Charge Transport in the Mesomorphic Free-Radical Compound Bis(octakis(dodecyloxy)phthalocyaninato)lutetium(III)
Charge Transport in the Mesomorphic Free-Radical Compound Bis(octakis(dodecyloxy)phthalocyaninato)lutetium(III)
复制标题
介晶自由基化合物双(八(十二烷氧基)酞菁)镥(III)中的电荷传输
DOI：
10.1021/jp9722014
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发表时间：
1997
影响因子：
3.3
通讯作者：
K. Ohta
中科院分区：
文献类型：
--
作者：
A. M. V. D. Craats;J. Warman;H. Hasebe;and Rie Naito;K. Ohta
利用脉冲辐射分解时间分辨微波电导率技术（PR-TRMC）研究了自由基夹层配合物双（octakis(dodecyloxy) phthalocyaninto）lutetium(III), [(c120)8Pc]2Lu的电荷输运性质。该化合物在室温下析出的结晶固体（Kv）和196℃下的各向同性液体(I)之间表现出多晶性的热致性，具有Dx和Dh两个柱状液晶相。与先前使用PR-TRMC技术研究的所有其他盘状材料相比，发现载流子的迁移率在从Kv相过渡到第一柱状中间相Dx时显着增加。当进入高温六方柱状相Dh时，迁移率进一步显著提高。在90°C的Dx→Dh转变温度之上测定的柱内迁移率为0.17 × 10-4 m2/(V s)，这是柱状液晶材料所测定的最高迁移率。T…
We have used the pulse-radiolysis time-resolved microwave conductivity technique (PR-TRMC) to study the charge transport properties of the free-radical sandwich complex bis(octakis(dodecyloxy)phthalocyaninato)lutetium(III), [(C12O)8Pc]2Lu. This compound displays multimesomorphic thermotropic behavior with two columnar liquid crystalline phases, Dx and Dh, between the freshly precipitated crystalline solid at room temperature, Kv, and the isotropic liquid, I, at 196 °C. In contrast with all other discotic materials previously studied using the PR-TRMC technique, the mobility of charge carriers is found to increase markedly at the transition from the Kv phase to the first columnar mesophase, Dx. The mobility displays a further substantial increase on entering the higher temperature hexagonal columnar phase, Dh. The intracolumnar mobility determined just above the Dx → Dh transition temperature of 90 °C is 0.17 × 10-4 m2/(V s), which is the highest yet determined for a columnar liquid crystalline material. T...