Sökning: "phosphorescence"

Visar resultat 11 - 15 av 20 avhandlingar innehållade ordet phosphorescence.

  1. 11. Photo-induced molecular processes and charge recombination reactions driven by non-adiabatic couplings

    Författare :Michael Stenrup; Åsa Larson; Horst Köppel; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Non-adiabatic processes; Photophysics; Photochemistry; Radiationless deactivation; Conical intersections; Five-membered aromatic heterocyclic compounds; Mutual neutralization; Dissociative recombination; kemisk fysik; Chemical Physics;

    Sammanfattning : This thesis is based on a number of theoretical studies of molecular processes in which non-adiabatic effects play a crucial role. The main part is devoted to the photophysics and photochemistry of five-membered aromatic heterocyclic compounds, with particular focus on furan and thiophene. LÄS MER

  3. 12. Computational Studies of Photobiological Keto-Enol Reactions and Chromophores

    Författare :Olle Falklöf; Bo Durbeej; Patrick Norman; Luis Manuel Frutos Gaite; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : This thesis presents computational chemistry studies of keto-enol reactions and chromophores of photobiological signicance.The rst part of the thesis is concerned with two protein-bound chromophores that, depending on the chemical conditions, can exist in a number of dierent ketonic and enolic forms. LÄS MER

  4. 13. Cubic Response Theory and the Electromagnetic Properties of Ground and Excited States

    Författare :Dan Jonsson; Aage E. Hansen; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : This thesis is devoted to the study of analytical response theory up to third order and its application to electromagnetic properties of ground and excited states. Computationally tractable expressions for the cubic response function for SCF and MCSCF wave functions have been derived and implemented in a computer code. LÄS MER

  5. 14. Carrier Dynamics in Single Luminescent Silicon Quantum Dots

    Författare :Fatemeh Sangghaleh; Jan Linnros; Canham Leigh; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Bulk silicon as an indirect bandgap semiconductor is a poor light emitter. In contrast, silicon nanocrystals (Si NCs) exhibit strong emission even at room temperature, discovered initially at 1990 for porous silicon by Leigh Canham. LÄS MER

  7. 15. Optical Diagnostics of Reactive Flows : Application of 3D emission tomography and laser-based methods

    Författare :David Sanned; Förbränningsfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Fysicumarkivet A:2023:Sanned;

    Sammanfattning : Nowadays, numerous specialized systems, ranging from electronics to energy production processes can be found both in science and industry. However due to their specialized nature they often exhibit high sensitivity to intrusive measurements, which can potentially perturb the sought-after characteristics or quantity and consequently compromise overall accuracy. LÄS MER