Host-guest property

Pedersen, Cram and Lehn received the Nobel Prize in Chemistry in 1987 for their work on synthetic macrocyclic compounds. In their Nobel lectures, Pedersen (1988) described the discovery of crown ethers, Cram (1988) and Lehn (1988) the further development of work on new synthetic macrocycles and their host-guest properties. 

Some Unique Features of Dendrimers Based upon Self-Assembly and Host-Guest Properties... 

Baars et al. recently investigated the host-guest properties of polypropylene imine) dendrimers functionalized with tris-3,4,5-tri(tetraethyleneoxy)benzoyl units (Figure 16.15) [191]. These hosts are highly soluble in a broad range of solvents, from apolar solvents such as toluene to polar aqueous media. 

We will focus now on two series of tetra-bridged phosphorylated cavitands, which are of importance in regards to their potential host-guest properties and therefore as elements for the design of supramolecular systems. These are the phosphate derivatives, and the P-phenyl phosphonate or thio-phosphonate compounds, which have been particularly investigated in our group. 

Owing to their larger size, coordination solids incorporating cluster cores in place of individual metal centers can be expected to have an expanded framework structure. This is of particular interest for 3D solids, wherein the expansion could produce a highly porous framework with host-guest properties similar to those of zeolites. 

Tucci EC, Renslo AR, Rudkevich DM, Rebek J Jr. Nanoscale container structures and their host-guest properties. Angewandte Chemie, Internat. Ed. 2000 39 1076-1079. 

Wheel-and-axle organic diols are host systems well known in the solid state. The introduction of a metal into the wheel-and-axle molecular frame opens the way for the design of materials with multiple functions, joining chemical and structural properties of the metal centre with the steric and supramolecular attitudes of the organic matrix. This chapter treats the rationalization of host-guest properties of wheel-and-axle inorganic diols. 

Raymond < / al. have reported the formation and host-guest properties of supramolecular tetrahedral assemblies of... 

Fleterogeneous catalytic activity was one of the first proposed and demonstrated host-guest properties of MOFs, with subsequent research providing a range of different catalytic activities across a diverse array of framework systems. Most notable among these systems are cases in which catalysis arises due to chemical activation at specific surface binding sites. 

We have defined the terms carcerand, carceplex, hemicarcerand, and hemicarceplex The formation of carcer-ands an carceplexes has led to some important information regarding templation by neutral molecules Similarly, the properties of hemicarcerands and hemicarceplexes has led to some interesting host-guest properties, including the storage of highly reactive species such as cyclobutadiene or benzyne... 

Sun. S.-S. Lees, A.J. Self-assembly triangular and square rhenium(I) tricarbonyl complexes A comprehensive study of their preparation, electrochemistry, photophysics, photochemistry, and host-guest properties. J. Am. Chem. Soc. 2000, 722 (37). 8956-8967. 

Ranganathan, D. Haridas, V. Sundari. C.S. Balasubra-manian, D. Madhusudanan. K.P. Roy. R. Karle, I.L. Design, synthesis, crystal stmcture, and host-guest properties of polymethylene-bridged cystine-based cyclobis-amides A facile entry to hydrogen-bonded peptide nanotubes. J. Org. Chem. 1999, 64 (25), 9230-9240. 

Muller, A. Krickemeyer. E. Dillinger, S. Bogge, H. Stammler, A. As4Mo6V7039(S04)" A species with an unusual structure and a model for the different host-guest properties of poly-vanadates and -molybdates. J. Chem. 

Dendrimer offers excellent host-guest property, which leads to the noncovalent interactions for the encapsnlation of drug molecules (Figure 15.4). The core is hydrophobic, while the shell is hydrophilic in dendrimers. This analogous micelle-like behavior makes it a promising carrier for drugs and... 

Starburst dendrimers have received considerable attention in the area of heterogeneous catalyst synthesis in the last decade. Although Tomalia et al. and Bosman et al. originally discovered these hyperbranched macromolecules and their host-guest properties in the mid-1980s. Crooks and coworkers were the first to demonstrate the ability of poly(amidoamine) (PAMAM) starburst dendrimers to act as metal nanoparticle stabilizers that could potentially aid in the synthesis of supported metal catalysts. The benchmark work of Crooks et al. and subsequent literature reports have underscored the advantages of successfully utilizing PAMAM dendrimer-nanocomposite precursors over conventional catalyst preparation methods. 

Since their host-guest properties were discovered, PAMAM dendrimers have been used in the synthesis of dendrimer-metal nanocomposites containing various metals, including Cu, Pt, Pd, Au, Ag, Rh, Ru, Ni, Fe, Mn, Co, and Sn. - The first... 

Figure 3.51 The octahedral capsule 3.31 displays many remarkable host guest properties.

Metal-organic frameworks are largely used for their host-guest properties, such as gas adsorption, anion exchange and chemical separation, much like zeolites. The following section will deal with some of these aspects individually. 

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