Topologically trapped molecules

After the initial reports on dendritic molecules [19], proposals have been made for the construction and applications of guest-host systems made out of dendrimers [1,2,35]. The concept of topological trapping by core-shell molecules is based on... 

Sauvage et al. have elaborated special molecules with the topologies of catenated rings and knots [29]. The syntheses of these depend on metal coordination sites which direct the assembly of the components, but in general these catenanes and knots have few bonded connections. They are special because non-bonded sections are topologically trapped to coexist, thereby creating new opportunities for investigation of supramolecular relationships. A... 

The sign of connectivity index defines topology of oxidant molecules walk. Particles Z are traps or captures for the mentioned molecules, interrupting their trajectories owing to that polymer s structure is divided into a number of substructures and oxidant molecule walk is only allowed within the limits of such substructure up to meeting with Z particle. This... 

Maciejewski, M. Concepts of trapping topologically by shell molecules. J. Macromol. Sci. Chem. 1982, A17,... 

Because the layers of LCs transmit elastic energy, they can be used to do mechanical work, such as to assemble nanomaterials and induce topological defects in LCs. The feasibility of this scheme has been illustrated in the lab scale. For instance, linear and hexagonal arrays of nanoparticles were elastically trapped at various sites of smectic defects. Single wall carbon nanotubes could be organized into 2D parallel sheets between smectic layers due to specific interactions between n and n interactions between the hexagonal rings of the carbon nanotubes and the aromatic moieties of LC molecules [62, 67, 71]. 

ABSTRACT. A Lennard-Jones potential is used to derive for-mulaefor the potential of interaction between shell macro-molecules and gas atoms. Calculations are carried as far as thespherlcal symmetry approximation. The potential of interaction determines the stability of a shell topological compound. When the distance R between a shell molecule and a gas atom is equal the radius 1 of the outer shell, the potential is the highest and determines a barrier, which must be lower than an energy of the trapped / by the shell molecule / atom to be released. 

Figure 2. Topological isomers an atom A trapped inside a shell molecule M (left), and the atom located outside the molecule (right).

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