Search for dissertations about: "dinuclear"

Showing result 1 - 5 of 26 swedish dissertations containing the word dinuclear.

  1. 1. Dinuclear metal complexes modelling active sites of metallohydrolases

    Author : Martin Jarenmark; Kemisk fysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Bioinorganic chemistry; enzymes; hydrolases; models; dinuclear; heterodinuclear; phosphotriesterase; purple acid phophatase;

    Abstract : To study the active sites of dinuclear metallohydrolases new metal complexes that model these sites both in structure and function have been synthesized using two new phenol based dinucleating ligands, 2-(N-isopropyl-N-((2-pyridyl)methyl)aminomethyl)-6-(N-(carboxylmethyl)-N-((2-pyridyl)methyl)aminomethyl)-4-methylphenol (IPCPMP) and 2,6-Bis[N-(N-(carboxymethyl)-N-(pyridylmethyl)amine)methyl]-4-methylphenolate (BCPMP). Both ligands contain pyridyl, tertiary amine and carboxylate groups but in IPCPMP one carboxylate donor is exchanged for a non-coordinating group yielding an unsymmetric ligand while BCPMP is symmetric with identical sets of ligands on either side of the phenol group. READ MORE

  2. 2. Mechanistic Studies of Dinuclear Metalloenzymes - A Model Approach

    Author : Håkan Carlsson; Kemiska institutionen; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; models; Enzymes; bioinorganic chemistry; dinuclear; urease; nickel; zinc triphosphoesterase; Oorganisk kemi; Inorganic chemistry;

    Abstract : With the goal to study the mechanisms of dinuclear metalloenzymes, a new line of synthetic and computational models were prepared and studied. Mixed imidazole and carboxylate multidentate complexes were synthesized to better simulate carboxylate-rich ligand environments. READ MORE

  3. 3. Quantum Chemical Cluster Modeling of Enzymatic Reactions

    Author : Rongzhen Liao; Fahmi Himo; Robert Deeth; Stockholms universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; cluster approach; density functional theory; B3LYP; enzyme; mechanism; dinuclear; trinuclear; zinc; tungsten; hydrolysis; decarboxylation; formaldehyde oxidation; hydration; methyl transfer; Quantum chemistry; Kvantkemi; Organic Chemistry; organisk kemi;

    Abstract : The Quantum chemical cluster approach has been shown to be quite powerful and efficient in the modeling of enzyme active sites and reaction mechanisms. In this thesis, the reaction mechanisms of several enzymes have been investigated using the hybrid density functional B3LYP. READ MORE

  4. 4. Dependence of the coordination number of silver(I) in crystalline halogenoargentates(I) on the nature of the cation

    Author : Göran Helgesson; Chalmers University of Technology; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; clusters; idioargentates I ; halogenocuprates I ; tetraphenylarsonium; crown ethers; tetranuclear; chloroargentates I ; bromoargentates I ; mononuclear; Halogenoargentates I ; heteronuclear; tetraethylammonium; dinuclear; cryptates; tetramethylammonium; crystal structure; silver I ;

    Abstract : .... READ MORE

  5. 5. Dinuclear Manganese Complexes for Artificial Photosynthesis : Synthesis and Properties

    Author : Magnus Anderlund; Björn Åkermark; William H. Armstrong; Stockholms universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Crystal Structure; Artificial photosynthesis; Manganese complex; Organic chemistry; Organisk kemi;

    Abstract : This thesis deals with the synthesis and characterisation of a series of dinuclear manganese complexes. Their ability to donate electrons to photo-generated ruthenium(III) has been investigated in flash photolysis experiments followed by EPR-spectroscopy. READ MORE