33905-66-7Relevant academic research and scientific papers
Mesogenic Pyrrole Derivatives in Langmuir-Blodgett Films
Jego, C.,Agricole, B.,Vicentini, F.,Barrouillet, J.,Mauzac, M.,Mingotaud, C.
, p. 13408 - 13413 (1994)
A pyrrole monomer linked through a spacer of various lengths (0, 3, or 8 carbons) to a mesogenic core has been studied in Langmuir and Langmuir-Blodgett (LB) films.Pure monolayers of these mesogenic pyrrole derivatives have been transferred onto solid sub
POLYMERIZABLE COMPOUND, POLYMERIZABLE COMPOSITION AND OPTICALLY ANISOTROPIC BODY PRODUCTION METHOD
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Paragraph 0260; 0262; 0298-0299, (2020/10/27)
PROBLEM TO BE SOLVED: To provide a production method of a polymerizable compound which hardly causes a yield decline due to alkali treatment, where discoloration hardly occurs in heat treatment of a film-shaped polymer formed from a polymerizable liquid crystal composition to which the polymerizable compound is added. SOLUTION: The invention provides a production method of a compound represented by general formula (IV). The invention also provides a production method of a polymerizable composition containing the compound, and a production method of an optically anisotropic body obtained by polymerizing the composition. SELECTED DRAWING: None COPYRIGHT: (C)2021,JPOandINPIT
Theoretical and experimental study on the effect of end chain length on ultraviolet absorption behavior and photostability of alkoxy benzoate based liquid crystals
El Defrawy, Ahmed M.,Mohammady, Said Z.,Elghalban, Marwa G.,El-Sharief, Hossa F.
, p. 1190 - 1199 (2017/07/28)
Liquid crystals homologous of 4-(4-chlorobenzoyloxy)phenyl 4-(n-alkoxy)benzoate (n CBPAB: n=8,14,16, where n is the number of carbon atoms in the alkoxy chain) were prepared and investigated for their liquid crystalline properties. The geometrical paramet
PROTON-TRANSLOCATING COMPOUND, PROTON-TRANSLOCATING MATERIAL COMPOSITION, ELECTRONIC DEVICE AND PROTON-TRANSLOCATING ELECTROLYTE FILM
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Paragraph 0117, (2016/10/10)
PROBLEM TO BE SOLVED: To provide a proton-translocating compound and a proton-translocating material composition which are capable of maintaining a liquid crystal phase in a wide temperature range and thereby function in a wide temperature range, and various electronic devices using the compound or composition. SOLUTION: The proton-translocating compound is represented by the general formula (1) in the figure. COPYRIGHT: (C)2015,JPOandINPIT
Synthesis, mesomorphic and dielectric properties of 4-(cyanomethoxy)phenyl 4-alkoxybenzoates, 4-(cyanomethoxy)-4′-alkoxyazo- and -azoxybenzenes
Kuvshinova,Burmistrov,Novikov,Litov,Aleksandriiskii,Koifman
, p. 615 - 620 (2014/07/08)
Preparation methods were developed for homologs of 4-(cyanomethoxy)phenyl 4-alkoxybenzoates (C7, C8, C9), 4-(cyanomethoxy)-4′-alkoxyazo (C2, C3, C 6), -azoxybenzenes (C3, C6) whose composition and structure were proved by elemental analysis and 1H NMR spectra. 4-(Cyanomethoxy) group destabilizes the mesophase, consequently, only four among the compounds obtained exhibit the thermotropic nematic mesomorphism.
2-Hydroxybenzoic acid esters: Synthesis, complexes with Tb(III), and their luminescence characteristics
Kondrat'Eva,Novikova,Meshkova,Topilova,Doga
, p. 786 - 792 (2015/03/03)
New esters of 2-hydroxybenzoic acid and 4-(4-alkoxybenzoyloxy)phenols, forming liquid crystals, were synthesized. These compounds in solution form complexes with Tb(III), exhibiting photoluminescence properties.
Synthesis and characterization of two phenyl ring core-based thiophene mesogens
Reddy, M. Kesava,Reddy, K. Subramanyam,Prakash,Narasimhaswamy
, p. 1 - 14 (2013/11/06)
Novel thiophene mesogens built with two phenyl ring core and alkoxy terminal chains are synthesized by multistep route. The phenyl ring core is connected to thiophene by ester unit at (a) 2-position and (b) 3-position to yield 2-series of mesogens. The structural characterization of them is accomplished by using spectroscopy tools and the mesophase characteristics are evaluated by HOPM and DSC. The 13C chemical shifts of representative mesogens calculated from DFT by quantum chemical calculations are compared with experimental 13C chemical shifts and further utilized for structural assignment of core unit carbons. A good agreement between calculated and experimental values is noticed. An enantiotropic nematic phase is confirmed for all the mesogens and accordingly threaded nematic texture in HOPM is observed and is supported by DSC transition enthalpy values. The mesophase as well as thermal stabilities of the mesogens are discussed with reference to terminal chain length and position of the linking unit on thiophene.
Mesogenic 4-acryloyloxy- and 4-(2,3-epoxypropoxy)phenyl 4-alkoxybenzoates
Syrbu,Potemkina,Novikov,Kuvshinova,Koifman,Aleksandriiskii,Burmistrov
, p. 208 - 211 (2013/07/25)
Procedures were developed which made it possible to synthesize in good yields homologs of 4-acryloyloxyphenyl 4-alkoxybenzoates (C3, C 5, C7, C8) and of 4-(2,3-epoxypropoxy)phenyl 4-alkoxybenzoates (C5, C7). The substituted phenylbenzoates obtained exhibit the enantiotropic nematic mesomorphism in a sufficiently wide temperature range. The studied compounds have absorption maxima in the near UV region and a high temperature of decomposition beginning.
Study of activation energy and order of reaction of some liquid crystals
Mundhe
, p. 246 - 249 (2007/10/03)
Liquid crystals of the type p-phenylene-di-p-n-alkoxy benzoate have been prepared. Kissinger isothermal decomposition method has been used for determination of activation energy values of liquid crystals. Kissinger's assessment for shape index of DTA peaks is used to find the order of reaction. There is no direct relationship between the carbon atoms in terminal methylene groups and Ea values. Order of reaction value decreases with increase in heating rate upto carbon atoms 10 in the terminal methylene group but beyond this the order increases or decreases.
The synthesis and mesomorphism of di-, tetra- and hexa-catenar liquid crystals based on 2,2′-bipyridine
Rowe, Kathryn E.,Bruce, Duncan W.
, p. 331 - 341 (2007/10/03)
2,2′-Bipyridines are known to coordinate to a wide variety of metal centres. In this paper, liquid-crystalline two-chained (dicatenar), four-chained (tetracatenar) and six-chained (hexacatenar) bipyridines are synthesised and their mesomorphism is described. For the tetracatenar bipyridines, a full homologous series, from tetramethoxy to tetratetradecyloxy, was synthesised, and the phase diagram showed a classic progression from nematic and smectic C phases at short chain length, through a cubic phase to a columnar phase.
