Single-interaction self-assembly

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.

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... 

The Alexander approach can also be applied to discover useful information in melts, such as the block copolymer microphases of Fig. 1D. In this situation the density of chains tethered to the interface is not arbitrary but is dictated by the equilibrium condition of the self-assembly process. In a melt, the chains must fill space at constant density within a single microphase and, in the case of block copolymers, minimize contacts between unlike monomers. A sharp interface results in this limit. The interaction energy per chain can then be related to the energy of this interface and written rather simply as Fin, = ykT(N/Lg), where ykT is the interfacial energy per unit area, q is the number density of chain segments and the term in parentheses is the reciprocal of the number of chains per unit area [49, 50]. The total energy per chain is then ... 

The innate sensitivity of DNA-mediated CT to perturbations in the TT-stack has prompted us to employ this chemistry as a probe of stacking structure and dynamics. We have developed a new class of DNA-based diagnostic tools that diagnose DNA mutations such as single base-pair mismatches and lesions, analyze DNA-protein interactions, and probe the sequence-depen-dent dynamics and flexibility of DNA. These applications rely on electrochemical probing of CT in DNA films self-assembled on gold electrodes. 

D Souza, F., et al., Self-assembled single-walled carbon nanotube-.Zinc-porphyrin hybrids through ammonium ion-crown ether interaction Construction and electron transfer. Chemistry - A European Journal, 2007.13(29) p. 8277-8284. 

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