Zobrazeno 1 - 10
of 208
pro vyhledávání: '"Frank Giesselmann"'
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-9 (2024)
Abstract Many ferroelectric nematic liquid crystals, like one of the archetype materials, DIO, do not have a direct paraelectric N to ferroelectric NF phase transition, but exhibit yet another phase between N and NF. This phase has recently been prop
Externí odkaz:
https://doaj.org/article/778c5d977b114254bfa63a0cbbd1a71a
Autor:
Pierre Nacke, Atsutaka Manabe, Melanie Klasen-Memmer, Xi Chen, Vikina Martinez, Guillaume Freychet, Mikhail Zhernenkov, Joseph E. Maclennan, Noel A. Clark, Matthias Bremer, Frank Giesselmann
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-13 (2024)
Abstract We present a new ferroelectric nematic material, 4-((4′-((trans)-5-ethyloxan-2-yl)-2′,3,5,6′-tetrafluoro-[1,1′-biphenyl]-4-yl)difluoromethoxy)-2,6-difluorobenzonitrile (AUUQU-2-N) and its higher homologues, the molecular structures o
Externí odkaz:
https://doaj.org/article/98f0965863404646aad1924b2dc0a06c
Publikováno v:
Gels, Vol 10, Iss 4, p 261 (2024)
The combination of lyotropic liquid crystals (LLCs) and low-molecular-weight gelators (LMWGs) for the formation of lyotropic liquid crystal gels (LLC gels) leads to a versatile and complex material combining properties of both parent systems. We gell
Externí odkaz:
https://doaj.org/article/113c3737d36e498db260d1f7faada3dc
Autor:
Johanna R. Bruckner, Frank Giesselmann
Publikováno v:
Crystals, Vol 9, Iss 11, p 568 (2019)
Only six years ago, the first clear-cut example of a ferroelectric, lyotropic liquid crystal was discovered. Since then, ongoing investigations in this new research field provided numerous instances of the missing pieces to complete the formerly blan
Externí odkaz:
https://doaj.org/article/cd8cca85091b442d89dd7fb258dcabc0
Publikováno v:
Crystals, Vol 9, Iss 2, p 74 (2019)
The Li+- and K+-complexes of new discotic mesogens, where two n-alkoxy-substituted triphenylene cores are connected by a central crown ether (12-crown-4 and 18-crown-6), provide interesting structural and electronic properties. The inter- and intra-c
Externí odkaz:
https://doaj.org/article/633e393d91164575ba476d3b1d22b8fa
Publikováno v:
Beilstein Journal of Organic Chemistry, Vol 9, Iss 1, Pp 425-436 (2013)
Several new calamitic liquid-crystalline (LC) materials with flexible hydrophilic chains, namely either hydroxy groups or ethylene glycol units, or both types together, have been synthesized in order to look for new functional LC materials exhibiting
Externí odkaz:
https://doaj.org/article/b935c36cd135461a9ecba19c692b3adb
Autor:
Nadia Kapernaum, Friederike Knecht, C. Scott Hartley, Jeffrey C. Roberts, Robert P. Lemieux, Frank Giesselmann
Publikováno v:
Beilstein Journal of Organic Chemistry, Vol 8, Iss 1, Pp 1118-1125 (2012)
A system of two liquid-crystalline phenylpyrimidines differing strongly in molecular length was studied. The phase diagram of these two chemically similar mesogens, with a length ratio of 2, was investigated, and detailed X-ray diffraction and electr
Externí odkaz:
https://doaj.org/article/c838d67df5794227a489c00f8fca918e
Autor:
Gundula F. Starkulla, Elisabeth Kapatsina, Angelika Baro, Frank Giesselmann, Stefan Tussetschläger, Martin Kaller, Sabine Laschat
Publikováno v:
Beilstein Journal of Organic Chemistry, Vol 5, Iss 1, p 63 (2009)
Based on 5-(4-hydroxyphenyl)-2-octylpyrimidine 8, 5-phenylpyrimidine derivatives 3–7, 9 with different spacer chain lengths (C2 up to C6) and different terminal polar groups (Br, Cl, N3, OH, CN) were synthesized by etherification and nucleophilic s
Externí odkaz:
https://doaj.org/article/810725254b3b46bbad6127e59befba65
Publikováno v:
Beilstein Journal of Organic Chemistry, Vol 5, Iss 1, p 65 (2009)
The phase diagrams of two mixtures of chemically similar smectogenic mesogens strongly differing in molecular length were investigated. In these mixtures the nematic phase present in the pure short mesogen disappeared rapidly on the addition of the l
Externí odkaz:
https://doaj.org/article/f6c3b015f68246ddb97082f0e40dc4f6
Publikováno v:
Beilstein Journal of Organic Chemistry, Vol 5, Iss 1, p 57 (2009)
Tetraphenylenes 2 with eight peripheral gallic esters were prepared in two steps from octamethoxytetraphenylene 1 in 19–72% yield. Investigation of the mesomorphic properties of 2 by DSC, POM and X-ray diffraction revealed that derivatives 2a–d w
Externí odkaz:
https://doaj.org/article/5da3dda7d35349d5be8fdf9f7345302b