Influence of molecular structure on helicoidal structure and NMR spectra of chiral liquid crystalline esters

Journal Title: Bulletin of the Military University of Technology - Year 2017, Vol 66, Issue 2

Abstract

Three-ring chiral liquid crystalline compounds, forming antiferroelectric phase, differing in the structure of alkyl chain and in the substitution of benzene ring by fluorine atoms were studied. The measurements of helical pitch, based on the selective light reflection phenomenon, were performed as well as 1H and 13C NMR spectra at room temperature were registered. The influence of molecular structure as well as the type of helicoidal structure on the chemical shift of signals coming from chiral center was observed. Keywords: liquid crystals, helicoidal structure, nuclear magnetic resonance, antiferroelectric phase

Authors and Affiliations

Anna Drzewicz, Marzena Tykarska, Mateusz Szala, Magdalena Żurowska

Keywords

Related Articles

Influence of air-entraining admixture on strength development of cement composites containing fly ash addition

The results of laboratory investigation concerning the influence of the air-entraining admixturecontent [i]d[/i]/[i]C[/i], the [i]W[/i]/[i]C[/i] ratio, and the time of curing[i] τ[/i] on the compressive strength [i]f[su...

Low cost GNSS receivers in time synchronization systems

The GNSS (GNSS — Global Navigation Satellite Systems) receivers can be utilized to obtain accurate time markers. The preliminary results of the cheap GNSS receivers’ tests are presented in the paper. The one receiver’s p...

Interference Reduction Selected Measurement Signals of Ships

The paper presents problems encountered at the signal processing of mechanical values with electric methods. Depending on the measured quantity, the location of the sensors and the analysis frequency band, they are diffe...

Defence against weapons of mass destruction. Technical and functional solutions in personal protection for Territorial Defence Forces

The paper characterises methods of defence for use against weapons of mass destruction, as a form of troop protection system in the event of a contamination (infection) hazard from both the functional and the task-orient...

An influence of eccentricity of load on progressive crushing behaviour of isotropic square-tube columns with dimples

The object of the research was a thin-walled energy absorber made of aluminium in the form of a column having square-cross section and a series of dimples in the corners. An influence of the eccentric load on sub-critica...

Download PDF file
  • EP ID EP193716
  • DOI 10.5604/01.3001.0010.1887
  • Views 103
  • Downloads 0

How To Cite

Anna Drzewicz, Marzena Tykarska, Mateusz Szala, Magdalena Żurowska (2017). Influence of molecular structure on helicoidal structure and NMR spectra of chiral liquid crystalline esters. Bulletin of the Military University of Technology, 66(2), 25-35. https://www.europub.co.uk/articles/-A-193716