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Dynamics and phase transitions of 4-bromobenzylidene-4'-pentyloxyaniline and 4-bromobenzylidene-4'-hexyloxyaniline as studied by dielectric spectroscopy.
Autorzy
Rok wydania
2013
Czasopismo
Numer woluminu
124
Strony
913-916
DOI
10.12693/APhysPolA.124.913
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
Signi cant dierences in phase sequence and dynamics between 4-bromob enzylidene-40-p entyloxyaniline(5BBA)and-bromob enzylidene-40-heksyloxyaniline(6BBA)substances were detected by broadband dielectric spectroscopy.In the smectic A (6BBA),the smectic B(found in both substances)and the smectic E(5BBA)phases the relaxation was ascribed to reorientations of the molecules
around the short axes.Slow dynamics detected in the smectic E and in two crystalline phases of 5BBAwas ascrib ed to conformational changes of molecular chains.Coexistence of Cr(I)andCr(I I)conformationally disordered crystal(CONDIS)phases was observed and vitri cation of Cr(I I)was identi ed with help of polarizing microscopy.
Adres publiczny
http://dx.doi.org/10.12693/APhysPolA.124.913
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