Supramolecular Photochemistry: Guest-Host Complexes and Supermolecules

超分子光化学：客主复合物和超分子

• 批准号: 9313102
• 负责人: Nicholas Turro
• 金额: $ 160.6万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-12-01 至 1999-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9313102&HistoricalAwards=false
• 关键词: Supramolecular; Photochemistry; Guest; Host; Complexes

9313102 Turro The photochemical behavior of supramolecular systems will be studied, in particular guest-host complexes and supermolecules. The guest systems include precursor ketones which produce triplet geminate radical pairs and metal complexes that serve as electron donor acceptor transfer pairs. The host systems include colloidal micellar aggregates, double helical DNA and porous molecular crystalline zeolites. The supermolecules include biradicals produced by photolysis of large ring cyclic ketones and donor-acceptor complexes separated in space at fixed distances by a DNA spacer. The objectives of the proposed research include the discovery of new knowledge which will allow the control of the chemistry of supramolecular systems that involve highly reactive species such as biradicals and micellized radical pairs, and the photoinduced electron transfer processes between metal complexes. %%% This grant from the Organic Dynamics Program supports the continuing work of Professor Nicholas J. Turro at Columbia University. Supramolecular chemistry has been defined as the chemistry beyond the molecule. Two important classes of supramolecules will be studied: guest-host complexes and supermolecules. Guest-host complexes consist of two or more molecules that are held together by attractive forces, rather than chemical bonds. The supermolecules to be studied can be viewed as a consisting of two or more subunits, connected by spacer units. The structure and dynamics of these supramolecules as well as reactive intermediates that will generated by photolysis will be studied. The results of this study will find applications to technological activities involving chemistry at interfaces, the characterization of materials possessing unusual properties, and to an understanding of the binding of small guest molecules to biomolecules. ***

9313102 Turro 将研究超分子系统的光化学行为，特别是客体复合物和超分子。客体系统包括产生三重态双自由基对的前体酮和充当电子供体受体转移对的金属络合物。主体系统包括胶态胶束聚集体、双螺旋DNA和多孔分子结晶沸石。超分子包括大环环酮光解产生的双自由基和通过DNA间隔物在空间中以固定距离分隔的供体-受体复合物。拟议研究的目标包括发现新知识，这些新知识将允许控制涉及高活性物质（例如双自由基和胶束自由基对）的超分子系统的化学，以及金属配合物之间的光诱导电子转移过程。 %%% 有机动力学计划的这笔赠款支持哥伦比亚大学 Nicholas J. Turro 教授的持续工作。超分子化学被定义为超越分子的化学。将研究两类重要的超分子：客体复合物和超分子。客体-主体复合物由两个或多个分子组成，这些分子通过吸引力而不是化学键结合在一起。要研究的超分子可以被视为由两个或多个通过间隔单元连接的亚基组成。将研究这些超分子以及光解产生的反应中间体的结构和动力学。这项研究的结果将应用于涉及界面化学的技术活动、具有不寻常特性的材料的表征以及对小客体分子与生物分子结合的理解。 ***