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Pregled bibliografske jedinice broj: 964644

Fine-tuning effect of p–p interactions on the stability of the NTB phase


Knežević, Anamarija; Sapunar, Marin; Buljan, Anđela; Dokli, Irena; Hameršak, Zdenko; Kontrec, Darko; Lesac, Andreja
Fine-tuning effect of p–p interactions on the stability of the NTB phase // Soft matter, 14 (2018), 8466-8474 doi:10.1039/c8sm01569d (međunarodna recenzija, članak, znanstveni)


Naslov
Fine-tuning effect of p–p interactions on the stability of the NTB phase

Autori
Knežević, Anamarija ; Sapunar, Marin ; Buljan, Anđela ; Dokli, Irena ; Hameršak, Zdenko ; Kontrec, Darko ; Lesac, Andreja

Izvornik
Soft matter (1744-683X) 14 (2018); 8466-8474

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

Ključne riječi
Liquid crystals ; dimers ; twist-bend nematogen ; π-π interactions

Sažetak
The synthesis and liquid-crystalline properties are reported for novel bent-shaped dimers in which naphthyl group has been incorporated into the mesogenic cores. In addition to the nematic and twist-bend nematic phase, a new liquid- crystalline phase was observed. The combined experimental and computational study demonstrated how the interplay between the molecular geometry and π- interactions affect the thermal stability of the twist-bend nematic and nematic phases. Correlation between mesomorphic properties and molecular geometry revealed that a greater conformational diversity leads to a broader distribution of bend-angles and destabilization of the NTB phase. Qualitative correlation between the thermal behaviour and electronic structure of the molecules of a similar geometry suggested that the transition temperatures of both nematic phases depend on the relative contribution of dispersion and electrostatic energies which determines the strength of the π-π interactions. These results provide an insight into how subtle changes in chemical structure can be exploited to tune the intermolecular interactions and influence the thermal stability of the liquid crystalline phase.

Izvorni jezik
Engleski

Znanstvena područja
Kemija



POVEZANOST RADA


Projekt / tema
HRZZ-IP-2014-09-1525 - Kiralnost od akiralnih tekućih kristala (Andreja Lesac, )

Ustanove
Institut "Ruđer Bošković", Zagreb

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
  • MEDLINE


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