Now showing items 21-40 of 44

    • In situ detection of an unstable C,N-Au(III) chelate by 15N NMR methods 

      Lund, Jostein Johannes; Jonsson, Helgi Freyr; Fiksdahl, Anne (Peer reviewed; Journal article, 2022)
      Au(III)-NHC-oxazolyl complexes are prepared by oxidation and anion exchange of the corresponding Au(I)Cl-NHC-oxazolyl precursors, which are synthesized from appropriate imidazolium pre-ligands. As the Au(III) complexes are ...
    • Methyl 5-nitro-2-(phenylamino)pyridine-4-carboxylate 

      Hansen, Lars Kr.; Tjosas, Freddy; Fiksdahl, Anne (Journal article; Peer reviewed, 2006)
      In the crystal structure of the title compound, C13H11N3O4, there are two independent molecules in the asymmetric unit. In each case, the methylcarboxylate group is twisted by about 90 degrees relative to the rest of the ...
    • New Polyalkylated Imidazoles Tailored for Carbon Dioxide Capture 

      Evjen, Sigvart; Fiksdahl, Anne; Pinto, Diego Di Domenico; Knuutila, Hanna K (Journal article; Peer reviewed, 2018)
      Aqueous polyalkylated imidazoles have gained interest as potential CO2 capture solvents due to their high oxidative stability and low vapor pressures compared to traditional amines. In this work, 21 aqueous solutions of ...
    • Non-​Nucleophilic Electrolyte Based on Ionic Liquid and Magnesium Bis(diisopropyl)​amide for Rechargeable Magnesium-​Ion Batteries 

      Kallidanthiyil Chellappan, Lethesh; Kvello, Jannicke Hatlø; Tolchard, Julian R; Dahl, Paul Inge; Hanetho, Sidsel Meli; Berthelot, Romain; Fiksdahl, Anne; Jayasayee, Kaushik (Peer reviewed; Journal article, 2020)
      A non-nucleophilic electrolyte for rechargeable Mg-ion batteries is developed by the reaction of magnesium bis(diisopropyl)amide and 1-ethyl-3-methylimidazolium tetrachloroaluminate ionic liquid in tetrahydrofuran solvent. ...
    • Novel Au(I) Catalyzed Cycloaddition Reactions of Propargyl Acetals 

      Evjen, Sigvart (Master thesis, 2015)
      The goal of this master's thesis was to investigate novel gold(I) catalyzed cycloaddition reactions of nitrones and azides with propargyl acetals. Screening of the reactions was performed by testing reagents with electron ...
    • Predicting ionic liquid melting points using machine learning 

      Venkatraman, Vishwesh; Evjen, Sigvart; Knuutila, Hanna K; Fiksdahl, Anne; Alsberg, Bjørn Kåre (Journal article; Peer reviewed, 2018)
      The melting point (Tm) of an ionic liquid (IL) is of crucial importance in many applications. The Tm can vary considerably depending on the choice of the anion and cation. This study explores the use of various machine ...
    • Preparation of benzannulated spiroketals by gold(III) catalyzed spirocyclization of alkynyl diols 

      Jonsson, Helgi Freyr; Fiksdahl, Anne (Peer reviewed; Journal article, 2021)
      The first gold(III)-oxazoline catalysed intramolecular tandem dihydroalkoxylations of alkynyl diols to give benzannulated 5,6-spiroketal products is reported. The results showed that Au(III)-bisoxazoline (BOX) and ...
    • Preparation of Novel N-Heterocyclic Carbene Au(III)-complexes 

      Lund, Jostein (Master thesis, 2020)
      Sammendrag I dette prosjektet har to unike imidazolium N-benzyl, N-metylene - (C4-substituerte) -oxazoline imidazolium NHC-forløpere 7a (iPr-C4) og 7b (tBuC4) utarbeidet i tre trinn. En kondensasjon av de chirale amino ...
    • Rapid, comprehensive screening of ionic liquids towards sustainable applications 

      Venkatraman, Vishwesh; Evjen, Sigvart; Kallidanthiyil Chellappan, Lethesh; Raj, Jaganathan Joshua; Knuutila, Hanna K; Fiksdahl, Anne (Peer reviewed; Journal article, 2019)
      A computational screening strategy applied to 8 million synthetically diverse ionic liquids, demonstrates its value for sustainable solvent design. In contrast to previous studies which have largely focused on single ...
    • Rational design of mixed solvent and porous graphene-supported spinel oxide electrodes for high-rate and long cycle-life Mg batteries 

      Wang, Lu; Shao, Yuanlong; Jiang, Bo; Fiksdahl, Anne; Jayasayee, Kaushik (Peer reviewed; Journal article, 2019)
      The development of Mg batteries based on the interfacial charge storage mechanism, where the capacity originates from capacitive processes and the solvent-related interfacial reactions, could efficiently circumvent the ...
    • Screening analyses of pinosylvin stilbenes, resin acids and lignans in Norwegian conifers 

      Hovelstad, H; Leirset, Ingebjørg; Oyaas, K; Fiksdahl, Anne (Journal article; Peer reviewed, 2006)
      The content and distribution of stilbenes and resin acids in Scots pine (Pinus sylvestris) and spruce (Picea abies), sampled in central Norway, have been examined. The contents of pinosylvin stilbenes in pine heartwood/living ...
    • Studier av Au(III)-komplekser og reaksjoner 

      Solvi, Thomas Nordbø (Master thesis, 2020)
      Det tiltenkte målet med denne masteroppgave var å undersøke mulighetene for bruk av derivater av 1,4,8,11-tetraazasyklotetradecan (cyclam, 6) som ligander for Au(III)-komplekser. Grunnet lite givende resultater i det ...
    • Studies on Gold-Nitrone Chemistry 

      Jónsson, Helgi Freyr (Master thesis, 2017)
      The gold(I)-nitrone catalysed cyclotrimerization of diaryl propargyl acetals was studied. Gold(I)-nitrone and gold(I)/gold(III)-oxadiazole complexes were also synthesised.
    • Studies on gold-nitrone systems 

      Jonsson, Helgi Freyr; Fiksdahl, Anne (Journal article; Peer reviewed, 2019)
      Novel Au(I)​-​nitrone complexes with specific catalytic properties were prepd. Also, Au(I)​- and Au(III)​-​oxadiazole complexes were formed by a novel Au-​generated nitrile-​nitrone [3 + 2] cycloaddn., and the crystal ...
    • Symmetry of three-center, four-electron bonds 

      Holta, Ann Christin Reiersølmoen; Battaglia, Stefano; Øien-Ødegaard, Sigurd; Gupta, Arvind Kumar; Fiksdahl, Anne; Lindh, Roland; Erdélyi, Máté (Peer reviewed; Journal article, 2020)
      Three-center, four-electron bonds provide unusually strong interactions; however, their nature remains ununderstood. Investigations of the strength, symmetry and the covalent versus electrostatic character of three-center ...
    • Syntheses and Catalytic Studies of Axially Chiral Gold N-Heterocyclic Carbene Complexes 

      Øvrebø, Benedicte (Master thesis, 2021)
      Målet med dette masterprosjektet var å syntetisere aksialt kirale NHC-preligander med et benzimidazol-naftyl rammeverk, og koordinere disse til gull(I) og gull(III), etterfulgt av katalytisk testing av gullkompleksene. ...
    • Syntheses and Studies on New Dual Functionalized Zwitterions and Ionic Liquids - Imidazolium and 1,2,3-Triazolium based structures 

      Grøssereid, Ingrid (Master thesis, 2018)
      The purpose of this master's project was to synthesize new dual functionalized non-toxic imidazolium based zwitterions (ZIs), and ionic liquids (ILs) with high cellulose dissolution potential. As well as new 1,5-disubstituted ...
    • Synthesis and Antimicrobial Evaluation of Small Molecule Amphiphiles Derived from Amphiphilic Antimicrobial Natural Products 

      Bakka, Thomas Aleksander (Doctoral theses at NTNU;2017:239, Doctoral thesis, 2017)
      Development of antimicrobial agents that work through novel mechanisms is of importance for combating the steadily increasing proliferation of resistant bacteria. Infections caused by resistant bacteria have become an ...
    • Synthesis and design of imidazole-based solvent systems for CO2 capture 

      Evjen, Sigvart (Doctoral theses at NTNU;2019:199, Doctoral thesis, 2019)
      Global oppvarming forårsaket av menneskelige klimagassutslipp er den største utfordringen verden står ovenfor. Det er et enormt behov for videreutvikling av teknologien rettet mot reduksjon av disse utslippene. Fangst av ...
    • Synthesis of magnesium complexes of ionic liquids with highly coordinating anion 

      Kallidanthiyil Chellappan, Lethesh; Fiksdahl, Anne; Jayasayee, Kaushik; Øien-Ødegaard, Sigurd (Journal article; Peer reviewed, 2019)
      Magnesium(II) complexes, [Mg2+(hfac−)3][Cation+], were prepared as solids from hydrophobic hexafluoroacetylacetonate ionic liquids ([Cation+][hfac−] ILs) and Mg(Tf2N)2. 1-Butyl-3-methylimidazolium ([C4mim]), N-butylpyridinium ...