One-Dimensional Conjugated Materials

一维共轭材料

• 批准号: 0911540
• 负责人: Nancy Goroff
• 金额: $ 41.4万
• 依托单位: SUNY at Stony Brook
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-11-01 至 2013-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0911540&HistoricalAwards=false
• 关键词: Dimensional; Conjugated; Materials

The Organic and Macromolecular Chemistry Program in the Chemistry Division at the National Science Foundation supports Professor Nancy Goroff of SUNY Stony Brook who will seek effective routes from one-dimensional conjugated materials (e.g., polyynes) to graphitic nanostructures. The first experiments will center on the pseudo-1-dimensional polymer poly(diiododiacetylene), or PIDA. PIDA, recently prepared in the Goroff lab, is the first reported ordered polydiacetylene with only single-atom side groups. The simplicity of the PIDA structure allows the individual polymer strands to aggregate in much greater proximity than other well studied conjugated materials. The proposed research will include studies of PIDA co-crystals and aggregates, including conductivity, magnetoresistivity, optical absorptions and the chemistry that transforms PIDA into new materials. In addition, preliminary results suggest that aggregates of one-dimensional conjugated systems with limited side groups may be uniquely facile graphitization substrates. Professor Goroff will therefore examine aggregates of polyyne rods themselves, as sources of graphitic nano-wires. Polyynes containing 3-6 adjacent triple bonds and a diverse selection of side groups will be synthesized. The aggregation behavior of each of these polyynes will be examined, as well as their polymerization behavior. Methods will be sought for making well-defined ordered materials, with complete characterization of the products' structural, optical, electronic, and chemical properties.Research by Professor Goroff offers new methods for preparing conjugated materials with unique structures. Because of their electronic and optical properties, these materials will have applications as semi-conductors and as non-linear optical absorbers. In addition to the direct impact of the research, the proposed work will offer other benefits. A major component of this proposal involves collaborative research. The proposed projects bring together scientists from many different fields, each with different expertise and research focus, increasing communication across disciplinary boundaries. The proposed research also offers significant educational benefits. The graduate students and undergraduates supported by this grant will gain experience in modern organic synthesis, computational modeling, spectroscopy, and polymer characterization methods. Professor Goroff also participates in outreach activities, including activities in the local elementary and junior high schools. For example, she recently created, with a colleague, a hands-on workshop on the Chemistry of Perfumes, which was held for three classes of 21 students each as part of a local elementary school Career Lab Day, and will be repeated in the coming years. In addition, she has developed a freshman seminar course for 20 students on the Chemistry of Cooking. These activities are designed to attract students to chemistry who might otherwise not consider chemistry as a career.

美国国家科学基金会化学部的有机和高分子化学项目支持纽约州立大学斯托尼布鲁克的南希·戈罗夫教授，他将从一维共轭材料（例如，多炔）到石墨纳米结构。第一个实验将集中在伪一维聚合物聚（二碘二乙炔），或PIDA。最近在Goroff实验室制备的PIDA是第一个报道的仅具有单原子侧基的有序聚丁二炔。PIDA结构的简单性允许单个聚合物链比其他充分研究的共轭材料更接近地聚集。拟议的研究将包括PIDA共晶和聚集体的研究，包括电导率，磁阻，光学吸收和将PIDA转化为新材料的化学。此外，初步的结果表明，聚集体的一维共轭系统与有限的侧基可能是唯一容易石墨化基板。因此，戈罗夫教授将研究聚炔棒本身的聚集体，作为石墨纳米线的来源。将合成含有3-6个相邻三键和多种侧基的多炔。将检查这些多炔中的每一种的聚集行为，以及它们的聚合行为。我们将寻求制造定义明确的有序材料的方法，并对产物的结构、光学、电子和化学性质进行完整表征。Goroff教授的研究为制备具有独特结构的共轭材料提供了新方法。由于它们的电子和光学性质，这些材料将具有作为半导体和作为非线性光学吸收体的应用。除了研究的直接影响外，拟议的工作还将提供其他好处。这项建议的一个主要组成部分涉及合作研究。拟议的项目汇集了来自许多不同领域的科学家，每个人都有不同的专业知识和研究重点，增加了跨学科的沟通。拟议的研究还提供了显着的教育效益。研究生和本科生将获得现代有机合成，计算建模，光谱学和聚合物表征方法的经验。Goroff教授还参加外联活动，包括在当地小学和初中的活动。例如，她最近与一位同事创建了一个关于香水化学的实践研讨会，作为当地小学职业实验室日的一部分，为三个班的21名学生举办了研讨会，并将在未来几年重复。此外，她还为20名学生开发了一门关于烹饪化学的新生研讨会课程。这些活动的目的是吸引学生化学谁否则可能不考虑化学作为一种职业。