1,2,3-Triazole lamellar liquid crystal and its noncovalent palladium complex dimer: structure, mesomorphism and self-assembly properties
1,2,3-Triazole lamellar liquid crystal and its noncovalent palladium complex dimer: structure, mesomorphism and self-assembly properties
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1,2,3-三唑层状液晶及其非共价钯配合物二聚体：结构、介晶性和自组装性能
DOI：
10.1080/02678292.2021.1944358
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Ping Hu
中科院分区：
文献类型：
--
作者：
Meihao Xia;Yao Chen;Ziran Chen;Wenhao Yu;Haomin Cheng;Chun Feng;Hailiang Ni;Biqin Wang;Ke-qing Zhao;Ping Hu
利用内炔与叠氮化合物之间的无催化剂点击反应成功地合成了1，4-二取代1H-1，2，3-三唑。在均相混合溶剂中回流点击产物和氯化钯形成非共价氯化钯配合物PdCl_2-L_2，通过对模板化合物的X-射线晶体学分析，表明配合物以反-反异构取向为主。这两种化合物均表现出典型的扇形层状中间相结构。由于Pd-N配位键连接较弱，PdCl_2-L_2是一种单致液晶，其液晶温度范围较窄，热稳定性相对较差。此外，两者都可以在石墨衬底表面自组装成条状纳米结构。
1,4-disubstituted 1H-1,2,3-triazolesLwas successfully synthesised using a catalyst-free click reaction between an internal alkyne and an azide compound. Refluxing click productLand palladium chloride in a homogeneous mixed solvent led to the formation of the non-covalent palladium chloride complexPdCl2-L2, which was characterised by X-ray crystallographic analysis of the template compound, indicating that the complex adopts predominant trans-trans isomeric orientations. The two compounds showed a typical fan-shaped texture of the lamellar mesophase. Because of weak Pd-N coordination bond connections,PdCl2-L2is a monotropic liquid crystal with a narrower mesomorphic temperature range and relatively poorer thermal stability than ligandL. Furthermore, bothLand the complex dimer can self-assemble into strip-shaped nanostructures on the oriented graphite substrate surface.