Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 18 of 18 for “"iron(II) complexes"”.
-
The femtosecond m-edge approach to the photodynamics of iron(II) complexes
Polypyridyl complexes of ruthenium(II) and iridium(III) have long been used as photosensitizers for photocatalysis and photovoltaic energy production. Low-spin iron(II) complexes with polypyridyl ligands also have d6 ground-state electron configuration and are strong absorbers of visible light, and …
-
Studies of oxime complexes
… gave monomeric, dimeric and polymeric metal complexes such as M(mnr)2 (M=Cu, Ni and Fe); Cu(OH)(mnr); M(dnr)(M=Ni or Cu). The complexes of type M(mnr)j , M(6-Memnr)2 and M(dnr) (M=Cu or Ni) form 1:2 adducts with pyridine. These complexes were investigated using spectroscopic, …
-
Metallkomplexe als Katalysatoren für selektive Olefinoligomerisierungen
… novel organic ligands and the respective metal complexes, to be applied for ethylene and propylene oligomerisation. A group of tridentate imino-ligands was synthesised, which includes the 2,6-bis(imino)pyridines 1-2, the 2,6-diacetyl-monoiminopyridine 3, the iminophosphines 16, and the …
-
Model complexes for active sites of diiron metalloproteins, dioxygen reactivity and water effects
(cont.) tetrairon(II) cubane complex was identified and structurally characterized. Chapter 4: Synthesis and Characterization of [Fe₂...CR)]³⁺ and [Fe₂...CR)]³⁺ Complexes with Carboxylate-Rich Metal Coordination Environment as Models for Diiron Centers in Oxygen-Dependent Non-Heme Enzymes. …
-
Studies of Some Co-Ordination Compounds of Iron and Cobalt
… study of the behaviour of tris 2-2' bipyridyl iron II cation in strongly acidic media. It is shown that the tris 2-2' bipyridyl iron II perchlorate is completely dissociated in concentrated hydrochloric acid to monoprotonated bipyridyl and chloro-ferrate. The pale blue solutions given by the …
-
Oxyanion reduction in a non-heme iron system
… to access both tautomeric forms of the ligand in iron(II) complexes. Moreover, the ability of each arm of the ligand to tautomerize independently was observed in an iron(II)-hydroxo complex that included both tautomeric forms. The secondary coordination sphere also displayed a propensity to engage …
-
Mechanistic Investigations Into The Thermal C-C Bond Forming Cyclization Of Metal Pyridine-Enamide Complexes And The Synthesis And Reactivity Of Cationic And Neutral Iron(Iv) Alkylidene Complexes
… of first row transition metal pyridine-enamide complexes has been synthesized. In the course of reactivity studies, it was discovered that heating a solution of the cobalt bis(pyridine-enamide) pyridine adduct resulted in intraligand CC coupling to form an indolamide ligand. Control experiments …
-
Probing the reaction coordinate of photoinduced spin-crossover with femtosecond M-edge XANES
… the ultrafast photophysics of transition metal complexes. Experimental spectra are interpreted with ligand field multiplet (LFM) simulations to extract information about the electronic structure of the metal center. General trends in the spectra of d0-d9 octahedral complexes with changing ligand …
-
Leveraging the Photochemistry of N-Nitrosamines for Their Aqueous Detection, and Development of a Novel Hemi-Iptycene for Porous Polymers
… for their widespread occurrence in the human environment. Consequently, the development of methods for their detection is an active area of research. Chapter 1 provides an introduction to the structure, reactivity, and synthetic applications of N-nitrosamines with an emphasis on alkyl …
-
Spin labile conducting metallopolymers : a new architecture for hybrid multifunctional materials
… and characterization of eight cationic iron(III) complexes containing these ligands with a selection of counteranions [(2.07) with: SCN- (2.08), PF6- (2.09), and CI04- (2.10); (2.19) with PF6 - (2.20); (5.06) with: cr (5.07), SeN- (5.08), PF6- (5.09), and CI04- (5.10)]. Spin-crossover is …
-
Chemistry and biological activity of iron quinoneoximic complexes
… 2-oxime (N-AcqoH) and their sodium and potassium complexes exist in the oximic form rather than the nitroso form. Nuclear magnetic resonance studies have also shown that in d,-DHSO solution hqoH,, 3-MehqoH, and 6-MehqoH} and their sodium complexes exist in one form only which is oximic in …
-
Reactions of metal complexes with Lewis bases and their utilisation in the selective filtration of smoke
… concerned with internal redox reactions of metal complexes and the application of such reactions in the selective filtration of tobacco smoke. The reactions of Fe(II), Fe(III) and Cu(II) quinoneoximic complexes and of some other complexes of these metals with Lewis bases (e.g. Ph3P and py) have …
-
Tripodal Inorganic 2-Pyridyl-phosphine Ligands and Unsymmetrical Analogues: Towards New Applications in Catalysis
… studies of P(6-R-2-py)3 (R = H, Me) to iron(II). Whereas P(2-py)3 readily forms the cationic sandwich complex [{P(2-py)3}2Fe]2+, P(6-Me-2-py)3 forms only half-sandwich complexes of the type [{P(6-Me-2-py)3}FeX2] (X = Cl, OTf). In addition to C3-symmetric ligands, a range of unsymmetrical …
-
Bio-inspired iron complexes featuring secondary coordination sphere interactions: Ligand design strategies and dioxygen reactivity
… promoting oxygen activation with bio-inspired iron complexes, our research group has designed new ligand frameworks featuring dynamic secondary coordination sphere interactions. The work reported herein describes the synthesis and derivatization of several ligand scaffolds and application of …
-
Amphiphilic Spin Crossover Complexes
… synthesis and characterization of amphiphilic iron(II) spin crossover complexes. The prime attention was on the self-assembly ability of the synthesized compounds and the influence of the supramolecular arrangement in the solid on the SCO behaviour. The used ligand system is based on Schiff …
-
Biomimetic carboxylate-bridged diiron complexes : from solution behavior to modeling the secondary coordination sphere
… Secondary Coordination Sphere of Non-heme Metal Complexes Chapter 1 is a mini-review that covers systematic studies on the effect of hydrogen bonding donors on the properties of metal complexes. Generalizing across different metals studied in biomimetic chemistry, the review allows for the …
-
Synthesis and Characterization of Metal-Organic Frameworks Organized by the Strong π...π Stacking 1,8-Naphthalimide Synthon
… strong π...π stacking unit. The reactions of iron(II), copper(II) and cadmium(II) tetrafluoroborate salts with two equivalents of Ltris yield [Fe(Ltris)2](BF4)2 (1), [Cd(Ltris)2](BF4)2 (2) and [Cu(Ltris)2](BF4)2 (3), respectively. Vapor diffusion crystallization yielded two pseudopolymorphs …