Sökning: "Sonogashira coupling"

Visar resultat 1 - 5 av 13 avhandlingar innehållade orden Sonogashira coupling.

  1. 1. Palladium catalysis in the synthesis of covalently linked diporphyrins

    Författare :Thomas Ljungdahl; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; porphyrin; systems; copper-fre sonogashira; donor-bridge-acceptor; sonogashira; cross-coupling; alkynylation; palladium;

    Sammanfattning : .... LÄS MER

  3. 2. Study the Influence of Quantum Interference on the Electrical Conductance and Thermoelectric Properties of Molecular Junctions : Synthesis and Thermoelectricity

    Författare :Hailiang Xu; NanoLund: Centre for Nanoscience; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Molecular junctions; charge transport; electronic conductance; thermoelectricity; destructive quantum interference; acetylene molecules; Sonogashira coupling; Ti-mediated transformation; porphyrin; MacDonald [2 2] approach; [3 1] method;

    Sammanfattning : This thesis mainly describes our efforts towards the study of the quantum interference of electronic conductance and thermoelectric properties in molecular junctions. Chapter 1 introduces the concepts of the charge transport in single-molecule junctions, include the electrical conductivity and thermopower which are the main parameters to assess the efficiency of the single-molecule junctions. LÄS MER

  4. 3. Towards the Development of Photoswitchable β-Hairpin Mimetics

    Författare :Máté Erdélyi; Adolf Gogoll; Anders Karlén; John A. Robinson; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Organic chemistry; β-hairpin; peptidomimetics; Sonogashira; NMR; photochemistry; microwave; peptide; palladium; Organisk kemi; Organic chemistry; Organisk kemi;

    Sammanfattning : Peptide secondary structure mimetics are important tools in medicinal chemistry, as they provide analogues of endogeneous peptides with new physicochemical and pharmacological properties. The β-hairpin motif has been shown to be involved in numerous physiological processes, among others in regulation of eucariotic gene transcription. LÄS MER

  5. 4. Synthesis and optical characterization of optical power limiting platinum(II) acetylides

    Författare :Marcus Carlsson; Bertil Eliasson; Jerker Mårtensson; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Platinum acetylides; nonlinear absorption; optical power limiting; Sonogashira coupling; solution gels; thiophene; Organic chemistry; Organisk kemi;

    Sammanfattning : Interactions between light and a molecule can result in reversible or irreversible changes in properties of both the light and the molecule. Of the many known interactions, nonlinear absorption is a process in which an intense light signal, for instance from a laser, can be moderated. LÄS MER

  7. 5. Organic and organometallic compounds for nonlinear absorption of light

    Författare :Per Lind; Bertil Eliasson; Adolf Gogoll; Umeå universitet; []
    Nyckelord :Organic chemistry; Nonlinear absorption; thiophene; platinum complexes; optical limiting; sonogashira coupling reactions; molecular orbital calculations; Organisk kemi; organisk kemi; Organic Chemistry;

    Sammanfattning : The demand for protection of eyes and various types of optical sensors from laser-beam pulses has resulted in the search for optical limiting devices that have the property of being transparent at low intensity of light (normal light), but non-transparent towards high intensity (laser) light. This type of protection may be obtained by using an organic material that displays nonlinear optical (NLO) properties. LÄS MER