tailieunhanh - Dendrimers IV Episode 3

Tham khảo tài liệu 'dendrimers iv episode 3', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Supramolecular Chemistry of Dendrimers Steven C. Zimmerman Laurence J. Lawless Department of Chemistry University of Illinois 600 South Mathews Ave Urbana Illinois 61801 USA E-mail sczimmer@ This review will focus on recent progress in supramolecular dendrimer chemistry. We have chosen to present several representative examples that illustrate the diverse ways in which dendrimers can be used to create supramolecular systems. The early focus is on host-gLiest chemistry where molecular recognition may occur within the dendrimer interior or at its surface. Interior binding may be directed for example by a specific group at the dendrimer core or it may be a nonspecific hydrophobic effect e. g. dendrimer as unimolecular micelle . Molecular recognition at the surface is distinguished by the large number of end-groups and the potential for multivalent interactions. The nanoscopic size and recognition abilities of dendrimers make them ideal building blocks for self-assembly and self-organization systems. The review will focus on ways in which dendrimers may be formed by self-assembly and ways in which preformed dendrimers may interact with one another. Two types of self-organizing systems will be illustrated liquid crvs-talline dendrimers and dendrimers organized at interfaces. Keywords. Dendrimer Complexation Binding Encapsulation Nanosphere Self-Assembly Hydrogen Bonding 1 Introduction . 96 Definitions and Scope . 96 2 Host-Guest Chemistry Involving Dendrimers. 98 Unique Structures for Surface and Internal Complexation. 98 Nonspecific Internal Binding . 98 Directed Internal Hydrogen Apolar Topological Surface 3 Self-Assembly of Concept and Definitions . 106 HydrogenBond Self-Assembly Using Pseudorotaxane Formation .107 Metal Mediated Self-Assembly .108 Topics in Current Chemistry . 217 dpringsr-Vsrlag Berlin

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