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Pregled bibliografske jedinice broj: 667090

Časopis

Autori: Mihelj, Tea; Vojta, Danijela; Tomašić, Vlasta
Naslov: The diversity in thermal behavior of novel catanionic cholates: the dominant effect of quartenary ammonium centers
( The diversity in thermal behavior of novel catanionic cholates: the dominant effect of quartenary ammonium centers )
Izvornik: Thermochimica acta (0040-6031) 584 (2014); 17-30
Vrsta rada: članak
Ključne riječi: cholate anion; infrared spectroscopy; nuclear magnetic resonance spectroscopy; smectic; thermotropic
( cholate anion; infrared spectroscopy; nuclear magnetic resonance spectroscopy; smectic; thermotropic )
Sažetak:
The thermal behavior of novel catanionic compounds based on cholate anion was examined. The study explains the effect of the raising dodecyl chain number, as well as of the raising headgroup number in quaternary ammonium salts on their physico-chemical properties. The examined samples are crystal smectic phases at room temperature. Their rich and diverse thermal behavior is seen through polymorphic phase transitions, thermotropic mesomorphism of smectic nature and in some cases, kinetically managed crystallization that lasts in days. The changes of the cholates keto-enol isomer balance during thermal treatment are obtained. For both groups of samples temperatures of isotropisation and the thermodynamic parameters follow polynomial regression. Introduction of the new dodecyl chain leads to more ordered structure, while implementation the new headgroup leads to advanced polymer-like structure. The obtained results demonstrate an effort for getting and controlling the regularity of the physico-chemical and thermotropic properties for new compounds by systematic changing of cationic part of the molecule. These informations could provide in the future the easiest way for selection of potentially new and targeted applicable materials.
Projekt / tema: 098-0982915-2949, 098-0982904-2927
Izvorni jezik: eng
Rad je indeksiran u
bazama podataka:
Current Contents Connect (CCC)
Scopus
SCI-EXP, SSCI i/ili A&HCI
Science Citation Index Expanded (SCI-EXP) (sastavni dio Web of Science Core Collectiona)
Kategorija: Znanstveni
Znanstvena područja:
Kemija
URL Internet adrese: http://www.sciencedirect.com/science/article/pii/S0040603114001257
Broj citata:
Altmetric:
DOI: 10.1016/j.tca.2014.03.034
URL cjelovitog teksta:
Google Scholar: The diversity in thermal behavior of novel catanionic cholates: the dominant effect of quartenary ammonium centers
Upisao u CROSBI: Tea Mihelj (Tea.Mihelj@irb.hr), 20. Pro. 2013. u 11:15 sati



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