Plasma Bioscience Research Center, Department of Electrical and Biological Physics, Kwangwoon University, Seoul, Korea.
PLoS One. 2013 Jul 9;8(7):e68970. doi: 10.1371/journal.pone.0068970. Print 2013.
In this paper, we have examined the conductivity and interaction studies of ammonium and imidazolium based ionic liquids (ILs) with the newly synthesised low bandgap polymer (Poly(2-heptadecyl-4-vinylthieno[3,4-d]thiazole) (PHVTT)). Use of low bandgap polymers is the most suitable way to harvest a broader spectrum of solar radiations for solar cells. But, still there is lack of most efficient low bandgap polymer. In order to solve this problem, we have synthesised a new low bandgap polymer and investigated its interaction with the ILs to enhance its conductivity. ILs may undergo almost unlimited structural variations; these structural variations have attracted extensive attention in polymer studies. The aim of present work is to illustrate the state of art progress of implementing the interaction of ILs (protic and aprotic ILs) with newly synthesised low bandgap polymer. In addition to this, our UV-Vis spectroscopy, confocal Raman spectroscopy and FT-IR spectroscopy results have revealed that all studied ILs (tributylmethylammonium methyl sulfate ([N1444][MeSO4] from ammonium family) and 1-methylimidazolium chloride ([Mim]Cl, and 1-butyl-3-methylimidazolium chloride ([Bmim]Cl from imidazolium family) have potential to interact with polymer. Our semi empirical calculation with help of Hyperchem 7 shows that protic IL ([Mim]Cl) interacts strongly with the low bandgap polymer through the H-bonding. Further, protic ILs shows enhanced conductivity than aprotic ILs in association with low bandgap polymer. This study provides the combined effect of low bandgap polymer and ILs that may generate many theoretical and experimental opportunities.
在本文中，我们研究了铵和咪唑鎓基离子液体（ILs）与新合成的低带隙聚合物（聚（2-十七烷基-4-乙烯基噻吩[3,4-d]噻唑）（PHVTT））的电导率和相互作用研究。使用低带隙聚合物是收集太阳能电池更广泛光谱太阳能的最有效方法。但是，仍然缺乏最有效的低带隙聚合物。为了解决这个问题，我们合成了一种新的低带隙聚合物，并研究了其与 ILs 的相互作用以提高其电导率。ILs 可以进行几乎无限的结构变化；这些结构变化引起了聚合物研究的广泛关注。目前工作的目的是说明实施 ILs（质子和非质子 ILs）与新合成的低带隙聚合物相互作用的最新进展。除此之外，我们的 UV-Vis 光谱、共焦拉曼光谱和 FT-IR 光谱结果表明，所有研究的 ILs（铵家族的三丁基甲基铵甲基硫酸盐 ([N1444][MeSO4]) 和 1-甲基咪唑鎓氯化物 ([Mim]Cl，以及咪唑鎓家族的 1-丁基-3-甲基咪唑鎓氯化物 ([Bmim]Cl）都有可能与聚合物相互作用。我们借助 Hyperchem 7 的半经验计算表明，质子 IL ([Mim]Cl) 通过氢键与低带隙聚合物强烈相互作用。此外，与低带隙聚合物结合时，质子 ILs 比非质子 ILs 具有更高的电导率。这项研究提供了低带隙聚合物和 ILs 的综合效应，可能会产生许多理论和实验机会。
