Sökning: "donor-bridge-acceptor"

Visar resultat 1 - 5 av 10 avhandlingar innehållade ordet donor-bridge-acceptor.

  1. 1. Intramolecular processes in porphyrin-based donor-bridge-acceptor systems

    Författare :Karin Pettersson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Donor-bridge-acceptor system; paramagnetic species; spectroscopy; porphyrin; super-exchange electron transfer; sequential electron transfer;

    Sammanfattning : .... LÄS MER

  3. 2. Energy and Electron Transfer in Porphyrin-Based Donor--Bridge--Acceptor Systems

    Författare :Kristine Kilså; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; electron transfer; electronic coupling; donor--bridge--acceptor systems; quantum mechanical calculations; enhanced intersystem crossing; ligand and solvent effects; bridge mediation; energy transfer; porphyrin;

    Sammanfattning : The photophysical properties of supramolecular donor--bridge--acceptor systems have been investigated by spectroscopic and quantum mechanical methods. The systems consist of porphyrin donor and acceptor moieties linked by bridging chromophores of varying excitation energy, and are shown to be geometrically well-defined in terms of length and rotational conformation. LÄS MER

  4. 3. Tuning of Energy and Electron Transfer Rates in Donor-Bridge-Acceptor Systems

    Författare :Karin Pettersson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; electron transfer; electronic coupling; paramagnetic species; superexchange; Donor-bridge-acceptor system; spectroscopy.; porphyrin; sequential electron transfer; Förster energy transfer; energy transfer;

    Sammanfattning : The intramolecular processes of Donor-Bridge-Acceptor (D-B-A) systems have been investigated by spectroscopic methods. The systems consist of porphyrin donors and acceptors linked by oligo-p-phenyleneethynylene bridges. LÄS MER

  5. 4. Triplet Excitation Energy Transfer in Donor-Bridge-Acceptor Systems: Experimental and Theoretical Investigations

    Författare :Mattias P Eng; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; self-assembled monolayer; density functional theory; triplet excitation energy transfer; gold porphyrin; electron transfer; spectroscopy; superexchange; electronic coupling;

    Sammanfattning : This thesis is a contribution to the understanding of bridge mediation of electron exchange processes in Donor-Bridge-Acceptor (D-B-A) systems. The field of research is relevant for the development and optimization of dye-sensitized solar cells, artificial photosynthesis, and the possible future development of molecular electronic devices. LÄS MER

  7. 5. 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