotactic and/or threodisyndiotactic stereoregularity of the polymer.

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“…When organic polymers are used as adhesive coatings and exposed to the atmosphere, they have the disadvantage that most of them break down on heating in air and some of them can be infected by microorganisms such as bacteria and fungi 5. These problems can be solved by the addition of metal ions in the polymeric system,6 which changes the physicochemical as well as biological properties of the polymers 7. On the other hand, organic polymers containing donor groups such as NH 2 , COOH, OH and CO interact with transition metal ions to form coordination polymers, which are thermally stable and impart both high flexibility due to the presence of the organic moiety and thermal stability due to the presence of inorganic functions in the same polymeric backbone 8–10.…”

Section: Introductionmentioning

confidence: 99%

“…5 These problems can be solved by the addition of metal ions in the polymeric system, 6 which changes the physicochemical as well as biological properties of the polymers. 7 On the other hand, organic polymers containing donor groups such as -NH 2 , -COOH, -OH and -C=O interact with transition metal ions to form coordination polymers, which are thermally stable and impart both high flexibility due to the presence of the organic moiety and thermal stability due to the presence of inorganic functions in the same polymeric backbone. 8 -10 Owing to the association of these properties, coordination polymers are used in scientific and industrial applications as catalysts, 11 semiconductors 12 and heatresistant surface coatings 13 on satellites and space ships.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization and antimicrobial activity of transition metal chelated thiourea‐formaldehyde resin

Ahamad

Kumar

Nishat

2006

Polymer International

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A polymeric ligand (thiourea‐formaldehyde resin ‐ TUFR) bearing nitrogen and sulfur donor groups was synthesized by the polycondensation of thiourea and formaldehyde in acidic medium and its polychelates were prepared in alcoholic solution of metal ions such as Mn(II), Co(II), Ni(II), Cu(II) and Zn(II). The TUFR polymeric ligand and its TUFR‐M(II) polychelates were characterized with micro‐analytical analysis and spectral studies. The FTIR spectra of polychelates indicated that the metal ions were coordinated through the sulfur of the thionyl (CS) groups and formed a covalent bond with the nitrogen of the NH groups. Electronic spectra, electronic spin resonance (ESR) spectra and magnetic moments revealed that the polychelates of Mn(II), Co(II) and Ni(II) were octahedral; however, Cu(II) and Zn(II) polychelates were square‐planar and tetrahedral, respectively. The thermogravimetric analysis data indicated that the polychelates were more stable than the corresponding ligand. The antimicrobial activities of all the compounds against several bacteria and fungi were also investigated by using the agar well diffusion method. Copyright © 2006 Society of Chemical Industry

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Macromolecule–metal complexes: ligand field stabilization and thermophysical property modification

Cited by 40 publications

References 24 publications

Exploring the Chemistry of Electron-Accepting Molecules in the Cavities of the Basic Microporous P4VP Polymer by in situ FTIR Spectroscopy

Exploring the Chemistry of Electron-Accepting Molecules in the Cavities of the Basic Microporous P4VP Polymer by in situ FTIR Spectroscopy

Synthesis and polymerisation of maleoyl-L-histidine monomers and addition of histidine to an ethylene-alt-maleic co-polymer

Synthesis, characterization and antimicrobial activity of transition metal chelated thiourea‐formaldehyde resin

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