Synthetic Methods to Access Aromatic Molecular Belts

化学部化学合成项目支持Ramesh Jasti教授的项目。 Jasti 教授是俄勒冈大学化学与生物化学系的教员。 正在进行的研究正在开发新的合成方法和策略，以获得各种芳香分子“带”，这些结构几十年来一直无法合成。这些目标因其结构、光物理和电子特性、超分子化学及其均匀合成碳纳米管（CNT）的潜力而受到人们的根本关注。该研究项目深深植根于有机合成和新合成方法，也与材料科学、生物学和物理学领域相关。 PI 选择具有挑战性的合成目标为研究生和本科生提供了有机合成策略、方法开发和反应机制方面的全面背景。此外，这些目标还为学生提供了与物理学家、工程师和理论家合作的机会，以测量、利用和理解新创造的纳米材料的物理特性。 具有径向定向π系统的分子几十年来一直受到化学家的赞赏，但最近经历了一次复兴，因为合成方法的新发展将以前主要是理论好奇心的东西变成了现在可以理解的结构。在这个项目中，Jasti 研究小组的目标是将合成边界推向这个有趣领域的下一个逻辑结构类别？芳香分子带。这些结构也是具有径向定向 pi 系统的分子，但它们与之前的结构的区别在于存在共轭但从不重合的上边缘和下边缘。与此类结构之前的旋转自由度相反，这些分子是刚性的且构象锁定的，这些特征预计将带来新的光电和主客体特性。此外，这些芳香带化合物被设想为碳纳米管化学气相沉积或狄尔斯-阿尔德生长的合适模板，从而有可能产生单手性碳纳米管。 PI 还与俄勒冈大学夏季科学项目合作，为俄勒冈州传统上缺乏服务的学生群体提供强调跨学科研究和实践科学的教育经验。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。

The Chemical Synthesis Program of the Chemistry Division supports the project by Professor Ramesh Jasti. Professor Jasti is a faculty member in the Department of Chemistry and Biochemistry at the University of Oregon. The research being pursued is developing new synthetic methods and strategies to access a wide array of aromatic molecular ?belts?, structures that have eluded synthesis for decades. These targets are of fundamental interest for their structural, photophysical and electronic properties, supramolecular chemistry, as well as their potential to lead to the uniform synthesis of carbon nanotubes (CNTs). This research program, deeply rooted in organic synthesis and new synthetic methods, is also relevant to the fields of materials science, biology, and physics. The PI?s choice of challenging synthetic targets provides graduate and undergraduate students with a thorough background in synthetic organic strategy, methodology development, and reaction mechanism. In addition, these targets provide students with opportunities to collaborate with physicists, engineers, and theorists to measure, utilize, and understand the physical properties of the newly created nanomaterials. Molecules with radially oriented pi-systems have been appreciated by chemists for decades, but have recently undergone a renaissance in that new developments in synthetic methodology have rendered what were previously mostly theoretical curiosities into now accessible structures. In this project, the Jasti research group aims to push the synthetic boundaries to the next logical class of structures in this intriguing field ? aromatic molecular belts. These structures are also molecules with radially oriented pi systems, but they are distinguished from their predecessors by the presence of upper and lower edges that are conjugated but never coincide. As opposed to the rotational freedom associated with previous structures in this class, these molecules are rigid and conformationally locked, features that are anticipated to lead to new optoelectronic and host-guest properties. In addition, these aromatic belt compounds are envisioned as suitable templates for chemical vapor deposition or Diels-Alder growth of carbon nanotubes, thus potentially leading to single chirality CNTs. The PI also partners with the UO Summer Science program to provide educational experiences that highlight interdisciplinary research and hands-on science to groups of students that are traditionally underserved in the state of Oregon.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.