Gracia Ismael, Feringán Beatriz, Serrano José Luis, Termine Roberto, Golemme Attilio, Omenat Ana, Barberá Joaquín
Departamento de Química Orgánica, Instituto de Ciencia de Materiales de Aragón - CSIC, Universidad de Zaragoza, C/Pedro Cerbuna, 50009 Zaragoza (Spain).
Chemistry. 2015 Jan 12;21(3):1359-69. doi: 10.1002/chem.201404555. Epub 2014 Nov 17.
The synthesis and characterisation of a family of block codendrimers consisting of highly versatile mesogenic and carbazole-containing 2,2-bis(hydroxymethyl)propionic acid (bis-MPA) dendrons are reported. The liquid-crystal behaviour was investigated by means of differential scanning calorimetry, polarised-light optical microscopy and X-ray diffraction. Depending on the chemical structure of the constituent dendrons, the codendrimers show lamellar or columnar mesophases. On the basis of the experimental results, models both at the molecular level and in the mesophase are proposed. The physical properties of the block codendrimers derived from the presence of the carbazole moiety in their structure were investigated: photoluminescence in solution and in the mesophase, electrochemical behaviour and hole transport. Electrodeposition of carbazole dendrons afforded a globular supramolecular conformation in which the mesogenic molecular side plays a key role.
报道了由高度通用的介晶和含咔唑的2,2-双（羟甲基）丙酸（双-MPA）树枝状分子组成的一系列嵌段共聚物树枝状大分子的合成与表征。通过差示扫描量热法、偏光光学显微镜和X射线衍射研究了液晶行为。根据组成树枝状分子的化学结构，共聚物树枝状大分子呈现层状或柱状中间相。基于实验结果，提出了分子水平和中间相的模型。研究了结构中存在咔唑部分的嵌段共聚物树枝状大分子的物理性质：溶液和中间相中的光致发光、电化学行为和空穴传输。咔唑树枝状分子的电沉积产生了一种球状超分子构象，其中介晶分子侧起关键作用。
