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Pregled bibliografske jedinice broj: 633864

Časopis

Autori: Tomašić, Vlasta; Biliškov, Nikola; Mihelj, Tea; Štefanić, Zoran
Naslov: Thermal Behaviour and Structural Properties of Surfactant - Picrate Compounds: the effect of the ammonium headgroup number
( Thermal Behaviour and Structural Properties of Surfactant - Picrate Compounds: the effect of the ammonium headgroup number )
Izvornik: Thermochimica acta (0040-6031) 569 (2013); 25-35
Vrsta rada: članak
Ključne riječi: picric acid; cationic oligomeric surfactant; infrared spectroscopy; thermal analysis; crystal structure
( picric acid; cationic oligomeric surfactant; infrared spectroscopy; thermal analysis; crystal structure )
Sažetak:
Novel quaternary n-dodecyldimethylammonium picrates with two to four chains connected by an ethylene spacer at the ammonium headgroup level were synthesized. The effect of the headgroup number and the impact of picrate anion to their physicochemical properties was examined. Crystal structure of dimeric dipicrate is significantly different from bromide analogue. The dominant feature of this crystal packing is a layered structure with aromatic rings of picrate molecules, stacked via strong π•••π interactions and connected to the alkylammonium molecules with their nitro groups by C-H•••O hydrogen bonds. Weak NO2···HC hydrogen bonds further stabilize the structure. Higher degree of oligomerization leads to the less ordered solid phase and amorphous picrate structure. These amorphous structures result from widespread and disordered hydrogen bonding and rupture of π-π stacking in samples with more than two headgroups. Unlike corresponding bromides, picrate compounds show reversible phase transitions without thermal decomposition. Temperature-dependent infrared spectroscopy in the liquid phase detected adiabatic phase transitions.
Projekt / tema: 098-1191344-2943, 098-0982915-2949
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://dx.doi.org/10.1016/j.tca.2013.06.041
http://www.sciencedirect.com/science/article/pii/S0040603113003602
http://ac.els-cdn.com/S0040603113003602/1-s2.0-S0040603113003602-main.pdf?_tid=3dc5aca2-f90c-11e2-9763-00000aab0f27&acdnat=1375184354_6e8272d801bf9cdf888358968a41d076
Broj citata:
Altmetric:
DOI: 10.1016/j.tca.2013.06.041
URL cjelovitog teksta: http://dx.doi.org/10.1016/j.tca.2013.06.041
Google Scholar: Thermal Behaviour and Structural Properties of Surfactant - Picrate Compounds: the effect of the ammonium headgroup number
Upisao u CROSBI: Tea Mihelj (Tea.Mihelj@irb.hr), 21. Lip. 2013. u 10:55 sati



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