Sökning: "pyridine"

Visar resultat 31 - 35 av 84 avhandlingar innehållade ordet pyridine.

1. 31. Hydrogenation, Transfer Hydrogenation and Hydrogen Transfer Reactions Catalyzed by Iridium Complexes

   Författare :Xu Quan; Pher Andersson; Jonathan Williams; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Iridium catalyst; carbene; N; P - ligand; asymmetric hydrogenation; transfer hydrogenation; hydrogen transfer reaction; alkylation; olefin; ketone; amide; organisk kemi; Organic Chemistry;

   Sammanfattning : The work described in this thesis is focused on the development of new bidentate iridium complexes and their applications in the asymmetric reduction of olefins, ketones and imines. Three new types of iridium complexes were synthesized, which included pyridine derived chiral N,P-iridium complexes, achiral NHC complexes and chiral NHC-phosphine complexes. LÄS MER

3. 32. Molecular Interaction of Thin Film Photosensitive Organic Dyes on TiO2 Surfaces

   Författare :Shun Yu; Mats Göthelid; Chassé Thomas; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; photoelectron spectroscopy; X-ray absorption spectroscopy; organic semiconductor; oxides; adsorption; dye sensitization; electronic structure; charge transfer;

   Sammanfattning : The photosensitive molecule adsorption on titanium dioxide (TiO2) forms the so-called “dye sensitized TiO2” system, a typical organic/oxide heterojunction, which is of great interest in catalysis and energy applications, e.g. dye-sensitized solar cell (DSSC). Traditionally, the transition metal complex dyes are the focus of the study. LÄS MER

4. 33. Inhibitors Targeting Insulin-Regulated Aminopeptidase (IRAP) : Identification, Synthesis and Evaluation

   Författare :Karin Engen; Mats Larhed; Mikael Elofsson; Uppsala universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; compound screening; insulin-regulated aminopeptidase; IRAP; inhibitors; cognitive disorders; spiro-oxindole; quinazolinone; imidazopyridine; medicinal chemistry; structure-activity relationship; microwave heating; Medicinal Chemistry; Läkemedelskemi;

   Sammanfattning : Insulin-regulated aminopeptidase (IRAP) has emerged as a potential new therapeutic target for treatment of cognitive disorders. Inhibition of the enzymatic activity facilitates cognition in rodents. LÄS MER

5. 34. Tailing Charges on New Paths : Ultrafast intramolecular charge transfer in chromophores

   Författare :Belinda Pettersson Rimgard; Leif Hammarström; Oliver S. Wenger; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; intramolecular charge transfer; interligand electron transfer; electron transfer; proton transfer; concerted electron-proton transfer; Marcus inverted region; solvent; temperature; femtosecond spectroscopy; proton-coupled energy transfer; Chemistry with specialization in Physical Chemistry; Kemi med inriktning mot fysikalisk kemi;

   Sammanfattning : By tailing charges on their paths within a molecule, one can gain fundamental knowledge of their inherent reactivity. The charges, originally residing in their lowest energy configuration, can upon light absorption move across the system, or transfer in between them. LÄS MER

7. 35. Deciphering the Mechanistic Diversity of Proton-Coupled Electron Transfer Reactions

   Författare :Robin Tyburski; Leif Hammarström; Thomas Moore; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; PCET; Proton Coupled Electron Transfer;

   Sammanfattning : Proton coupled electron transfer is ubiquitous in biological and artificial reaction systems. Much has been done in order to describe the occurrence of such reactions. However, PCET reactivity is often very complex. For instance, there are multiple (stepwise and concerted) mechanistic pathways through which PCET may occur. LÄS MER