Adsorption studies of divalent, dinuclear coordination complexes as molecular spacers on SWCNTs.
Adsorption studies of divalent, dinuclear coordination complexes as molecular spacers on SWCNTs.
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二价、双核配位配合物作为单壁碳纳米管上的分子间隔物的吸附研究。
DOI：
10.1039/c5cp05419b
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
J. C. Poler
中科院分区：
文献类型：
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作者：
Jeffrey R. Alston;D. J. Banks;C. McNeill;James B. Mitchell;L. Popov;I. Shcherbakov;J. C. Poler
为了提高纳米结构碳材料的电能存储能力，需要粒子间间隔策略来保持纳米粒子之间的离子可及表面积。本文比较了不同类型的二价、双核配位络合物，它们既对单壁碳纳米管具有很强的吸附能力，又具有保持电化学活性的分子间隔物性质。我们发现，与我们以前对双核Ru络合物的研究相比，一种新型的双核锌肼配合物在非常高的负载量下以离子对的形式结合，而不会引起显著的聚集。这些结论得到了电导率和色散稳定性数据的支持。此外，由于锌是一种富含地球的金属，这些络合物可以作为组份用于可持续的储能材料。给出了结合动力学和结合平衡数据。吸附等温线的模拟最符合BET模型。Kinetics数据支持独立的绑定模型。初步的电容和膜电阻数据与在凝聚薄膜中作为单壁碳纳米管之间的分子间隔物的络合物相一致。
In order to enhance the electrical energy storage capabilities of nanostructured carbon materials, inter-particle spacer strategies are needed to maintain ion-accessible surface area between the nanoparticles. This paper presents a comparison between different classes of divalent, dinuclear coordination complexes which both show strong adsorption to SWCNTs and have molecular spacer properties that maintain electrochemical activity. We find that a novel, dinuclear zinc hydrazone complex binds as an ion-pair at very high loading while not inducing significant aggregation as compared to our previously studies of dinuclear ruthenium complexes. These conclusions are supported by conductivity and dispersion stability data. Moreover, since zinc is an earth abundant metal, these complexes can be used as components in sustainable energy storage materials. Binding kinetics and binding equilibrium data are presented. Modeling of the adsorption isotherm is best fit with the BET model. Kinetics data support an independent binding model. Preliminary capacitance and membrane resistance data are consistent with the complexes acting as molecular spacers between the SWCNTs in a condensed thin film.