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Showing 1 to 19 of 19 for “"gold complexes"”.
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Modeling the chemical and photophysical properties of gold complexes.
Various gold complexes were computationally investigated, to probe their photophysical, geometric, and bonding properties. The geometry of AuI complexes (ground state singlet) is very sensitive to the electronic nature of the ligands: σ-donors gave a two-coordinate, linear shape; however, …
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Bioactive chloroquine-based ligands and their gold complexes as potential novel antimalarial agents
Chloroquine(CO)-derived 4-aminoquinolines have proven to be the most efficacious antimalarial drugs for both the treatment and prophylaxis of malaria. However, with the advent of drug resistance, their ability to treat the disease has been significantly hindered. Future research into the synthesis …
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Characterizations of Gold Complexes and Mechanism of its Usage in π-bond Activation Reactions
Research on homogeneous gold (I) catalyzed chemistry has made many exciting discoveries during the last few decades. The gold catalysts have been applied in many interesting chemical transformations, especially in π-bond activation reactions to initiate nucleophilic addition. But experimental …
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Cross Coupling of Alkenyl Gold Complexes with Alkyl Electrophiles and Nickel Catalyzed Hydroarylation of Alkenes
… is a cross-coupling reaction between alkenyl gold and alkyl triflates, resulting in the formation of a new C-C bond. While several strategies are known that enable α-selective cross-coupling of alkenyl gold complexes, we are able to achieve -selective cross-coupling by taking advantage of an …
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Synthesis and characterisation of palladium, platinum and gold complexes and their biological activity against oesophageal cancer cell lines
… the appropriate amine. A series of new metal complexes (Pd, Pt and Au) were obtained by coordination of the iminophosphine ligands in good yields. The complexes were characterised using the spectroscopic and analytical techniques mentioned above, with the exception of the palladium dichloride …
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Introduction of a Novel Family of Bitopic N-Heterocyclic Carbenes
… of bis-NHCs and their corresponding thiones and gold complexes. The unique structure of this family allows for the formation of bimetallic complexes, main-chain organometallic polymers, and supramolecular structures. These complexes allow for significant versatility in catalytic properties, …
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Synthesis of cyclometalated gold (III) complexesfunctionalized by alkynyl derivatives. Study of the interaction with DNA secondary structures.
… thesis explores the synthesis of cyclometalated gold(III) complexes functionalized by alkynyl ligands, as well as the study of the interaction of the studied complexes with DNA secondary structures. In this work, bidentate and tridentate ligands, in particular derived from both phenylpyridine and …
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Ni and Au Transition Metal Complexes in the Photocatalytic Co2 Reduction Reaction
… electron donor. This work focuses nickel and gold complexes as catalysts for photocatalytic CO¬2 reduction.
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Synthesis and Antimalarial evaluation of Gold Thiosemicarbazone Complexes and Polyamine-Thiosemicarbazone Dendrimers
… of thiosemicarbazones (TSCs) and their novel gold complexes and dendrimers as potential antimalarial agents. A series of TSCs were synthesised in one step using Schiff base chemistry. On the other hand pyrazoline analogues were obtained in two steps using both Mannich and Schiff base …
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Intermediates and Mechanisms of Gold(I)-Catalyzed Nucleophilic Addition Reactions
Generally, gold(I) complexes interact with pi-bonds of alkenes, alkynes and allenes to initiate nucleophilic addition reactions. As the key intermediates in these reactions, there has been recent interest in the synthesis and study of cationic, two-coordinate gold pi-hydrocarbon complexes. However, …
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Gold-catalyzed synthesis and functionalization of heteroarenes
… describes the results obtained from the study of gold-catalyzed synthesis or functionalization reactions or heteroarenes. The work is presented in four different chapters. The first chapter summarizes the most representative reactivity trends in the field of gold catalysis and serves as general …
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Photoelectron circular dichroism of anionic chiral metal complexes and deprotonated molecules
… investigated chiral anions are either chiral gold complexes, consisting of a neutral chiral molecule (fenchone, menthone, 3-hydroxytetrahydrofuran or alaninol) and an atomic gold anion, or deprotonated chiral molecules (alaninol, 1-indanol), which are (in most cases) deprotonated at the …
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1,2,3-triazoles as X-factor in gold(I) activation of challenging C-C triple bond transformations
… new reactivity of ligand-metal complexes was revealed.;A series of 1,2,3-triazole gold complexes were synthesized/characterized. This dissertation presents the results of research effort to explore the unique chemoselectivity and improved thermal stability that arises when …
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Synthesis and reactivity of Gold(ΙΙΙ) complexes with pincer ligands
… and reactivity of catalytically relevant gold(III) species supported by pincer ligands. The tridentate diphenylpyridine ligand was found to stabilise monomeric, terminal hydroxides of gold(III) which are reactive synthons for new metal complexes. Chapter 1 explores the chemistry of …
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Coinage metal complexes bearing mono-supported borohydride ligands based on scorpionate scaffolds
… a singly supported borohydride ligand to copper complexes in Chapter 3. The ligands utilised were based on known scorpionate scaffolds and were compared to their bis- and tris- counterparts. The coordination of the mono- ligands allows for the [BHn]− unit to come into closer proximity to the …
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Mechanistic Studies of pi-Activation Catalysis by Cationic Gold(I) and Brønsted-acid
<p>Soluble gold(I) complexes are highly efficient catalysts for the functionalization of C-C multiple bonds through the addition of carbon- or heteroatom-nucleophiles across π-bonds or cycloisomerizations of enynes and related π-systems. Mechanisms involving outer-sphere attack of a nucleophile on …
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Síntesis de indoles y carbazoles funcionalizados: catálisis con complejos de Au(III) y ácidos de Brønsted
Esta Tesis está centrada en el desarrollo de nuevas metodologías en Síntesis Orgánica utilizando ácidos de Brønsted y complejos de oro(III) como catalizadores. El hilo conductor es el núcleo indólico, cuya funcionalización selectiva continúa siendo un objetivo relevante en Química Orgánica. Bajo …
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Síntesis de nanoestruturas metálicas de oro y plata a partir de precursores organometálicos: Propiedades plasmónicas y catalíticas
… of the plasmonic and catalytic properties of gold or silver metal nanoparticles and gold-silver bimetallic nanoparticles, obtained through an organometallic approach, i.e. without the need of an external reducing agent and using organometallic compounds under mild reaction conditions and short …