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Fotoinducirana polimerizacija samo-udruženih bis(aminokiselina)fumaramida


Gregorić, Tomislav; Makarević, Janja; Frkanec Leo
Fotoinducirana polimerizacija samo-udruženih bis(aminokiselina)fumaramida // XII.Susret mladih kemijskih inženjera
Zagreb, Hrvatska, 2018. str. xx-xx (predavanje, domaća recenzija, sažetak, znanstveni)


Naslov
Fotoinducirana polimerizacija samo-udruženih bis(aminokiselina)fumaramida
(Photoinduced polymerization of self-assmbled bis (amino acid) fumaramides)

Autori
Gregorić, Tomislav ; Makarević, Janja ; Frkanec Leo

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Skup
XII.Susret mladih kemijskih inženjera

Mjesto i datum
Zagreb, Hrvatska, 22-23.02.2018

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Domaća recenzija

Ključne riječi
Gamma i foto- polimerizacija, supramolekularni gelovi, samo-udruge
(Gamma and photo rays polymerisation, supramolecular gels, self assembly)

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.

Izvorni jezik
Engleski

Znanstvena područja
Kemija



POVEZANOST RADA


Projekt / tema
HRZZ-IP-2013-11-7387 - Supramolekulska sinteza samo-organizirajućih funkcionalnih nanomaterijala i kompleksnih kemijskih sustava (Leo Frkanec, )

Ustanove
Institut "Ruđer Bošković", Zagreb