Insights into Magneto-Optics of Helical Conjugated Polymers.
Insights into Magneto-Optics of Helical Conjugated Polymers.
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DOI：
10.1021/jacs.8b03777
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发表时间：
2018-05-23
影响因子：
15
通讯作者：
Swager TM
中科院分区：
文献类型：
--
作者：
Wang P;Jeon I;Lin Z;Peeks MD;Savagatrup S;Kooi SE;Van Voorhis T;Swager TM
具有磁光（MO）特性的材料已经实现了关键的光纤应用和高灵敏度的磁场传感器。虽然传统的MO材料本质上是无机的，但基于有机半导体聚合物的新一代MO材料可以增加器件架构、制造选项和灵活机械的多功能性。然而，半导体聚合物中MO活性的起源还远未被理解。本文报道了在手性螺旋聚-3-（烷基砜）噻吩（P3 AST）中观察到的高分子轨道活性，证实了一种新的产生巨法拉第效应的设计，其Verdet常数在532 nm处高达（7.63±0.78）×104 deg T−1 m−1。我们已经确定，费尔德常数的符号和它的大小与在测量波长的聚合物的螺旋度有关。P3 AST的法拉第旋转和螺旋构象受到热退火的调制，DFT和MD模拟进一步证实了这一点.我们的研究结果表明，螺旋聚合物表现出增强的费尔德常数，并扩大了以前的设计空间聚噻吩MO材料，被认为是有限的高度规则的层状结构。本文的结构性质研究为基于半导体有机聚合物的下一代MO材料的设计提供了见解。
Materials with magneto-optic (MO) properties have enabled critical fiber-optic applications and highly sensitive magnetic field sensors. While traditional MO materials are inorganic in nature, new generations of MO materials based on organic semi-conducting polymers could allow increased versatility for device architectures, manufacturing options, and flexible mechanics. However, the origin of MO activity in semiconducting polymers is far from understood. In this paper, we report high MO activity observed in a chiral helical poly-3-(alkylsulfone)thiophene (P3AST), which confirms a new design for the creation of giant Faraday effect with Verdet constants up to (7.63±0.78)×104 deg T−1 m−1 at 532 nm. We have determined that the sign of the Verdet constant and its magnitude are related to the helicity of the polymer at the measured wavelength. The Faraday rotation and the helical conformation of P3AST are modulated by thermal annealing, which is further supported by DFT and MD simulations. Our results demonstrate that helical polymers exhibit enhanced Verdet constants, and expand the previous design space for polythiophene MO materials that was thought to be limited to highly regular lamellar structures. The structure property studies herein provide insights for the design of next generation MO materials based upon semiconducting organic polymers.
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影响因子：
4.4
作者：
BECKE, AD
通讯作者：
BECKE, AD
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影响因子：
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通讯作者：
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作者：
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Barbarella, Giovanna
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2.3
作者：
Araoka, Fumito;Abe, Masahiro;Takezoe, Hideo
通讯作者：
Takezoe, Hideo
影响因子：
5.5
作者：
Dubus, S;Marceau, V;Leclerc, M
通讯作者：
Leclerc, M