Sökning: "host-guest complexation"

Visar resultat 1 - 5 av 8 avhandlingar innehållade orden host-guest complexation.

  1. 1. NMR Investigations of Host-Guest Complexes and Their Dynamic Properties

    Författare :Zdenek Tosner; Jozef Kowalewski; Josef Stepanek; Klaus Muller; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; supramolecular chemistry; host-guest complexes; non-covalent interactions; nuclear magnetic resonance; molecular motion; C-13 relaxation; deuterium NMR; dipolar recoupling; Physical chemistry; Fysikalisk kemi;

    Sammanfattning : This thesis discusses several different methods offered by solution and solid state nuclear magnetic resonance for investigation of host-guest complexes and their constituents. The presented methods were used especially (but not exclusively) to address rotational dynamics of the bound guest in different molecular systems. LÄS MER

  3. 2. Selectivity in Host-Guest Chemistry

    Författare :Gunnar Westman; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : This thesis describes host-guest complexes with the use of a biphenyl crown ether or cyclodextrin as host. Complexes between the biphenyl crown ether and salts form phenylalanine esters were studied. LÄS MER

  4. 3. Chloromethane Complexation by Cryptophanes : Host-Guest Chemistry Investigated by NMR and Quantum Chemical Calculations

    Författare :Zoltan Takacs; Jozef Kowalewski; Mikael Akke; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Host–guest complexes; inclusion phenomenon; cryptophanes; NMR; kinetics; activation energy; dipolar interaction; exchange; quantum chemical optimization; calculated chemical shifts; NOESY; cavity size; fysikalisk kemi; Physical Chemistry;

    Sammanfattning : Host–guest complexes are widely investigated because of their importance in many industrial applications. The investigation of their physico–chemical properties helps understanding the inclusion phenomenon. The hosts investigated in this work are cryptophane molecules possessing a hydrophobic cavity. LÄS MER

  5. 4. Synthesis and Studies of NADH Models: Stereoselective Reductions and Host-Guest Properties

    Författare :Ulrik Gran; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; synthesis; NADH model; host-guest complex; stereoselective reductions; macrocyclic; reducing agent;

    Sammanfattning : The aim of the project has been to synthesise macrocyclic NADH models and to study them as reducing agents and hosts. Three types of macrocyclic NADH models have been synthesised. They consist of the same subunits; a chiral unit, a nicotinamide unit and an aromatic spacer. LÄS MER

  7. 5. Exploring Molecular Interactions : Synthesis and Studies of Clip-Shaped Molecular Hosts

    Författare :Anjaneya Prasad Polavarapu; Helena Grennberg; Adolf Gogoll; Jerker Mårtensson; Uppsala universitet; []
    Nyckelord :Organic chemistry; Glycoluril clips; host-guest systems; supramolecular chemistry; complexation induced shifts; conformational restriction; NMR spectroscopy; fullerene binding; Organisk kemi;

    Sammanfattning : Molecular recognition via noncovalent interactions plays a key role in many biological processes such as antigen-antibody interactions, protein folding, the bonding and catalytic transformation of substrates by enzymes, etc. Amongst these noncovalent interactions, electrostatic interactions, hydrogen bonding, π-π interactions, and metal-to-ligand bonding are the most prominent. LÄS MER