A Challenge on the Characterization of Poly(Styrene 4-vinylpyridine) copolymers by MALDI-TOF MS
| Autor: | M. S. Montaudo, S. Battiato, S. Zappia, S. Destri, F. Samperi |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: | |
| Zdroj: | ventitre-esimo convegno AIM, catania, 09-11/9/2018 info:cnr-pdr/source/autori:M. S. Montaudo, S. Battiato, S. Zappia, S. Destri, F. Samperi/congresso_nome:ventitre-esimo convegno AIM/congresso_luogo:catania/congresso_data:09-11%2F9%2F2018/anno:2018/pagina_da:/pagina_a:/intervallo_pagine |
| Popis: | Nitroxide-mediated controlled-radical polymeriza-tion (NMRP) is a promising technique. Poly( styrene-co-4-vinylpyridine) [P(S-4VP)] random copolymers with different molar composition were synthesized by NRMP using (2,2,5-Trimethyl-4-phenyl-3-azahexane-3-nitroxide) (TIPNO) as a mediator. We record the MALDI-TOF spectra under various conditions. We state the conjecture (referred to as the fifty-percent conjecture) that the nitroxide is a labile bond and thus it is impossible to find MALDI conditions in which the number of intact ions is larger than one-half. The idea is to find an excep-tion. In this way, MALDI spectra allow for the determination of all end-groups, even some less-abundant ones. |
| Databáze: | OpenAIRE |
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