Liquid crystal naphthalene 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;# represents C≡C;
A, Z and Z′ are as follows: 1) A is Pyr> and
(a) Z is - and Z′ is O or COO or (b) Z is OCO and Z′ is - or O; 2) A is FPhF and (a) Z is - or O and Z′ is -, O or COO or (b) Z is OCO and Z′ is - or O; 3) A is FPh and (a) Z is - and Z′ is O or COO, (b) Z is O and Z′ is -, O or COO or (c) Z is OCO and Z′ is - or O; 4) A is
揭示了液晶萘化合物,其表示为以下公式(1):R-Z-A-#-NAP-Z′-R′ (1)
在公式(1)中,R是含有1至18个碳原子的烷基基团;R′是含有1至21个碳原子的烷基基团;NAP代表2,6-萘基团;#代表C≡C;A,Z和Z′如下:
1)A是Pyr>,并且(a)Z是-,Z′是O或COO,或者(b)Z是OCO,Z′是-或O;
2)A是FPhF,并且(a)Z是-或O,Z′是-,O或COO,或者(b)Z是OCO,Z′是-或O;
3)A是FPh,并且(a)Z是-,Z′是O或COO,或者(b)Z是O,Z′是-,O或COO,或者(c)Z是OCO,Z′是-或O;
4)A是
1,3-Dipolar cycloaddition reaction applied to synthesis of new unsymmetric liquid crystal compounds-based isoxazole
作者:André A. Vieira、Fernando R. Bryk、Gilmar Conte、Adailton J. Bortoluzzi、Hugo Gallardo
DOI:10.1016/j.tetlet.2008.12.021
日期:2009.2
ring compounds exhibited mesomorphism. Smectic C, smectic A, and nematic phases were observed by optical microscopy and DSC analysis. The yield of these reactions varied from moderate to excellent (47–93%). The structure of the rigid core was investigated by single crystal X-ray diffraction, which confirmed the regioselectivity of the [3+2] dipolar cycloaddition reaction.
在这项研究中,开发了一种区域选择性,简单和通用的铜(I)催化方法,用于制备基于非对称3,5-二取代异恶唑的一系列液晶。使用不同的取代的氯肟和苯基乙炔,进行了1,3-偶极环加成反应。还合成了在刚性核中包含异恶唑环和三键的第二系列。由Sonogashira交叉偶联从3-(4-溴苯基)-5-(4-(癸氧基)苯基)异恶唑制备新的液晶化合物。异恶唑环化合物的所有衍生物均表现出同构。通过光学显微镜和DSC分析观察到近晶相C,近晶相A和向列相。这些反应的产率从中度到优异(47-93%)不等。
Sonogashira Coupling Applied in the Synthesis of 1,2,4-Oxadiazole-Based Nonsymmetrical Liquid Crystals
作者:Hugo Gallardo、Rajendra Srivastava、Rodrigo Cristiano、André Vieira、Ricardo Neves Filho
DOI:10.1055/s-2008-1032156
日期:2008.2
A series of highly Ï-conjugated nonsymmetrical liquid crystals, based on the core 3,5-(disubstituted)-1,2,4-oxadiazole with a shape similar to a hockey stick, were successfully synthesized by convergent Sonogashira coupling reaction between the building blocks of aryl iodides and the corresponding terminal arylacetylenes, using 3-[4-(decyloxy)phenyl]-5-(haloaryl)-1,2,4-oxadiazoles or decyl 4-iodobenzoate (10) and terminal arylacetylenes. This versatile synthetic route yielded luminescent mesogens with smectic and nematic phases, typical of calamitic compounds.
以 3,5-(二取代)-1,2,4-噁二唑为核心,成功合成了一系列高度Ï-共轭的非对称液晶,其形状类似曲棍球棒、的 3-[4-(癸氧基)苯基]-5-(卤代芳基)-1,2,4-恶二唑或 4-碘苯甲酸癸酯 (10) 和末端芳基乙炔,通过芳基碘化物和相应末端芳基乙炔构建模块之间的收敛性 Sonogashira 偶联反应,成功合成了这种液晶。这种多用途的合成路线产生了具有钙钛矿化合物典型的熔融相和向列相的发光介质。
New 1,4‐Diaryl [1,2,3]‐Triazole Liquid Crystals Using a Click Reaction
作者:Gilmar Conte、Rodrigo Cristiano、Fernando Ely、Hugo Gallardo
DOI:10.1080/00397910500466470
日期:2006.3.1
Abstract New nonlinear compounds containing 1,4‐diaryl‐[1,2,3]‐triazole were prepared using a straightforward and efficient method for the regioselective synthesis of [1,2,3]‐triazoles. The methodology consists of a Cu(I)‐catalyzed 1,3‐dipolar cycloaddition of aryl azides to terminal arylacetylenes (click reaction). All compounds exhibited liquid‐crystalline profile.
摘要 采用一种直接有效的方法制备了含有 1,4-二芳基-[1,2,3]-三唑的新型非线性化合物,用于区域选择性合成 [1,2,3]-三唑。该方法包括 Cu(I) 催化的芳基叠氮化物与末端芳基乙炔的 1,3-偶极环加成反应(点击反应)。所有化合物都表现出液晶特征。
Luminescent 2,1,3-benzothiadiazole-based liquid crystalline compounds
作者:André A. Vieira、Rodrigo Cristiano、Adailton J. Bortoluzzi、Hugo Gallardo
DOI:10.1016/j.molstruc.2007.05.006
日期:2008.3
Abstract A series of fluorescent 2,1,3-benzothiadiazole-based liquid crystals bearing a π-extended aromatic portion through C C triple bond was synthesized and characterized. The X-ray structure of the rigid core was performed. The mesomorphism and optical profile were evaluated. These compounds showed preferentially smectic C and nematic phases whose stability increase with the elongation of the π-extended
摘要 合成并表征了一系列通过CC三键带有π-延伸芳香部分的荧光2,1,3-苯并噻二唑基液晶。进行了刚性核心的 X 射线结构。评估了介晶现象和光学分布。这些化合物显示出优先的近晶 C 和向列相,其稳定性随着 π 扩展芳族部分的伸长而增加。溶液中的紫外-可见光谱在 410 和 470 nm(e ∼ 6.0–9.0 × 104 mol−1 cm−1)附近显示出类似的吸收模式。化合物在溶液中表现出从绿色到红色的荧光(λ em max = 500 – 610 nm),并显示出较大的斯托克位移(82–141 nm)和中等荧光量子产率(ΦF = 0.23–0.37)。只有含有苯基哌嗪单元的化合物显示出非常低的量子产率 (ΦF = 0.10)。
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