Zobrazeno 1 - 10
of 39
pro vyhledávání: '"Adriaan De Vries"'
Autor:
Mary E. Neubert, Carol A. Hanlon, Michael J. Zawaski, Adriaan De Vries, Theresa Louise Benyo, Patricia J. Wildman
Publikováno v:
Molecular Crystals and Liquid Crystals. 145:111-157
The effect of replacingk an alkoxy (Y = OR') with an acyloxy (Y=OCOR') group on the phenolic end of the esters: on their mesomorphic properties has been studied. These esters were prepared by esterification of 4-acyloxyphenols with the appropriate ac
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3a0334bdcd9f505ef73d8259926213f9
https://doi.org/10.1080/00268948708080217
https://doi.org/10.1080/00268948708080217
Autor:
Henry A. Ellis, Adriaan De Vries
Publikováno v:
Molecular Crystals and Liquid Crystals Incorporating Nonlinear Optics. 163:133-138
X-ray diffraction is used to study structural changes associated with thermotropic phase transitions in a homologous series of even-chain-length lead(II) carboxylates from hexanoate to octadecanoate. For homologues above lead(II) dodecanoate, a lamel
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ee96c24ec834c8ca81e2999a0f8f5553
https://doi.org/10.1080/00268948808081993
https://doi.org/10.1080/00268948808081993
Autor:
Adriaan De Vries
Publikováno v:
Molecular Crystals and Liquid Crystals. 63:215-229
A systematic classification of thermotropic smectic phases has been developed, with fourteen different phase types. First, the assumption is made that inall smectic phases the molecular packing within the layers is based on a herringbone arrangement
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5571f630d65ec70ed99474eb3dcd6fef
https://doi.org/10.1080/00268948108071997
https://doi.org/10.1080/00268948108071997
Autor:
Mary E. Neubert, Adriaan De Vries
Publikováno v:
Molecular Crystals and Liquid Crystals. 145:1-15
Microscopic studies of the nematic phase in the 4-n-alkoxybenzoic acids have shown that the nematic-to-isotropic transition has a range ≥ 0.9° which is larger than the 0.2–0.3° range usually seen for this transition. This wide range was also ob
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d92085b29b53040569e453a9519d2490
https://doi.org/10.1080/00268948708080209
https://doi.org/10.1080/00268948708080209
Autor:
Adriaan de Vries
Publikováno v:
The Journal of Chemical Physics. 70:2705-2709
On the basis of evidence in the literature, it is concluded that the basic molecular packing underlying all smectic structures is a herringbone arrangement of the molecular planes with an orthogonal lattice of the molecular centers. Starting from thi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4f29b92527738e4d773b2954079e42d6
https://doi.org/10.1063/1.437856
https://doi.org/10.1063/1.437856
Publikováno v:
The Journal of Chemical Physics. 74:4048-4052
The biaxial smectic‐B‐type phase of 4‐n‐pentylbenzenethio‐4′‐n‐tetradecyloxybenzoate (14S5) has been studied along with its uniaxial smectic‐l B phase. The results are interpreted in terms of identical layer structures in both phase
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::97502f9d57f313871ca5499e322b7b99
https://doi.org/10.1063/1.441585
https://doi.org/10.1063/1.441585
Publikováno v:
Molecular Crystals and Liquid Crystals. 49:143-152
Even though the average molecular direction in smectic A phases is perpendicular to the smectic planes, most molecules in these phases have rather large tilt angles because the orientational order parameter S in all smectic A phases is significantly
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d62997f78dcffff9f50566c326586a4d
https://doi.org/10.1080/00268947908070345
https://doi.org/10.1080/00268947908070345
Publikováno v:
Molecular Crystals and Liquid Crystals. 139:299-320
The effect of inserting a ketone group in th α-positon of the alkyl chain on the phenolic end of 4,4'-disubstituted phenylbenzoates and di-(4'-subsituted phenyl)-trnas-cyclohexane-1, 4-dicarboxylates on mesomorphic properties as compared to those pr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::64672c1c090e87898559b6b0ccc05595
https://doi.org/10.1080/00268948608080135
https://doi.org/10.1080/00268948608080135
Autor:
Adriaan De Vries
Publikováno v:
Molecular Crystals and Liquid Crystals. 49:19-25
The most important experimental differences between solid crystals and liquid crystals with three-dimensional order are suggested to be that liquid crystals with optically active molecules form twisted structures, whereas solid crystals do not, and t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9a16605b7a8734d88918d462bfcfc77e
https://doi.org/10.1080/00268947808070321
https://doi.org/10.1080/00268947808070321
Autor:
Adriaan De Vries
Publikováno v:
Molecular Crystals and Liquid Crystals. 41:27-31
Experimental evidence is presented indicating that there are two distinctly different kinds of smectic C to smectic A transitions. The first type is second order with zero tilt in both phases, the second type is first order with a non-zero tilt angle
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::56339df643bbfbc21676db143752c747
https://doi.org/10.1080/01406567708071949
https://doi.org/10.1080/01406567708071949