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首页> 外文学位 >NMR Studies into the Potential Interactions of Fullerene Carbon(60), with Tetraphenylporphyrin, Hydrogen(2)[TPP] and some of its Derivatives.
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NMR Studies into the Potential Interactions of Fullerene Carbon(60), with Tetraphenylporphyrin, Hydrogen(2)[TPP] and some of its Derivatives.

机译：NMR研究富勒烯碳（60）与四苯基卟啉，氢（2）[TPP]及其某些衍生物的潜在相互作用。

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The curved pi surface of fullerene, C60, shows a tendency to interact with other molecules, making it an interesting target for building supramolecular arrays. The interaction can be relative strong and may even exist in solutions, often leading to stable complexes. An important class of the macrocycles that interacts with fullerenes is the porphyrins. In our study, 1H NMR spectrometric studies have been done to gain information on the nature and the precise interaction site of fullerene 1, with tetraphenylporphyrin, H2[TPP] 2, and para-substituted tetraphenylporphyrins, H2[(p-X)4TPP], where X= CN and OCH3 in deuterated chlorobenzene-d5(CBZ) and toluene-d8. The porphyrin derivatives have been used to investigate any correlation in the interaction site due to changes in substituent. Relaxation rates of the pyrrole and phenyl hydrogen in the porphyrins were determined at temperatures of 288, 298 and 313 K for all the complexes in the presence and in the absence of fullerene, C60. To study solvent effects on interactions, Toluene-d8 and chlorobenzene-d5 solvents were used. Overall, our data indicated that C60 interacted with H2[TPP] at both the pyrrole and phenyl hydrogen sites however, these intermolecular interaction are not long-lasting in chlorobenzene-d 5.;The porphyrin derivatives showed that the substituents have an effect on which site is preferred for interaction. For the case of H2[(p-OCH 3)4TPP], that has an electron -donating group, both phenyl and pyrrole hydrogen sites interacted with C60, but preferably at the pyrrole hydrogen at all the three temperatures(283, 298, and 313 K). In the case of H2[(p-CN)4TPP] with an electron-withdrawing group CN, our data indicates that at lower temperature there is a noticeable, but slight preference for the interaction of C60 at pyrrole site but is quickly destroyed with an increase in temperature.
机译：富勒烯C60的弯曲pi表面显示出与其他分子相互作用的趋势，使其成为构建超分子阵列的有趣靶标。相互作用可能相对较强，甚至可能存在于溶液中，通常会导致稳定的配合物。与富勒烯相互作用的大环化合物的重要一类是卟啉。在我们的研究中，已完成1H NMR光谱研究，以获取有关富勒烯1与四苯基卟啉H2 [TPP] 2和对位取代的四苯基卟啉H2 [（pX）4TPP]的性质和精确相互作用位点的信息，其中X =氘代氯苯-d5（CBZ）和甲苯-d8中的CN和OCH3。卟啉衍生物已被用于研究由于取代基的变化而在相互作用位点的任何相关性。在存在和不存在富勒烯C60的情况下，对于所有配合物，都在288、298和313 K的温度下确定了卟啉中吡咯和苯基氢的弛豫速率。为了研究溶剂对相互作用的影响，使用了甲苯-d8和氯苯-d5溶剂。总体而言，我们的数据表明，C60在吡咯和苯基氢位点均与H2 [TPP]相互作用，但是，这些分子间相互作用在氯苯-d 5中并不是持久的；卟啉衍生物表明，取代基对首选网站进行互动。对于具有给电子基团的H2 [（p-OCH 3）4TPP]，苯基和吡咯氢位均与C60相互作用，但最好在所有三个温度下均在吡咯氢处（283、298和313 K）。在具有吸电子基团CN的H2 [（p-CN）4TPP]的情况下，我们的数据表明，在较低的温度下，吡咯位置上C60的相互作用明显（但略有偏爱），但很快被C60破坏。温度升高。

著录项

  • 作者

    Obondi, Christopher Otara.;

  • 作者单位

    East Carolina University.;

  • 授予单位 East Carolina University.;
  • 学科 Chemistry Physical.
  • 学位 M.S.
  • 年度 2011
  • 页码 78 p.
  • 总页数 78
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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