Host-guest Complexation
Host-guest Complexation - Related Videos
10:39
Heterogeneous Removal of Water-Soluble Ruthenium Olefin Metathesis Catalyst from Aqueous Media Via Host-Guest Interaction
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Cited by 3 •
2018
A removable water-soluble N-heterocyclic carbene (NHC) ligand in aqueous media via host-guest interaction has been developed. We demonstrated representative olefin metathesis reactions in water as well as in dichloromethane. Via either host-guest interaction or extraction, the residual ruthenium (Ru) catalyst was as low as 0.14 ppm after the reaction.
06:34
In Situ Monitoring of Diffusion of Guest Molecules in Porous Media Using Electron Paramagnetic Resonance Imaging
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Cited by 2 •
2016
A protocol for the in situ monitoring of the diffusion of guest molecules in porous media using electron paramagnetic resonance (EPR) imaging is presented.
13:51
The MultiBac Protein Complex Production Platform at the EMBL
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Cited by 30 •
2013
Protein complexes catalyze key cellular functions. Detailed functional and structural characterization of many essential complexes requires recombinant production. MultiBac is a baculovirus/insect cell system particularly tailored for expressing eukaryotic proteins and their complexes. MultiBac was implemented as an open-access platform, and standard operating procedures developed to maximize its utility.
02:41
Protein Complex Assembly
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2020
Proteins can form homomeric complexes with another unit of the same protein or heteromeric complexes with different types. Most protein complexes self-assemble spontaneously via ordered pathways, while some proteins need assembly factors that guide their proper assembly. Despite the crowded intracellular environment, proteins usually interact with their correct partners and form functional complexes. Many viruses self-assemble into a fully functional unit using the infected host cell to...
04:15
Extracting Host Cell Lysate from Infected Host Cells Cultured in a Permeable Membrane System
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2025
This video demonstrates a permeable membrane insert system to investigate the impact of bacterial toxins on host cells in a controlled and isolated manner. This approach allows for the selective exposure of the cells to the toxins while maintaining a physical separation that mimics the natural host-pathogen interaction.
FAQs
Selectivity largely comes from complementarity between the guest and the host’s cavity, cleft, or recognition site. A guest with a suitable size and shape can make more stabilizing contacts than a poorly matched species. This structural matching helps explain why related molecules may bind differently and allows chemists to connect molecular architecture with recognition behavior.
Hydrogen bonding, electrostatic attraction, hydrophobic effects, and van der Waals interactions collectively stabilize the assembly without requiring a conventional covalent bond. Their combined contribution gives the host and guest enough affinity to associate while preserving reversibility. This balance is chemically useful because the guest can bind, function within the complex, and later be released.
Reversible binding allows a guest to associate with and separate from a host without permanently changing the molecules through a conventional covalent linkage. The resulting assembly can therefore respond to molecular recognition conditions and support temporary sequestration or release. This feature differentiates host-guest systems from approaches that rely on permanent chemical attachment.
A host can be designed to recognize a guest through complementary size, shape, and noncovalent interactions. When the selected guest occupies the recognition site, formation of the assembly provides a molecular basis for distinguishing it from other species. This principle supports sensing strategies in which selective association is linked to the function of a designed chemical system.
Chemists apply host-guest complexation to molecular recognition, sensing, catalysis, drug delivery, and controlled release. In each case, the host provides a defined environment for a guest, while reversible association helps regulate the guest’s presence or availability. The same chemistry also supports the design of supramolecular materials whose behavior depends on organized molecular assembly.
Host-guest assemblies show how molecular structure can control affinity and function without relying on conventional covalent bonding. In supramolecular materials, this relationship helps guide the organization of molecular components. In drug delivery and controlled release, reversible association provides a basis for temporarily holding a guest and enabling its release when the assembly no longer remains intact.