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
Tailoring boron liquid crystals: Mesomorphic properties of iminodiacetic acid boronates
作者:Christopher Schilling、Alina Bauer、Julius A. Knöller、Finn Schulz、Anna Zens、Sabine Laschat
DOI:10.1016/j.molliq.2022.120519
日期:2022.12
k = 1 – 3), or N-methyl in combination with bend meta-alkoxyphenyl (Ph(n)metaMIDA), linear alkoxy-pyridyl (Pyr(n)1MIDA) and -pyrimidinyl (Pym(n)1MIDA) respectively, were prepared. Analysis by differential scanning calorimetry (DSC), polarizing optical microscopy (POM) and X-ray diffraction (WAXS, SAXS) revealed that N-ethyl and bend-shaped aryl units mostly lowered the clearing transition temperatures
当 MIDA 硼酸盐与传统的单、双或三烷氧基苯基介晶连接时,高极性N-甲基亚氨基二乙酸 (MIDA) 单元会诱导液晶自组装。为了了解刚性介晶单元和N-取代基对介晶性质的影响,六系列带有N-乙基的 IDA 硼酸盐与经典的介晶芳基单元 ( Ph(n) k EIDA,n = 10 – 16, k = 1 – 3),或N-甲基与弯曲间-烷氧基苯基( Ph(n)间MIDA )、直链烷氧基-吡啶基 ( Pyr(n) 1 MIDA) 和-嘧啶基 ( Pym(n) 1 MIDA ) 分别制备。通过差示扫描量热法 (DSC)、偏光显微镜 (POM) 和 X 射线衍射 (WAXS, SAXS) 分析表明,N-乙基和弯曲形芳基单元主要降低了透明转变温度,降低了热分解和影响 SmA 相的偏好,而杂环单元有利于稳定的 SmA 相。
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