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Pregled bibliografske jedinice broj: 927551

Zbornik radova

Autori: Gregorić, Tomislav; Makarević, Janja; Frkanec Leo
Naslov: Fotoinducirana polimerizacija samo-udruženih bis(aminokiselina)fumaramida
Izvornik:
Skup: XII.Susret mladih kemijskih inženjera
Mjesto i datum: Zagreb, Hrvatska, 22-23.02.2018.
Ključne riječi: gamma i foto- polimerizacija, supramolekularni gelovi, samo-udruge
Sažetak:
We investigated the influence of self-assembly organogelators on polymerisation in gels by ultraviolet irradiation. For UV irradiation we used high-pressure Hg lamp (100W) and photoinitiator benzophenone. Synthesis part of this work was to prepare a methyl ester of bis(Leu)fumarate and vinyl esters of bis(L-Leu or L-Val)fumarate (1 and 2 Fig 1.) by the reaction of fumaryl chloride with vinyl ester of the appropriate amino acid. Amino acid vinyl esters were prepared by the Pd-catalyzed transvinylation with vinyl acetate. These compounds are gelator of various organic solvent. After preparation of supramolecular gels of bis(Leu or Val)fumarate in toluene, the resulting material was exposed to UV rays. The obtained materials after irritation are polymers with a different network pattern of bis(L-Leu)fumarate and bis(L-Val)fumarate as a direct link of different self-assembly. Morphological study by SEM shows that the morphology of gel-network and polymer-network did not change significantly upon polymerization as confirm of the initial self- organized aggregates. Using FTIR spectroscopy data for solid matter and polymer matter we noticed that the characteristic stretching at 996 cm-1 (ascribed to fumaryl) and 947 cm-1 (characteristic for vinyl esters) are disappearing. Bis(Leu)fumarate polymer using UV irradiation mostly polymerizable through fumaric double bound but bis(Val)fumarate polymer through vinyl esters. UV irradiation of the methyl ester of bis(L-Leu)fumarate in a solution gave cyclobutane ring in [2+2] cycloaddition reaction.
Vrsta sudjelovanja: Predavanje
Vrsta prezentacije u zborniku: Sažetak
Vrsta recenzije: Domaća recenzija
Projekt / tema: HRZZ-IP-2013-11-7387
Izvorni jezik: ENG
Kategorija: Znanstveni
Znanstvena područja:
Kemija
Upisao u CROSBI: Tomislav Gregorić (Tomislav.Gregoric@irb.hr), 26. Vel. 2018. u 09:34 sati



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