Schematic illustration three-dimensional network

The cooperative, infinite chains and cycles formed by O-H 0 hydrogen bonds in the a-cyclodextrin hydrates are a characteristic structural motif [109]. As with the simpler carbohydrate crystal structures described in Part II, Chapter 13, the hydrogen bonds can be traced from donor to acceptor in the cyclodextrin hydrate crystal structures. Networks of O-H 0-H 0-H interactions are observed in which the distribution of hydrogen bonds follows patterns with two characteristic motifs. One are the "infinite chains which run through the whole crystal lattice, and the others are the loops or cyclically closed patterns (a special case of the "infinite chains). As in the small molecule hydrates, such as a-maltose monohydrate, the chains and cycles are interconnected at the water molecules to form the complex three-dimensional networks illustrated schematically in Fig. 18.5, with some sections shown in more detail in Fig. 18.7 a, b, c. 

Figure 2. Schematic illustration of three-dimensional network formed by binding of affinity surfactant to multi-binding site biomolecule and subsequent hydrophobic aggregation of surfactant tail groups.

Figure 99. Schematic illustration of three-dimensional porphyrin network in Pd(TPyP) Cd(NO3)2 8.6H20 in which porphyrins are represented as squares and cadmium ions as circles. Solvent molecules are omitted for clarity. Reprinted with permission from Abrahams, B. F. Hoskins, B. F. Robsin, R. /. Amer. Chem. Soc. 1991, / / 3, 3606. 1991 American Chemical Society.

The three-dimensional crosslinked network which is formed upon curing (Scheme 16.27) consists of two main segments the polyacrylate chain and the polymer, to which some acrylate groups are attached. This schematic picture clearly illustrates the methods by which the properties of the network can be adjusted the polyacrylate chain, the side groups, the number of crosslinks, and the acrylate-functional polymer. 

Fig. 12 a Schematic illustration of preparation of PS/RGO composite with an ordered three-dimensional segregated network the electrical conductivities of PS/RGO composites with b the segregated network and c the random netwrak. Reproduced with permission [54] from Copyrights (2013) The Royal Society of Chemistry... 

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