Transition-metal coordination in polymer blends and model systems

Belfiore, Laurence A.; Pires, Alfredo T. N.; Wang, Yinghua; Graham, Hugh; Ueda, Eiji

doi:10.1021/ma00031a009

Cited by 62 publications

(61 citation statements)

References 4 publications

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“…Figure 1s hows the DRIFT spectrao ft he P4VP/Pd(OAc) 2 system (spectrum 2) compared to that of P4VP (spectrum 1). Similar shifts of the IR absorption bands typical of the pyridyl groups in P4VP were reportedf or several P4VP/metal complexes, [26][27][28][29][30][31][32] testifying the occurrence of as trong interaction between the pyridyl groups of the polymer and the hosted metal precursors. In particular,t he two bands at ñ = 1596 and 1414 cm À1 ,w hich are assigned to the 8a and 19 bv ibrational modeso fp yridyl functional group, [25] shiftedt oñ = 1640 and 1430 cm À1 ,r espectively (arrows in Figure 1).…”

Section: Systemsupporting

confidence: 79%

The Pyridyl Functional Groups Guide the Formation of Pd Nanoparticles Inside A Porous Poly(4‐Vinyl‐Pyridine)

et al. 2015

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The reactivity of palladium acetate inside a poly(4‐vinylpyridine‐co‐divinylbenzene) polymer is strongly influenced by the establishment of interaction between the Pd precursor and the pyridyl functional group in the polymer. Diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) and simultaneous X‐ray absorption near edge structure (XANES) and small angle X‐ray scattering (SAXS) techniques have been applied to monitor the reactivity of palladium acetate in the presence of H2 and CO as a function of temperature. H2 reduces palladium acetate to Pd nanoparticles and acetic acid. The pyridyl groups in the polymer play a vital role both in stabilizing the formed acetic acid, thus allowing its detection by means of DRIFTS, and the final Pd nanoparticles, which are extremely small and mono‐dispersed. On the contrary, CO does not reduce palladium acetate. Rather, it forms Pd2+ carbonyl adducts, which favor the detachment of the acetate ligands and their thermal degradation. These adducts are well observable by means of SAXS because they cause an important local change of the electronic density.

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Section: Systemsupporting

confidence: 79%

The Pyridyl Functional Groups Guide the Formation of Pd Nanoparticles Inside A Porous Poly(4‐Vinyl‐Pyridine)

et al. 2015

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“…Pyridine ligands in poly(4-vinylpyridine) and 4-vinylpyridine copolymers coordinate to zinc, copper, nickel, cobalt and ruthenium. 9,13,19 Alkene ligands in the main chain or side group of diene polymers coordinate to palladium(II). 20 -23 The imidazole ring in the histidine side group of poly(L-histidine) coordinates to divalent cobalt, nickel, copper and zinc.…”

Section: Divalent Transition Metals Like Cobalt (Dmentioning

confidence: 99%

Transition metal compatibilization of poly(vinylamine) and poly(ethylene imine)

Belfiore¹,

Indra²

2000

J. Polym. Sci. B Polym. Phys.

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“…Poly(4-vinylpyridine) (P4VPy), a proton-accepting polymer, is miscible with a large number of proton-donating polymers such as poly(p-vinylphenol) (PVPh) 7,8) , poly(acrylic acid) (PAA) 9) , poly(methacrylic acid) (PMAA) 9,10) , poly(monoalkyl itaconate)s [11][12][13][14][15] and poly[2-acrylamido-2-methylpropanesulfonic acid] 16,17) . Blends of P4VPy or pyridine-containing polymers and ionomers have also been studied [18][19][20][21][22][23] . In many cases, the interactions between the pyridine groups and the proton-donating polymers or ionomers are so strong that the two polymers form complexes by co-precipitating from their common solvent in which both polymers are initially soluble.…”

Section: Introductionmentioning

confidence: 99%

Spectroscopic studies of interactions in complexes of poly(1-vinylimidazole) with poly(styrenesulfonic acid) or the zinc salt of poly(styrenesulfonate)

Luo¹,

Goh²,

Lee³

et al. 1999

Macromol. Chem. Phys.

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SUMMARY: Poly(1-vinylimidazole) (PVI) forms complexes with poly(styrenesulfonic acid) and the zinc salt of poly(styrenesulfonate) (PSSA and PSSZn, respectively) in water/ethanol (2 : 1 v/v) solution, indicating the presence of strong interactions. Infrared spectroscopic measurements showed the existence of protonated imidazole groups in all the complexes. X-ray photoelectron spectroscopic studies showed the development of high-binding-energy N(1) 1s and N(3) 1s peaks, but the values of the binding energy shift of N(3) 1s are larger than those of N(1) 1s in all PVI/PSSA and PVI/PSSZn complexes, suggesting proton transfer from PSSA to imidazole N(3) atoms in the PVI/PSSA complexes, and coordination between Zn 2+ and the imidazole N(3) atoms in the PVI/PSSZn complexes. Based on the values of the binding energy shift of the interacting nitrogen atoms, the strength of the coordination interaction in PVI/PSSZn complexes is weaker than the ionic interactions in the PVI/PSSA complexes. The development of a new S 2p spin-orbit split doublet at a low-binding-energy region reveals the existence of interactions between Zn 2+ and the imidazole nitrogen atoms.

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Transition-metal coordination in polymer blends and model systems

Cited by 62 publications

References 4 publications

The Pyridyl Functional Groups Guide the Formation of Pd Nanoparticles Inside A Porous Poly(4‐Vinyl‐Pyridine)

The Pyridyl Functional Groups Guide the Formation of Pd Nanoparticles Inside A Porous Poly(4‐Vinyl‐Pyridine)

Transition metal compatibilization of poly(vinylamine) and poly(ethylene imine)

Spectroscopic studies of interactions in complexes of poly(1-vinylimidazole) with poly(styrenesulfonic acid) or the zinc salt of poly(styrenesulfonate)

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