http://www.cnr.it/ontology/cnr/individuo/prodotto/ID193828
Synthesis of polyarylacetylenes by gamma-ray-induced polymerization of terminal alkynes. Nanostructures of ortho-substituted derivatives (Articolo in rivista)
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- Label
- Synthesis of polyarylacetylenes by gamma-ray-induced polymerization of terminal alkynes. Nanostructures of ortho-substituted derivatives (Articolo in rivista) (literal)
- Anno
- 2012-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1002/pola.26329 (literal)
- Alternative label
M. Bassetti, I. Fratoddi, L. Lilla, C. Pasquini, M. V. Russo, O. Ursini (2012)
Synthesis of polyarylacetylenes by gamma-ray-induced polymerization of terminal alkynes. Nanostructures of ortho-substituted derivatives
in Journal of polymer science. Part A, Polymer chemistry; J. Wiley & sons, New York (Stati Uniti d'America)
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- M. Bassetti, I. Fratoddi, L. Lilla, C. Pasquini, M. V. Russo, O. Ursini (literal)
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- selezionato per l'inside cover page del fascicolo 24, 2012 (literal)
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- http://onlinelibrary.wiley.com/doi/10.1002/pola.v50.24/issuetoc (literal)
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- Istituto CNR di Metodologie Chimiche, Sezione Meccanismi di Reazione, and Dipartimento di Chimica, Sapienza Università di Roma, P.le A. Moro 5, 00185 Roma, Italy
Dipartimento di Chimica and Centro delle Nanotecnologie per l'Ingegneria della Sapienza (CNIS), Sapienza Università di Roma, P.le A. Moro 5, 00185 Roma, Italy
Istituto CNR di Metodologie Chimiche, Area della Ricerca di Roma, 00016 Monterotondo Stazione (RM), Italy (literal)
- Titolo
- Synthesis of polyarylacetylenes by gamma-ray-induced polymerization of terminal alkynes. Nanostructures of ortho-substituted derivatives (literal)
- Abstract
- Terminal aryl alkynes RC6H4CCH with substituents
of different electronic properties and ring position (R= H, 4-
CF3, 4-OMe, 2-CF3, 2-OMe, 2-Me) were exposed to c-radiation
(50-400 kGy) in organic solvents (hexane, 1,4-dioxane, ethylacetate,
methanol, tetrahydrofuran), at room temperature. The
effects arising from substituent, solvent, dilution, and radiation
dose allowed to define the conditions suitable for polymerization,
which was favored in methanol at increasing dilution of
the alkyne. Ortho-substitution represented the key structural
element in the substrate, and the derived polyarylacetylenes
were characterized in detail, including gel permeation chromatography,
thermal analysis, infrared, NMR, UV-vis, fluorescence,
and scanning electron microscope spectroscopy. The
results are consistent with the formation of irregular polymers
mainly composed of trans-transoid chains. Controlled aggregation
of the polymers by means of an osmosis-based procedure
in solvent/non-solvent mixtures allowed the formation of
nanostructured materials, in particular of hollow nanospheres
from THF/water. The methodology sets the basis for the
development of gamma-rays-induced polymerization of alkynes, in a
transition metal catalyst-free environment. (literal)
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