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光导性液晶衍生物的6-oxoverdazyl的衍生物
Aleksandra Jankowiak1, Damian Pociecha, Jacek Szczytko
1Organic Materials Research Group, Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, USA.
Journal of the American Chemical Society
|January 28, 2012
概括
新的trifenyl-6-oxoverdazyl激素形成柱状液晶相. 这些有机激素表现出有趣的电子和磁性质,显示出电子应用的潜力.
科学领域:
- 有机化学 有机化学
- 材料科学 材料科学 材料科学
- 物理化学 物理化学
背景情况:
- 绿基是含有的异环化合物,具有独特的电子和磁性特性.
- 液晶 (LC) 是一种物质状态,其属性处于常规液体和固体晶体之间,在显示器和传感器中找到应用.
- 功能化有机分子对于开发具有定制性质的先进材料至关重要.
研究的目的:
- 合成和表征新的1,3,5-triphenyl-6-oxoverdazyl基因,其基硫链长度不同.
- 为了研究这些新型激素的液晶行为,光学,电化学和磁性质.
- 探索这些材料在有机电子,特别是光伏应用中的潜力.
主要方法:
- 1,3,5-triphenyl-6-oxoverdazyl基因与n = 6,8,10个基硫基组的合成.
- 不同扫描热度计 (DSC) 和偏光光学显微镜 (POM) 用于相位行为分析.
- 紫外线-Vis光谱学和循环电压测量用于光学和电化学表征.
- 孔移动性测量和磁化研究,用于电子和磁性属性评估.
主要成果:
- 合成的基因在60°C以下表现出一个单一的柱状矩形 (Col(r)) 中相.
- 在可见区域观察到广泛的吸收波段 (最大在540和610nm).
- 氧化电位表明容易氧化和还原 (E(1/2) ((0/+1) = +0.99 V,E(1/2) ((0/-1) = -0.45 V与SCE).
- 测量了1的1.52 × 10−3 cm2 V−1 s−1的孔移动性和0.06 ± 0.01 eV的激活能量[8].
- 在200 K以上,观察到近乎理想的偏磁性行为和在低温下较弱的反铁磁性相互作用1[8].
结论:
- 研究的三-6-oxoverdazyl激素自组装成有序的柱状液晶相.
- 这些材料具有有利的光学和电化学特性,可用于有机电子设备.
- 观察到的电子和磁性行为表明它们在自旋电子应用和分子磁铁中的实用性.
相关概念视频
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