Sökning: "chromophores"

Visar resultat 1 - 5 av 86 avhandlingar innehållade ordet chromophores.

1. 1. Multi-functional Chromophores

   Författare :Fredrik Johansson; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : As the push towards green energy become stronger, more efficient systems needs to be developed to compete with fossil fuel based systems. In modern Grätzel solar cells, most of the energy losses are inherited from the choice of chromophore and metal oxide surface. LÄS MER

3. 2. Shedding light on liquid chromophores using machine learning

   Författare :Eric Lindgren; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; machine learning; molecular dynamics; neutron scattering; machine learned force fields; chromophores;

   Sammanfattning : Chromophores are a class of molecules with widespread use in nature. Chlorophyll in plants contain chromophores making photosynthesis possible and the retinal molecules in our eyes have chromophores making the world around us visible. LÄS MER

4. 3. Light Control using Organometallic Chromophores

   Författare :Johan Henriksson; Patrick Norman; Olav Vahtras; Linköpings universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; organometallic chromophores; two-photon absorption; excited state absorption; excited state dipole moment; four-component formalism; clamping levels; spin-transition; Computational physics; Beräkningsfysik;

   Sammanfattning : The interaction between light and organometallic chromophores has been investigated theoretically in a strive for fast optical filters. The main emphasis is on two-photon absorption and excited state absorption as illustrated in the Jablonski diagram. We stress the need for relativistic calculations and have developed methods to address this issue. LÄS MER

5. 4. Formation of chromophores and leucochromophores during manufacturing of mechanical pulp

   Författare :Mattias Johansson; KTH; []
   Nyckelord :Chromophores; Kubelka-theory; Leucochromophores; Mechanical pulp; NMR spectroscopy; Reflectance spectroscopy; Spruce wood; UV-VIS spectroscopy;

   Sammanfattning : .... LÄS MER

7. 5. Quantum Chemical Studies of Protein-Bound Chromophores, UV-Light Induced DNA Damages, and Lignin Formation

   Författare :Bo Durbeej; Leif Eriksson; Tim Clark; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Quantum chemistry; quantum chemistry; calculations; density functional theory; excited states; photochemistry; chromophores; absorption spectra; bathochromic shift; isomerization; UV radiation; DNA damages; cycloaddition reactions; photoenzymic repair; electron transfer; lignin; polymerization; phenoxy radicals; dilignols; Kvantkemi; Quantum chemistry; Kvantkemi;

   Sammanfattning : Quantum chemical methods have been used to provide a better understanding of the photochemistry of astaxanthin and phytochromobilin; the photoenzymic repair of UV-light induced DNA damages; and the formation of lignin. The carotenoid astaxanthin (AXT) is responsible for the colouration of lobster shell. LÄS MER