نتایج جستجو برای: guest host interactions

تعداد نتایج: 589122  

2011
Christoph A Schalley

Supramolecular chemistry is a rapidly growing field, which has had remarkable impact on the life sciences on one hand and on materials sciences on the other. In the life sciences, the networks of noncovalent interactions between the constituents of cells, for example, have shifted into the current focus. Selfassembly, templation, self-sorting and multivalent binding all contribute to setting up...

2015
Yao-Rong Zheng Kogularamanan Suntharalingam Timothy C. Johnstone Stephen J. Lippard

This report presents a novel strategy that facilitates delivery of multiple, specific payloads of Pt(IV) prodrugs using a well-defined supramolecular system. This delivery system comprises a hexanuclear Pt(II) cage that can host four Pt(IV) prodrug guest molecules. Relying on host-guest interactions between adamantyl units tethered to the Pt(IV) molecules and the cage, four prodrugs could be en...

2015
Yao-Rong Zheng Kogularamanan Suntharalingam Timothy C. Johnstone Stephen J. Lippard

This report presents a novel strategy that facilitates delivery of multiple, specific payloads of Pt(IV) prodrugs using a well-defined supramolecular system. This delivery system comprises a hexanuclear Pt(II) cage that can host four Pt(IV) prodrug guest molecules. Relying on host–guest interactions between adamantyl units tethered to the Pt(IV) molecules and the cage, four prodrugs could be en...

2015
Raquel Mejia-Ariza Gavin A Kronig Jurriaan Huskens

Control over the assembly and disassembly of nanoparticles is pivotal for their use as drug delivery vehicles. Here, we aim to form supramolecular nanoparticles (SNPs) by combining advantages of the reversible assembly properties of SNPs using host-guest interactions and of a stimulus-responsive moiety. The SNPs are composed of a core of positively charged poly(ethylene imine) grafted with β-cy...

Journal: :Journal of the American Chemical Society 2005
Anna V Davis Kenneth N Raymond

Guest exchange in an M4L6 supramolecular host has been evaluated to determine whether host rupture is required for guest ingress and egress. Two mechanistic models were evaluated: one requiring partial dissociation of the host structure to create a portal for guest passage and one necessitating deformation of the host structure to create a dilated aperture for guest passage without host rupture...

2017
Mark T. M. Rood Silvia J. Spa Mick M. Welling Jan Bart ten Hove Danny M. van Willigen Tessa Buckle Aldrik H. Velders Fijs W. B. van Leeuwen

The use of mammalian cells for therapeutic applications is finding its way into modern medicine. However, modification or "training" of cells to make them suitable for a specific application remains complex. By envisioning a chemical toolbox that enables specific, but straight-forward and generic cellular functionalization, we investigated how membrane-receptor (pre)targeting could be combined ...

2008
Lars Fahl Lundegaard Sara Falconi Olga Degtyareva Shaun Evans Helen Maynard

Rb-IV is the stable high-pressure phase of rubidium between 16 and 21 GPa. The structure of Rb-IV has long been known to be complex, but it is only recently that it has been solved as being an incommensurate host-guest composite structure, comprising a tetragonal host framework containing chains of ”guest” atoms that form structures incommensurate with the host along their common caxis. While s...

2004
Lorin Gutman Jianshu Cao Timothy M. Swager Edwin L. Thomas

The orientational phase diagram and ordering of guest liquid crystalline (LC) rods in a host liquid crystalline polymer (LCP) matrix quenched below the glass transition is determined by field theory. Microscopic anisotropic interactions can align the LC rods to each other and also align LCP matrix side chains and the LC rods in the plane normal to the local LCP chain contour. Our numerical anal...

Journal: :Science 2002
Jerry L Atwood Leonard J Barbour Agoston Jerga

A known host-guest assembly, organized only by means of relatively weak dispersive forces, exhibits hitherto unappreciated thermal stability. The hexagonal close-packed arrangement of calix[4]arene contains lattice voids that can occlude small, highly volatile molecules. This host-guest system can be exploited to retain a range of freons, as well as methane, not only well above their normal boi...

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