Interactions self assemblies

Keywords Hydrophobic interactions Self-assembling Correlation volume... 

Figure 8 Ring-and-strings self-assembly filamentous ligand (17) combines with cyclic ligand (18) to form pseudorotaxane [Cu(17)(18)]+ upon treatment with Cu1. Multiple-interaction self-assembly (uni-/metal-mediated) combining (17), (18), Cu1 and Ru11 generates the catenane (19).

Two main types of multiple-interaction self-assembly have been demonstrated 25 (i) those involving the formation of two or more different types of coordinate bonds (metal-mediated or... 

Figure 9 Multiple-interaction self-assembly (multi-mediated) coordinate bond formation induces assembly of the metallocycle (20). Hydrophobic- and 7r-interactions, along with an entropy contribution, produce the...

The foniiation of 4, therefore, involved several different noncovalent interactions. The cyclization step was brought about by the formation of Pd—N coordinate bonds that is, by a metal-mediated process. The interlocking step involved n- and hydrophobie/hydrophilic-mediated processes, along with an entropic effect. Catenane 4 can. therefore, be considered an example of a multi-mediated,"" multiple-interaction self-assembly. Fujita referred to such processes as ""double-molecular recognition"" procedures, in which the two interlocking molecules bind each other in their cavities. 

Multiple-interaction self-assembly involves the formation of more than one type of interaction. Illustrated in Fig. 3b is a multiple-interaction process in which two types of coordinate bonds are formed (i.e., double subroutine self-assembly). Depicted in Fig. 3c is a multiple-interaction process in which one type of coordinate bond and one type of hydrogen bond are formed (i.e., a multiple molecular recognition process). Processes like that depicted in Fig. 3 b involve mediation by one class of interaction only, and can therefore be referred to as unmediated.Processes of the type depicted in Fig. 3c involve mediation by two different classes of interaction and are therefore refeiTed to as multimediated. ° ... 

Fig. 3 Classes of self-assembly The forination of metal helicates by (a) single-interaction self-assembly, (b) unime-diated multiple-interaction self-assembly, and (c) multimediated multiple-interaction self-assembly. The circles and diamonds represent metal ions with preferences to bind the semicircular and half-diamond binding sites, respectively, on the hybrid ligand strands.

Swiegers. G.F. Malefetse. T.J. Multiple-interaction self-assembly in coordination chemistry. J. Inch Phenom. Macrocycl. Chem. 2001. 40, 253-264. 

We have seen in this review that there are a vast array of physical methods that we can make use of in the design of nanocomposite polymer colloids. The classical approach of heterocoagulation can undergo a renaissance by exploring driving forces such as the hydrophobic effect and secondary molecular interactions. Self-assembly of complex anisotropic colloidal particles is already creating a whole new direction in the fabrication of supracolloidal structures. 

Keywords Heterocyclic Macrocycles Metal—ligand coordination Metallosupramolecular Noncovalent interactions Self-assembly Supramolecular chemistry Terpyridine... 

Self-assembled systems can be classified according to the diversity of interactions that they contain. Single-interaction self-assembly (sometimes referred to as single code self-assembly) refers to systems in which only one specific interaction is present (Figure 3.3(a)). For example, the palladium/bipyridyl square (3.1) in... 

Figure 3.1 is referred to as single-interaction self-assembly as it is assembled solely from Pd-N interactions that are all equivalent. The self-assembly of carboxylic acids in the solid state is also deemed to be single-interaction self-assembly as only OH 0 hydrogen bonds are present. 

Single/Multiple Interaction Self-Assembly Descriptive terms pertaining to the... 

Dendrimers that contain supramolecular interactions are mainly composed of metallodendrimers as well as with H-bonding and/or van der Waals interactions. Zimmerman et al. reported the synthesis of a family of dendrimers formed by the H-bond-mediated, self-assembly of six Frdchet-type polyether dendrons. Also, Percec et al. using hydrogen bond and van der Waal interactions self-assembled functionahzed polyether dendrons into cylindrical columnar or spherical assemblies that mimic certain types of viruses (Figure 4c). °... 

Hydrogen bonding Organic-organic interaction self assembly... 

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