Applied macroinorganics. IV. Effect of the crosslinking agent on protonation, and metal ions complexing abilities, of ion exchange resins with poly(amido–amine) structure

Pesavento, Maria; Soldi, Teresa; Ferruti, Paolo; Barbucci, Rolando; Benvenuti, Manuela

doi:10.1002/app.1983.070281105

Cited by 14 publications

(21 citation statements)

References 4 publications

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“…Leaving apart amphoteric PAAs carrying carboxyl groups as side substituents, only PAAs containing at least two unprotonated amine groups per repeating unit that neither belong to a cyclic monomer nor are separated by more than three atoms are capable of complex formation. Crosslinked PAAs retain ion‐complexing ability similar to those of the corresponding linear polymers 18‐20…”

Section: Introductionmentioning

confidence: 99%

Acid‐base properties of poly(amidoamine)s

Ranucci

Ferruti

Lattanzio

et al. 2009

J. Polym. Sci. A Polym. Chem.

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Polyamidoamines (PAAs) represent a family of degradable polymers carrying tert-amine groups in the polymer backbone, which behave as polyelectrolytes in aqueous solutions. Many relevant properties of PAAs, including the ability to interact with components of the biological environments, such as nucleic acids, proteins, and living cells, are strongly dependent on their acid-base properties, hence on their ionization state in different biological districts. In this article, the protonation constants of a series of PAAs have been precisely determined by electrochemical techniques in order to build up a homogeneous library containing both the protonation constants and the average distribution of the charged species, hence the net average charge as a function of pH. Moreover, correlations between chemical and cytotoxicity, have been attempted.

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Section: Introductionmentioning

confidence: 99%

Acid‐base properties of poly(amidoamine)s

Ranucci

Ferruti

Lattanzio

et al. 2009

J. Polym. Sci. A Polym. Chem.

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“…It was quite early ascertained that crosslinked PAAs and PAA‐grafted materials, for example silica, retained the ion‐complexing ability of their linear counterparts. This concept was more recently resumed by studying crosslinked amphoteric PAAs as specific heavy metal ion absorbers for water purification from inorganic pollutants.…”

Section: Physico‐chemical Propertiesmentioning

confidence: 99%

Poly(amidoamine)s: Past, present, and perspectives

Ferruti

2013

J. Polym. Sci. Part A: Polym. Chem.

122

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Poly(amidoamine)s (PAAs) are a family of synthetic polymers obtained by stepwise polyaddition of prim-or sec-amines to bisacrylamides. Nearly all conceivable bisacrylamides and prim-or sec-amines can be employed as monomers endowing PAAs of a structural versatility nearly unique among stepwise polyaddition polymers. PAAs are degradable in aqueous media, including physiological fluids. Many of them are remarkably biocompatible notwithstanding their cationic character. PAAs are per se highly functional polymers and, in addition, can be further functionalized giving rise to an endless variety of polymeric structures meeting the requisites for applications in such apparently disparate fields as inorganic water pollutants scavengers, sensors, drug and protein intracellular carriers, transfection promoters, peptidomimetic antiviral and antimalarial agents. In this review, the unique chemistry of PAAs is discussed and a vast library of PAA structures and PAA applications from the beginning to the present days reported.

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“…However, it must be borne in mind that, in complex systems such as hydrogels, relaxation data analysis is not straightforward since magnetization transfer between polymer and water protons via chemical exchange and/or cross-relaxation can occur and must therefore be taken into account. 5 NMR spectroscopy can also give site-specific information on the influence of hydration on polymer dynamics through 13 C cross-polarization (CP) and direct excitation (DE) magic-angle spinning (MAS) experiments. Whereas the former enhances signals arising from carbons strongly dipolarly coupled to protons, typically 13 C nuclei directly bonded to protons and in a rigid environment, the latter, performed with a very short recycle delay (on the order of seconds), shows only fast-relaxing carbon nuclei, usually located in quite mobile environments.…”

Section: Introductionmentioning

confidence: 99%

“…5 NMR spectroscopy can also give site-specific information on the influence of hydration on polymer dynamics through 13 C cross-polarization (CP) and direct excitation (DE) magic-angle spinning (MAS) experiments. Whereas the former enhances signals arising from carbons strongly dipolarly coupled to protons, typically 13 C nuclei directly bonded to protons and in a rigid environment, the latter, performed with a very short recycle delay (on the order of seconds), shows only fast-relaxing carbon nuclei, usually located in quite mobile environments.…”

Section: Introductionmentioning

confidence: 99%

Water/Polymer Interactions in a Poly(amidoamine) Hydrogel Studied by NMR Spectroscopy

2007

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Samples of PAAH1, a cross-linked polymer belonging to the family of poly(amidoamine)s, were investigated at different hydration levels by means of 13C and 1H NMR techniques in order to obtain information on water/polymer interactions. Carbonyl oxygens and amine nitrogens were identified as the main sites of interaction giving hydrogen bonding with water molecules. The polymer turned out to be uniformly plasticized already at moderate degrees of swelling. The hydration process was found to occur in a stepwise manner, with the first batch of water saturating a hydration layer and additional water filling the polymer meshes. The proportion of water in the different states was quantitatively determined.

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Applied macroinorganics. IV. Effect of the crosslinking agent on protonation, and metal ions complexing abilities, of ion exchange resins with poly(amido–amine) structure

Cited by 14 publications

References 4 publications

Acid‐base properties of poly(amidoamine)s

Acid‐base properties of poly(amidoamine)s

Poly(amidoamine)s: Past, present, and perspectives

Water/Polymer Interactions in a Poly(amidoamine) Hydrogel Studied by NMR Spectroscopy

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