U. S. - Egypt International Collaboraton: Utilitarian Supramolecular nanoCellulosic Materials/OISE

技术：大分子和超分子化学以及纳米材料正在迅速发展；然而，正是在这些学科的交叉点上，创造新材料具有最有趣的潜力和广泛的吸引力。这项研究提交给美国埃及国际合作组织，由美国国家科学与工程基金会国际科学与工程办公室资助，将导致构建基于纤维素修饰的新聚合物材料，以及晶体工程、自组装以及聚合物和材料科学的工具。具体地说，PI将探索树枝状和非树枝状聚合物结构，基于(1)预先构建和精确设计的组件的配体-金属-配体组件，从而形成基于大分子的网络结构；以及(2)通过树枝、金属阳离子和纤维素材料的逻辑组合获得潜在的聚合物巨型结构，用于在连接到聚合物支架的基质中构建精确定位的组件。这种策略在光物理和电光材料中提供了优势，并且由于能够定制活性中心的性质(S)，在此提出了在聚合物阵列上构建含金属的聚合树枝状网络将导致嵌套纳米颗粒的分层区域。将评估嵌套的内部纳米颗粒的潜在表面保护和电子相互作用。还展望了该方法在形成多层聚合物表面中的应用。非技术性：该项目属于利用自然资源的新材料领域。促进对拟议工作的发现和理解将通过提供适当阶段的概念和技术科学挑战以及促进美国和埃及的合作努力，促进所有教育水平的学生培训和充实的结合，包括K-12、本科生、研究生、博士后和(国内和国际)访问科学家。这将促进学生的能力，同时灌输和培养批判性思维的特定元素，这是所有学科所必需的。通过直接支助和社区外联项目鼓励代表性不足的群体和少数群体的参与，还包括市中心的学校讲座和广泛促进科学和技术了解的K-12教师参与。此外，有关聚合物材料，特别是树枝状材料的科学信息通过首席调查员网站(www.endrimers.com)发布，目前该网站每月平均访问6,000-7,000次。

TECHNICAL:Macromolecular and supramolecular chemistries, along with nanomaterials are expanding rapidly; however, it is at the intersections of these disciplines where the creation of novel materials has the most interesting potential and a wide appeal. This research, submitted to the US Egypt International collaboration and funded by the NSF Office of International Science and Engineering, will lead to the construction of new polymeric materials based on cellulose modification and the tools of crystal engineering, self-assembly, and polymer and materials sciences. Specifically, the PIs will explore dendritic and non-dendritic polymeric architectures, based on (1) ligand-metal-ligand assemblies of preconstructed and precisely designed components resulting in macromolecular, network-based architectures; and (2) potential polymeric megastructures obtained by the logical combination of dendrons, metal cations, and cellulosic materials for the construction of precisely positioned components within matricies attached to polymeric scaffolds. Such strategies have afforded advantages in photophysical and electrooptical materials, and as a result of the ability to tailor the properties of the active site(s), it herein is proposed that the construction of metal-containing, polymerized, dendritic networks onto a polymeric array will result in layered regions of nested nanoparticles. The potential surface-protection and electronic interaction of the nested, internal nanoparticles will be evaluated. Application of this process to the formation of poly-layered polymeric surfaces is also envisioned. NONTECHNICAL: This project is in the area of new materials utilizing natural resources. Advancement of discovery and understanding of the proposed work will promote the integration of student training and enrichment, at all education levels, including K-12, undergraduate, graduate, post-doctoral and visiting scientists (national and international), by providing appropriately staged conceptual and technical scientific challenges, as well as foster US/Egyptian collaborative efforts. This will facilitate student competence while instilling and nurturing specific elements of critical thinking, requisite for all disciplines. Participation of underrepresented groups and minorities is encouraged through direct support and community outreach projects as well as includes inner-city school presentations and K-12 teacher involvement that broadly promote scientific and technical understanding. Additionally, scientific information about polymeric materials, and dendritic materials in particular, is promulgated through the principal investigator's website (www.dendrimers.com ), which currently averages 6,000-7,000 visits per month.