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Pregled bibliografske jedinice broj: 257286

Synergic effect in gelation by two-component mixture of chiral gelators


Džolić, Zoran; Wolsperger, Kristina; Žinić, Mladen
Synergic effect in gelation by two-component mixture of chiral gelators // New Journal of Chemistry, 30 (2006), 10; 1411-1419 (međunarodna recenzija, članak, znanstveni)


CROSBI ID: 257286 Za ispravke kontaktirajte CROSBI podršku putem web obrasca

Naslov
Synergic effect in gelation by two-component mixture of chiral gelators

Autori
Džolić, Zoran ; Wolsperger, Kristina ; Žinić, Mladen

Izvornik
New Journal of Chemistry (1144-0546) 30 (2006), 10; 1411-1419

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
amino acids; chirality; gels; self-assembly; supramolecular chemistry

Sažetak
Observation of the synergic gelation effect (SGE) in two-component gels is reported. An equimolar mixture of (S, S)-bis(LeuOH) oxalamide [(S, S)-1] and (S, S)-bis(leucinol) oxalamide [(S, S)-2] is capable to gel up to 7 times larger a volume of p-xylene than an equal mass of each component and an up to 5 times larger a volume than an equal mass of the (S, S)-1 + (R, R)-2 or (S, S)-1 + rac-2 equimolar mixture. The homochiral (S, S)-1 + (S, S)-2 combination of gelators is capable of hardening a volumes up to 5 times larger volume of certain solvents than the heterochiral (S, S)-1 + (R, R)-2 combination. Experimental evidence provided by determination of gelation efficiency, by 1H-NMR, TEM and XRD studies, by determination of phase transition diagrams and calculations of thermodynamic parameters for gel melting processes shows that synergism depends on the chirality of the components, on the solvent properties and on the gel morphology. It was found that each component tends to form reversed bilayers in lipophilic solvents which then interact and organize into gel unit fibers. The unit fibers formed by interaction of the (S, S)-1 and (S, S)-2 bilayers and of the (S, S)-1 and (R, R)-2 bilayers are distereoisomeric. In certain solvents, such diastereomeric unit fibers give different gel morphologies which in turn results by different thermal stabilities of the gels and in some cases by dramatically different gelling efficiencies of gelator mixtures. The latter observation is denoted as the synergic gelation effect (SGE).

Izvorni jezik
Engleski

Znanstvena područja
Kemija



POVEZANOST RADA


Projekti:
0098059
0098053

Ustanove:
Institut "Ruđer Bošković", Zagreb


Citiraj ovu publikaciju:

Džolić, Zoran; Wolsperger, Kristina; Žinić, Mladen
Synergic effect in gelation by two-component mixture of chiral gelators // New Journal of Chemistry, 30 (2006), 10; 1411-1419 (međunarodna recenzija, članak, znanstveni)
Džolić, Z., Wolsperger, K. & Žinić, M. (2006) Synergic effect in gelation by two-component mixture of chiral gelators. New Journal of Chemistry, 30 (10), 1411-1419.
@article{article, year = {2006}, pages = {1411-1419}, keywords = {amino acids, chirality, gels, self-assembly, supramolecular chemistry}, journal = {New Journal of Chemistry}, volume = {30}, number = {10}, issn = {1144-0546}, title = {Synergic effect in gelation by two-component mixture of chiral gelators}, keyword = {amino acids, chirality, gels, self-assembly, supramolecular chemistry} }
@article{article, year = {2006}, pages = {1411-1419}, keywords = {amino acids, chirality, gels, self-assembly, supramolecular chemistry}, journal = {New Journal of Chemistry}, volume = {30}, number = {10}, issn = {1144-0546}, title = {Synergic effect in gelation by two-component mixture of chiral gelators}, keyword = {amino acids, chirality, gels, self-assembly, supramolecular chemistry} }

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus


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  • Chemical Abstracts





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