Dissertations / Theses on the topic 'Pyrazole Based Ligand'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 20 dissertations / theses for your research on the topic 'Pyrazole Based Ligand.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
Ainooson, Michael Kojo. "Binuclear late transition metal complexes with pyrazole based compartmental ligands: Scaffolds for cooperative organometallic transformations." Doctoral thesis, Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2014. http://hdl.handle.net/11858/00-1735-0000-0023-98FC-E.
Full textOlson, Michael David. "Pyrazolyl based ligands in transition metal complexes." Thesis, University of British Columbia, 1989. http://hdl.handle.net/2429/27610.
Full textScience, Faculty of
Chemistry, Department of
Graduate
Movahed, Hazel Haghighi. "Coordination chemistry and crystal engineering with new polydentate pyrazole-based ligands." Thesis, University of Sheffield, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.522425.
Full textORBISAGLIA, SERENA. "From pyrazole- to imidazole-based N-donor Ligands: Coordination Chemistry and Applications of New Late Transition Metals Complexes with Scorpionates, Poly(pyrazolyl)alkanes and NHCs." Doctoral thesis, Università degli Studi di Camerino, 2014. http://hdl.handle.net/11581/401839.
Full textPerlepe, Panagiota. "Magnetic and Electrically Conductive Two-Dimensional Coordination Networks Based on the Redox-Active Pyrazine Ligand." Thesis, Bordeaux, 2019. http://www.theses.fr/2019BORD0227.
Full textThis thesis is devoted to the synthesis and physical characterization of new two-dimensional (2D) coordination polymers that present high-temperature magnetic order and/or electrical conductivity. The simultaneous implementation of these two properties within a single material represents a formidable challenge in the synthesis of multifunctional materials for next-generation data processing and storage. Our approach to synthesize such systems involves the use of the redox-active organic bridging ligand, pyrazine, and reducing transition metals. Chapter I presents some general aspects of redox-activity, charge delocalization and mixed-valency that are crucial for the understanding of the experimental results. The different approaches for the synthesis of conducting and magnetic coordination polymers are also described. Chapter II provides a general view on the fundamental concepts regarding electrical conductivity, magnetism and X-ray absorption spectroscopy. Chapter III deals with the synthesis and extensive physical characterization of the coordination solid CrCl2(pyrazine)2, which exhibits both magnetic order and electrical conductivity. Chapters IV and V are devoted to the study of the effect of the anionic co-ligands and metal centers, respectively, in the family of MX2(pyrazine)2 (M = Cr, Ti, V and X = OSO2CH3, Br and I) coordination solids. Finally, Chapter VI illustrates how post-synthetic redox chemistry can result in an impressive enhancement of the magnetic order temperature in 2D layered pyrazine-based materials
Paul, Tobias [Verfasser], and Nicolai [Akademischer Betreuer] Burzlaff. "Ligands and Coordination Chemistry Based on Vinyl and Alkynyl Substituted Pyrazoles / Tobias Paul. Gutachter: Nicolai Burzlaff." Erlangen : Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 2015. http://d-nb.info/1076120520/34.
Full textFeng, Min. "Multiple physical properties in the lanthanide complexes involving 2,6-di(pyrazol-1-yl)- pyridine-based tetrathiafulvalene ligands." Thesis, Rennes 1, 2015. http://www.theses.fr/2015REN1S113.
Full textIn this manuscript, the Chapter one introduces the target multifunctional materials, including the necessary knowledge of different selected physical properties such as magnetism, luminescence, and conductivity, as well as some of the previous contributions by our and other groups. In Chapter two, the tetrathiafulvalene-based ligand with two dpp acceptors (L1 and L2) (TTF = tetrathiafulvalene, dpp = 2,6-di(pyrazol-1-yl)-pyridine) and the corresponding lanthanide complexes are presented including the synthesis and physical characterizations: single crystal structure, cyclic voltammetry, absorption spectra that rationalized by TD-DFT calculations, emission spectra, and DC and AC magnetic measurements. The complexes Eu, Yb, and Er are emissive. In the Chapter three, a TTF-based ligand with two hetero coordinating sites L7 and its two Dy(III) complexes (C7-1 and C7-2) were presented, which show multi-relaxation SMM behavior
Solanki, Nayan Kumar. "The copper chemistry of substituted 2,6-Bis pyrazolyl pyridines and schiff base ligands." Thesis, University of Cambridge, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.621813.
Full textRoberts, Thomas David. "Novel ligands based on 2,6-di(1H-pyrazol-5-yl)pyridine derivatives and applications in spin crossover and transfer hydrogenation complexes." Thesis, University of Leeds, 2015. http://etheses.whiterose.ac.uk/9418/.
Full textAinooson, Michael Kojo [Verfasser], Franc [Akademischer Betreuer] Meyer, Philipp [Akademischer Betreuer] Vana, and Dietmar [Akademischer Betreuer] Stalke. "Binuclear late transition metal complexes with pyrazole based compartmental ligands: Scaffolds for cooperative organometallic transformations / Michael Kojo Ainooson. Gutachter: Philipp Vana ; Dietmar Stalke. Betreuer: Franc Meyer." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2014. http://d-nb.info/1074758447/34.
Full textDas, Animesh. "New Pyrazole- and Triazine-Based Ligands as Scaffolds for Oligonuclear Complexes: From Multiredox Stability to Heteronuclear Single Molecule Magnets." Doctoral thesis, 2010. http://hdl.handle.net/11858/00-1735-0000-0006-B06D-5.
Full textYang, Deng-Chiang, and 楊登強. "Self-assembly, Structures and Properties of Metal-Organic Frameworks Based on Pyrazine and Coumarin Mixed Ligands." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/49417165527248905274.
Full text中國文化大學
應用化學研究所
98
(1) Self-assembly of lanthanide metal ions with carboxylate acid ligand Reaction of potassium salt of coumarin-3-carboxylic acid（KCCA） with M(NO3)3．nH2O (M = Gd, Dy, and Er) or MCl3．6H2O (M = Tb and Ho) at ambient temperature conditions led to the formation of 1-D coordination polymers of {[Gd(CCA)3(H2O)2 ]．2 (H2O)}n (1)、{[Tb(CCA)3(H2O)2 ]．2 (H2O)}n (2)、{[Dy(CCA)3(H2O)2 ]．2 (H2O)}n (3)、{[Ho(CCA)3(H2O)2 ]．2 (H2O)}n (4)、and {[Er(CCA)3(H2O)2 ]．2 (H2O)}n (5) . The structures, magnetism and luminescence properties of these five lanthanide complexes were studied. (2) Synthesis of coordination polymers from cadmium metal ion and pyrazine ligand Treatment of Cd(NO3)2．4H2O with 4,4’-oxydiphthalic anhydride (OBTA) and 2,3,5,6-tetra(pyridin-2-yl) pyrazine (TPPZ) in water / ethanol mixture under hydrothermal conditions, by controling the ratio of the metal and ligand, produced a 1-D coordination polymer, {[Cd(TPPZ)(H2OBTA)(H2O)‧H2O]}n (6) and 2-D network coordination polymer of {[Cd2(TPPZ)(OBTA)(H2O)]}n (7). Their structures were characterized by powder X-ray diffraction and single-crystal X-ray diffraction analyses. Their stability was examined by thermogravimetric analysis. Their photochemical properties were also studied.
謝長志. "Pyrazole-organonitrile coupling reaction activated by Ni(II) ions and syntheses and characterization of metal complexes with N2S-containing schiff base ligand." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/61429581972511389660.
Full text國立彰化師範大學
化學系
97
Abstract By using the coupling reaction between pyrazole (HPz) and organic nitrile (RCN) mediated by Ni2+ ions, a series of pyrazolylamidinonickel complexes were synthesized. When four equivalent of HPz and one equivalent of [Ni(MeCN)6][X-] (X-= ClO4-, BF4- , or NO3-) were stirred in MeCN, complexes [Ni(MeCN)2(HPz)4][X-] (X-= ClO4- (1)，BF4- (5)，NO3- (9)) were obtained immediately, which serve as the intermediates for the coupling reaction. Although the isomerization of complexes 1 and 9 to complexes [Ni(HPz)2(HN=C(Me)Pz)2][X-] (X- = ClO4- (2), NO3- (10)) occurs slowly at room temperature, the coupling reaction in complex 5 does not happen without the aid of weak base NEt3. The reaction is also successfully conducted with other nitriles RCN bearing electron-donating group (R = Et, Bz). Based on the effects of counter anion on the rate of coupling reaction, solution IR, UV-vis spectroscopies, and X-ray crystal structure determination, a mechanism based on anion-mediated/hydrogen-bonding-driven proton transfer for the coupling reaction is proposed. Besides, we synthesized and characterized a new N2S organic ligand 2-(o-methylthiophenyliminomethyl)pyrrole (MeLH) (13), and tested the coordination reactivity toward transition metal ions Co2+, Co3+, Fe2+, Ni2+, and Cu2+. A series of metal complexes bearing this ligand were obtained: M2+(MeL)2 (M2+=Ni2+ (14), Cu2+ (15), Fe2+ (16), Co2+ (17)), Co3+(MeL)3 (18), and Co3+(MeL)(L) (19). Two stereo-isomers of complex 14 were gained, depending on the crystallization conditions. Complex 19 is the reaction product of complex 18 exposed under UV light. All complexes 13-19 were characterized by NMR, IR, UV-vis, EPR, EA, ESI-MS, and X-ray analyses. The properties of these complexes with MeLH ligand were also discussed in this report.
Das, Animesh [Verfasser]. "New pyrazole- and triazine-based ligands as scaffolds for oligonuclear complexes : from multiredox stability to heteronuclear single molecule magnets / vorgelegt von Animesh Das." 2009. http://d-nb.info/1001944291/34.
Full textTsai, Huei-Ru, and 蔡惠如. "Investigation of Emission Mechanism and Raman Spectra of Cyclometalated Ir(III) Complexes with Imidazolyl, Pyrazolyl, and Pyridyl-based Ligands." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/32303704268019454097.
Full text國立清華大學
化學系
99
We recorded the UV-vis absorption, emission and excitation spectra for complexes fac-tris(1-(4-fluorophenyl)-3-methylimidazolin -2-ylidene-C,C2') iridium(III), fac-Ir(fpmi)3, and fac-tris(1-(2,4–fluorophenyl)-3-methyl imidazolin-2-ylidene-C,C2')iridium (III), fac-Ir(dfpmi)3 and their ligands 1-(4-fluorophenyl)-3-methyl-1H-imidazol-3-ium iodide (H2fpmi+I-), 1-(2,4- difluorophenyl)-3-methyl-1H-imidazol-3-ium iodide (H2dfpmi+I-), 1-(4- fluorophenyl)-3-methyl-1H-imidazol-3-ium hexafluorophosphate (H2fpmi+PF6-) and 1-(2,4-difluorophenyl)-3-methyl-1H-imidazol-3-ium hexafluorophosphate (H2dfpmi+PF6-). Using theoretical calculations-density functional theory (DFT) and time-dependent DFT (TD-DFT), we obtained their optimized structures and assigned the emission bands at 320-440 nm and 370-500 nm to 1π-π* and 3π-π* for the ligands and complexes, respectively. For these blue-emission complexes the lowest emission bands are from 3π-π* instead of the triplet metal-ligand charge transfer state. This explains the low photoemission quantum yield for these complexes. We also recorded the Raman and IR spectra. From comparing with the results of DFT calculations, we assigned the vibrational spectra for fac-Ir(fpmi)3, fac-Ir(dfpmi)3, fac-Ir(ppz)3 and FIrpic. We assigned six Ir-ligand stretching, ν(Ir-C) and ν(Ir-C:) to Raman lines 286/303 and 332 cm-1 for fac-Ir(fpmi)3, and 283/299 and 377 cm-1 for fac-Ir(dfpmi)3, ν(Ir-N) and ν(Ir-C) to 229/243 and 270/321 cm-1 for fac-Ir(ppz)3, and ν(Ir-Npic), ν(Ir-Nph), ν(Ir-O) and ν(Ir-C) to 267, 282, 304 and 321 cm-1 for FIrpic. For fac-Ir(dfpmi)3 the ν(Ir-C:) band is blue-shifted 45 cm-1 than that in fac-Ir(fpmi)3. For FIrpic ν(Ir-N) and ν(Ir-C) are also blue-shifted than those for fac-Ir(ppy)3 showing strong Ir-ligand bonding.
Katsiaouni, Stamatia. "Neuartige Pyrrol/Pyrazol-Bausteine für die Synthese von Hybrid-Makrozyklen, azyklischen Ligandsystemen und bimetallischen Komplexen." Doctoral thesis, 2007. http://hdl.handle.net/11858/00-1735-0000-0006-ACA0-A.
Full textHsu, Cheng-Chih, and 徐丞志. "(1) High-Efficiency, Osmium(II)-Based Phosphorescent Materials: The Distinctive Photoluminescent Properties of Two Isomeric OsII Complexes Containing 2-pyridyl pyrazole Family Ligands(2)Ortho Green Fluorescence Protein Synthetic Chromophore; Excited-Sta." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/25975439453857741781.
Full text國立臺灣大學
化學研究所
95
part 1. A general review of 2nd and 3rd – row transition-metal complexes incorporating chelating chromophores, which serves as phosphorescent dyes for organic light-emitting diodes, will be depicted in chapter 1. Group of Chi have synthesized two monometallic and isomeric complexes 3 and 4 with the coordination of two phosphine ligands located in the trans-disposition and one CO and one hydride located opposite to the pyridyl triazolate chelate. Chapter 2 focuses on subtle differences in photophysical properties examined for isomers 3 and 4 on the basis of steady state absorption and emission, the relaxation dynamics, and temperature- dependent luminescent studies. The results, in combination with time-dependent density function theory (TDDFT) calculations, provide fundamental insights into the future design and preparation of highly efficient phosphorescent emitters. part 2. In chapter 3 the focus is mainly limited to the subject related to the photoinduced excited-state inter/intra-molecular proton transfer (ESPT) process, forming a proton-transfer isomer. Our main goal aims at bi-functional molecules possessing a proton donor group and a proton acceptor group so that ESPT takes place either intramolecularly (i.e. intrinsically) or through the assistance of the guest molecules. Futhermore, a structural isomer of the core chromophore (p-HBDI) in green fluorescence protein, o-HBDI, and as well as a new series of ortho-hydroxy analogues, is synthesized. o-HBDI possesses a seven-membered-ring hydrogen bond, from which the excited-state intramolecular proton transfer takes place, resulting in a remarkable tautomer emission of ~605 nm and be fully discussed in chapter 4.
Liao, Chein-Hung, and 廖健宏. "Synthesis, Characterization of Aluminum and Lithium Complexes Containing Pyrazolyl-, Oxazolyl-based Sulfonamide or bis-Phenolate Ligands and Their Applications in Ring Opening Polymerization of Cyclic Esters." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/h3z5az.
Full text國立中興大學
化學系所
99
The pyrazolyl-, oxazolyl-based sulfonamide 71-80 or bis-phenolate 100-101 ligand precursors have been prepared. Treatment of ligand precursors with 1.1 equiv. of AlMe3 affords aluminum alkyl complexes 84-94, 102-103, with 2.1 equiv. of nBuLi affords lithium complexes 108-110. Reactions of aluminum alkyl complexes 102-103 with benzyl alcohol or 9-anthracenemethanol afford aluminum alkoxide complexes 104-107. All these compounds were characterized by NMR spectroscopy and elemental analysis. The molecular structures of complexes 88, 92, 94, 102, 107-110 were determined by single-crystal X-ray diffraction techniques. The aluminum alkyl complexes 84-94, 102-103 exhibit efficient activity in the ring-opening polymerization of ɛ-carprolactone in the presence of benzyl alcohol. The aluminium alkoxide complexes 104-107 exhibit efficient activity in the ring-opening polymerization of ɛ-carprolactone. The lithium complexes 108-110 exhibit efficient activity in the ring-opening polymerization of L-lactide in the presence of benzyl alcohol. They also exhibit both “living” and “immortal” characters
Hsu, Cheng-Chih. "(1) High-Efficiency, Osmium(II)-Based Phosphorescent Materials: The Distinctive Photoluminescent Properties of Two Isomeric OsII Complexes Containing 2-pyridyl pyrazole Family Ligands (2)Ortho Green Fluorescence Protein Synthetic Chromophore; Excited-State Intramolecular Proton Transfer via a Seven-Membered-Ring Hydrogen-Bonding System." 2007. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0001-0307200717191300.
Full textProkofieva, Angelina. "Bioinspired oxidation reactions of phenols with dinuclear copper complexes." Doctoral thesis, 2007. http://hdl.handle.net/11858/00-1735-0000-000D-F12D-0.
Full text