Liquid crystal naphtalene compounds, represented by the following formula (1) are disclosed.
R-Z-A-NAP-Z′-R′ (1)
In the formula (1), R is an alkyl group containing 1 to 18 carbon atoms; R′ is an alkyl group containing 1 to 21 carbon atoms; NAP represents 2,6-naphthylene group; A, Z and Z′ are as follows: 1) A is Pyr> and (a) Z is - or # and Z′ is O, or (b) Z is - and Z′ is COO; 2) if A is Pym>, (a) Z is - and Z′ is O, or (b) Z is O and Z′ is -, O or #; 3) A is FPhF and (a) Z is - or O and Z′ is -, O or COO, (b) Z is OCO and Z′ is - or O, or (c) Z is # and Z′ is O; 4) A is PhF and (a) Z is - or # and Z′ is O, (b) Z is O and Z′ is -, or (c) Z is - and Z′ is COO; 5) A is FPh and (a) Z is O and Z′ is-, (b) Z is -, O, # or OCO and Z′ is O, or (c) Z is O and Z′ is COO; 6) A is
液晶萘化合物的化学式如下所示:R-Z-A-NAP-Z′-R′。在这个化学式中,R是含有1到18个碳原子的烷基基团;R′是含有1到21个碳原子的烷基基团;NAP代表2,6-萘基团;A、Z和Z′的具体定义如下:
1)如果A是Pyr,(a) Z是-或#,Z′是O;或者(b) Z是-,Z′是COO;
2)如果A是Pym,(a) Z是-,Z′是O;或者(b) Z是O,Z′是-、O或#;
3)如果A是FPhF,(a) Z是-或O,Z′是-、O或COO;(b) Z是OCO,Z′是-或O;或者(c) Z是#,Z′是O;
4)如果A是PhF,(a) Z是-或#,Z′是O;(b) Z是O,Z′是-;或者(c) Z是-,Z′是COO;
5)如果A是FPh,(a) Z是O,Z′是-;(b) Z是-、O、#或OCO,Z′是O;或者(c) Z是O,Z′是COO;
6)如果A是
Synthesis and structure of tetrathiophene with a chiral 1,1′-binaphthyl kink
作者:Andrzej Rajca、Hua Wang、Visa Pawitranon、Tom J. Brett、John J. Stezowski
DOI:10.1039/b007355p
日期:——
A chiral oligothiophene, possessing in-chain chirality, was prepared and its racemate was characterized by single crystal X-ray crystallography; the in-chain chiral 1,1′-binaphthyl moiety interrupts the π-conjugation and affects the solid state properties of the oligothiophene.
制备了具有链内手性的手性低聚噻吩,并对其外消旋体进行了单晶X射线晶体学表征;链内手性 1,1'-联萘部分会中断 π 共轭并影响低聚噻吩的固态特性。
Impact of Substitution Pattern and Chain Length on the Thermotropic Properties of Alkoxy-Substituted Triphenyl-Tristriazolotriazines
作者:Thorsten Rieth、Natalie Tober、Daniel Limbach、Tobias Haspel、Marcel Sperner、Niklas Schupp、Philipp Wicker、Stefan Glang、Matthias Lehmann、Heiner Detert
DOI:10.3390/molecules25235761
日期:——
Tristriazolotriazines (TTTs) with a threefold alkoxyphenyl substitution were prepared and studied by DSC, polarized optical microscopy (POM) and X-ray scattering. Six pentyloxy chains are sufficient to induce liquid-crystalline behavior in these star-shaped compounds. Thermotropic properties of TTTs with varying substitution patterns and a periphery of linear chains of different lengths, branching
通过 DSC、偏光光学显微镜 (POM) 和 X 射线散射制备并研究了具有三重烷氧基苯基取代的三三唑并三嗪 (TTT)。六个戊氧基链足以在这些星形化合物中诱导液晶行为。比较了具有不同取代模式和不同长度的线性链外围、链中分支和燕尾的 TTT 的热致性质。一般来说,这些盘显示出广泛且稳定的热致中间相,切向 TTT 优于径向异构体。研究了烷基链的数量、位置、长度和结构的构效关系。
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