Efficient Synthesis of Soft Nanomaterials Through Transition Metal-Catalyzed Polymerization

通过过渡金属催化聚合高效合成软纳米材料

• 批准号: 0703988
• 负责人: Zhibin Guan
• 金额: $ 33万
• 依托单位: University of California-Irvine
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-04-15 至 2011-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0703988&HistoricalAwards=false
• 关键词: Efficient; Synthesis; Soft; Nanomaterials; Through

TECHNICAL SUMMARY:The objective of the proposed study is to develop highly efficient catalytic synthesis of soft nano-materials having unconventional structures and properties. Nanomaterials are actively investigated for various nanotechnology applications including catalysis, sensors, bio-imaging, drug delivery, and electronics. Among other systems, nanomaterials based on dendritic polymers have received much attention because they have globular shape in solution with molecular dimensions right in the nanometer range. Despite the elegance of many syntheses, the difficulty of preparing dendritic nanomaterials through step-wise synthesis and the limit of ultimate size for regular dendrimers warrant the search of more efficient methodologies for constructing dendritic nanostructures. This proposal details the plan to apply and combine various catalytic polymerization methods to efficiently synthesize soft nanomaterials. In the first part, the unique chain walking polymerization will be combined with atom transfer radical polymerization (ATRP) and ring-opening metathesis polymerization (ROMP) for designing unconventional linear-dendritic block copolymers. In the second part, simultaneous growth of dendritic nanoparticles on multi-sited chain walking catalysts and polymerization of dendronized macromonomer approach are proposed as efficient methods for constructing molecular nano-objects. The physical properties of the synthesized novel soft nanomaterials will be carefully investigated both in the PI's laboratory and through collaboration with other materials scientists in the United States and other countries.NON-TECHNICAL SUMMARY:This proposed research is aimed at developing catalytic polymerization methods for efficient preparation of soft functional nanomaterials that are important for various nanotechnology applications including catalysis, sensors, bio-imaging, drug delivery, and electronics. The synthesis will be achieved by efficient transition metal catalyzed polymerization of olefins that are easily accessible from petroleum industry. Successful development of high value nanomaterials from simple olefinic monomers will have significant impact on polyolefin industry. In addition, efficient methods for preparing complex and multifunctional soft nanomaterials may potentially accelerate many nanotechnological developments. The proposed multi-disciplinary research activity will provide excellent training for students in many areas including organic synthesis, organometallic, polymer synthesis and property studies, and nanoscience. This will provide great opportunities to train graduate and undergraduate students, especially for minority and women students.

技术摘要：拟议的研究的目的是开发具有非常规结构和特性的软纳米材料的高效催化合成。对纳米材料进行了各种纳米技术应用，包括催化，传感器，生物成像，药物输送和电子产品。在其他系统中，基于树突状聚合物的纳米材料引起了很多关注，因为它们具有溶液中的球形形状，分子尺寸在纳米范围内。尽管有许多合成的优雅，但难以通过逐步合成制备树突纳米材料，而常规树枝状聚合物的最终大小的极限值得搜索建造树突状纳米结构的更有效的方法。该建议详细介绍了应用和结合各种催化聚合方法的计划，以有效合成软纳米材料。在第一部分中，独特的链行走聚合将与原子转移自由基聚合（ATRP）和开环的元置聚合（ROMP）结合使用，用于设计非常规线性树枝状块共聚物。在第二部分中，提议树突状纳米颗粒对多链链行走催化剂的同时生长以及树突型宏观工艺方法的聚合是构造分子纳米对象的有效方法。 The physical properties of the synthesized novel soft nanomaterials will be carefully investigated both in the PI's laboratory and through collaboration with other materials scientists in the United States and other countries.NON-TECHNICAL SUMMARY:This proposed research is aimed at developing catalytic polymerization methods for efficient preparation of soft functional nanomaterials that are important for various nanotechnology applications including catalysis, sensors, bio-imaging, drug交付和电子产品。该合成将通过有效的过渡金属催化的烯烃聚合来实现，这些聚合可以从石油行业易于获得。从简单的烯烃单体中成功开发高价值的纳米材料将对聚烯烃产业产生重大影响。此外，制备复杂和多功能软纳米材料的有效方法可能会加速许多纳米技术的发展。拟议的多学科研究活动将为许多领域的学生提供出色的培训，包括有机合成，有机金属，聚合物合成和财产研究以及纳米科学。这将为培训毕业生和本科生，特别是对于少数民族和女学生提供良好的机会。