Search for dissertations about: "anthracene"

Showing result 1 - 5 of 48 swedish dissertations containing the word anthracene.

  2. 1. Synthesis and Photophysical Characterization of Annihilator-Sensitizer Pairs for Triplet-Triplet Annihilation Based Photon Upconversion

    Author : Victor Gray; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Triplet-Triplet Annihilation; Photon Upconversion; Anthracene;

    Abstract : Transitioning to a future society, independent of fossil fuels, will denitely require the use of solar radiation for power and fuel production. Due to energy mismatch betweendevice absorption and the broad band irradiation provided by the sun there are severe limitations to how efficient devices for direct conversion of solar radiation can be. READ MORE

  4. 2. Photon Upconversion through Triplet-Triplet Annihilation: Towards Higher Efficiency and Solid State Applications

    Author : Damir Dzebo; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; solar energy conversion; triplet-triplet annihilation; energy transfer; fluorescence anisotropy; anti-stokes; photon upconversion; excited state; porphyrins; photochemistry; photophysics; delayed fluorescence; dendrimers; anthracene; oligomers; spectroscopy;

    Abstract : The sun is the only renewable energy source that can accommodate humanity’s energyneeds today and in the foreseeable future. The sunlight reaching the planet’s surfaceis filtrated through the atmosphere, reducing its UV-light intensity in the 300-400 nmrange, which indeed can be harmful to life as we know it in too large doses. READ MORE

  5. 3. Selective Retention of β-Carbolines and 7,12-Dimethylbenz[a]anthracene in the Brain : Role of Neuromelanin and Cytochrome P450 for Toxicity

    Author : Anna Östergren; Eva Brittebo; Nils Gunnar Lindquist; Anne-Lie Svensson; Hans Tjälve; Uppsala universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Toxicology; β-carboline; neuromelanin; norharman; harman; parkinsonism; Parkinson s disease; motoric impairment; behaviour; glia cells; substantia nigra; dopamine melanin; PC12 cells; ER stress; grp78; hsp90; cytochrome P450; CYP1A1; CYP1B1; blood-brain interfaces; 7; 12-dimethylbenz[a]anthracene; polycyclic aromatic hydrocarbon; endothelial cell; smooth muscle cell; bioactivation; Toxikologi; Toxicology; Toxikologi; Toxicology; toxikologi;

    Abstract : The ß-carbolines norharman and harman structurally resemble the synthetic compound 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) that is known for its ability to damage neuromelanin-containing dopaminergic neurons of the substantia nigra and thereby induce parkinsonism. MPTP is, however, not normally present in the environment whereas the ß-carbolines are present in cooked food and tobacco smoke. READ MORE

  6. 4. Photoinduced Electron and Energy Transfer in Π-Conjugated Systems

    Author : Melina Gilbert Gatty; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; fs spectroscopy; exciton coupling; conjugated porphyrin oligomers; ps spectroscopy; molecular wire; electron transfer; conformational analysis; self‒assembly; anthracene dendrimers; energy transfer; fluorescence anisotropy;

    Abstract : Photosynthesis is a fascinating process that provides food and oxygen. In this thesis, focus is on understanding and controlling the early processes of photosynthesis, namely photoinduced energy and electron transfer. READ MORE

  7. 5. Synthesis and binding studies of 9,10-disubstituted anthracene and dibenzobarrelene-based receptors for recognition of carbohydrates in water

    Author : Hans Grundberg; Centrum för analys och syntes; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Organisk kemi; 2- trimethylsilyl ethyl sulfide; diastereoselectivity; water; carbohydrates; recognition; biomimetic; Artificial; receptor; Organic chemistry;

    Abstract : Artificial, amfiphilic, and biomimetic receptors soluble in water were synthesized via attaching polar amino acids to hydrophobic back-bones possessing a surface suitable for hydrophobic interactions. The hydrophobic back-bones chosen in this thesis were anthracene and dibenzobarrelene structures. READ MORE