Log in

Relevant bibliographies by topics / Alkynyl complexes / Dissertations / Theses

To see the other types of publications on this topic, follow the link: Alkynyl complexes.

Dissertations / Theses on the topic 'Alkynyl complexes'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 dissertations / theses for your research on the topic 'Alkynyl complexes.'

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.

1

George, Darren Shawn Allen. "Alkyne and alkynyl complexes of rhodium and iridium." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape7/PQDD_0025/NQ39530.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Ballisai, Antonio. "Synthesis of rigid-rod metal-alkynyl complexes." Thesis, Imperial College London, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.433302.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Chan, Yew Boon Colin. "Synthesis and reactivity of platinum alkynyl complexes." Thesis, Imperial College London, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.395761.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Wang, Ruiping. "Indenyl nickel complexes bearing alkynyl, alkenyl and triflate ligands." [Montréal] : Université de Montréal, 2003. http://wwwlib.umi.com/cr/umontreal/fullcit?pNQ82764.

Full text

Abstract:

Thèse (Ph. D.)--Université de Montréal, 2003.
"NQ-82764." "Thèse présentée à la faculté des études supérieures en vue de l'obtention du grade de philosophiae doctor (Ph. D.) en chimie." Version électronique également disponible sur Internet.

APA, Harvard, Vancouver, ISO, and other styles

5

Eaves, Samantha Grace. "Trans-bis(alkynyl) ruthenium complexes : synthesis, structure and reactivity." Thesis, Durham University, 2015. http://etheses.dur.ac.uk/11444/.

Full text

Abstract:

This Thesis describes the synthesis and characterisation of a series of trans-bis(alkynyl) ruthenium complexes, trans-[Ru(C≡CR)2(L)4], to better understand how the variation of the metal ancillary ligands (L) affect electronic structure and spectroscopic properties, chemical reactivity, and behaviour in metal|molecule|metal junctions. Reactions of cis-[RuCl2(dppm)2] with terminal alkyne HC≡CC6H4-4-R, in the presence of TlBF4 and base, gives into trans-bis(alkynyl) complexes, trans-[Ru(C≡CC6H4-4-R)2(dppm)2], for electron withdrawing R groups or cationic η3-butenynyl complexes, E-[Ru(η3-{HC(C6H4-4-R)=CC≡C(C6H4-4-R)})(dppm)2]+ for electron donating R groups. Reactions of cis-[RuCl2(dppm)2] with di-terminal alkynes HC≡CC6H4-2,5-X2-4-C≡CH, in the presence of TlBF4 and [NnBu4]Cl, gives trans-[RuCl(C≡CC6H2-2,5-X2-4-CCl=CH2)(dppm)2], inferring a quinoidal cumulene intermediate. Multi-metallic trans-bis(alkynyl) {Ru(dppe)2} complexes, varying in binding groups and bridging ligands, have been prepared. Reversible oxidation processes, whilst corresponding to the number of integrated metal centres, exhibit a high degree of alkynyl character in all cases. The vibrational and electronic spectra of both neutral and oxidised complexes are complicated by the presence of numerous spectroscopically distinct rotamer conformations and redox isomers. For example in the case of mono-oxidised complexes, a principal low-energy (π-π*) NIR band is exhibited along with multiple higher energy (MLCT-type) NIR bands, which can be assigned by comparison with smaller model systems. Finally, trans-bis(alkynyl) {Ru{P(OEt)3}4} complexes have been synthesised. As a result of the increased (pseudo D4h) molecular symmetry and consequent fewer distinct rotamer conformations, a lesser number of NIR bands are exhibited for trans[Ru(C≡CR)2{P(OEt)3}4]+ than bis-chelating dppm and dppe derivatives. Between trans-[Ru(C≡CR)2(PPʹ)] (PPʹ = (dppe)2, {P(OEt)3}4) complexes, the {Ru(dppe)2} derivatives give rise to conductance histograms with additional features. These features are attributed to contacts formed at or across the dppe-phenyl rings, leading to suggestions that phosphite complexes might be novel ‘insulated’ molecular wires.

APA, Harvard, Vancouver, ISO, and other styles

6

Humphrey, Mark Graeme. "Aspects of organometallic chemistry, particularly metal alkynyl and cluster chemistry." Title page, contents and abstract only, 2002. http://web4.library.adelaide.edu.au/theses/09SD/09sdh9267.pdf.

Full text

Abstract:

Includes bibliographical references. Details research carried out into the nonlinear optical properties of metal alkynyls, chiefly organoruthenium complexes, showing that these complexes can be designed to have very large NLO coefficients. Also demonstrates the utility of spectroscopic, electrochemical and copmutational aids as predictive tools for NLO materials. Also examines cluster synthesis, reactivity and physical properties using ruthenium clusters and hard-donor ligands, affording a series of cluster complrxes that provide structural models for industrially-important hydrotreating intermediates.

APA, Harvard, Vancouver, ISO, and other styles

7

楊覺茵 and Kok-yan Yeung. "Syntheses, photophysics and photochemistry of alkynyl-, sulfido- and selenido- platinum(II) complexes." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1996. http://hub.hku.hk/bib/B31236388.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Yeung, Kok-yan. "Syntheses, photophysics and photochemistry of alkynyl-, sulfido- and selenido- platinum(II) complexes /." Hong Kong : University of Hong Kong, 1996. http://sunzi.lib.hku.hk/hkuto/record.jsp?B18597531.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Schauer, Philip A. "Organometallic synthons for highly conjugated redox-active materials." University of Western Australia. School of Biomedical, Biomolecular and Chemical Sciences, 2009. http://theses.library.uwa.edu.au/adt-WU2009.0166.

Full text

Abstract:

[Truncated abstract] This thesis describes various synthetic approaches toward the synthesis of highly conjugated complexes incorporating multiple transition metal centres. Particular attention is given to the synthesis of mononuclear complexes that allow for the facile assembly of discrete oligo- and poly-nuclear complexes in a controlled, stepwise fashion. Conjugated multi-metallic materials are of interest on account of their unique photophysical and electronic properties, with a particular emphasis on elucidating the nature of intramolecular communication between multiple metal centres. Chapter 1 provides a survey of these topics and current research efforts in the field. Chapter 2 describes the synthesis of Group-VIII allenylidene complexes incorporating a terminal bipyridyl moiety that provides a site for further coordination. The new compound 9-hydroxy-9-ethynyl-4,5-diazafluorene was synthesised, and reaction of this proligand with a coordinatively unsaturated metal fragment yields the allenylidene complexes [MCl(PnP)2=C=C=(4,5-diazafluoren-9-yl)]PF6 (M = Ru, PnP = dppm, dppe, dmpe; M = Os, PnP = dppm) and [CpRu(dppe)=C=C=(4,5-diazafluoren- 9-yl)]PF6. The dmpe-ligated complex is particularly susceptible to decomposition, though it was possible to obtain partial spectroscopic characterisation in addition to a single-crystal X-ray structural determination. The remaining allenylidene complexes are stable compounds readily characterised by standard spectroscopic and electrochemical means, with the bis(diphosphine) complexes characterised by single crystal X-ray structural determinations. ... Reactions of the proligand with [RuCl(PnP)2]+ (PnP = dppm, dppe) led to the isolation of a product spectroscopically consistent with the formation of the target cationic allenylidene complexes, though the complexes were not readily purified and the identity of the accompanying anion was not elucidated. The new compound 4-hydroxy-4- ethynyl-cyclopentadithiophene was also prepared, though the compound was found to be highly unstable and susceptible to rapid decomposition. The derived allenylidene complexes [RuCl(PnP)2=C=C=(4-cyclopentadithiophene)]PF6 (PnP = dppm, dppe) were isolated in a pure form and the complexes stable toward spontaneous decomposition. The thienyl-derived allenylidene complexes were characterised by spectroscopic and electrochemical techniques, with a single-crystal X-ray structural determination undertaken for [RuCl(dppm)2=C=C=(4-cyclopentaditiophene)]PF6. Electrochemical properties are significantly different between the complexes, and also show significant variation between electrodes and solvents. The terminal thienyl substituents are electroactive and show one or two oxidation processes consistent with oligomerisation of the thienyl moiety in dichloromethane solvent, and in acetonitrile solvent cyclic voltammograms are consistent with the deposition of an electroactive film on the electrode surface. The electro-polymerisation of the thienylallenylidene complexes offers a promising new route toward multi-metallic allenylidene complexes.

APA, Harvard, Vancouver, ISO, and other styles

10

Chow, Lok-fung. "Light-emitting platinum (II) and gold (I) complexes containing alkynyl and isocyanide ligands." Click to view the E-thesis via HKUTO, 2010. http://sunzi.lib.hku.hk/hkuto/record/B44096471.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Lu, Wei, and 陸為. "Light-emitting platinum (II) and gold (I) complexes containing cyclometalated and alkynyl ligands." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2003. http://hub.hku.hk/bib/B26721090.

Full text

APA, Harvard, Vancouver, ISO, and other styles

12

Bitcon, Caroline. "Synthesis and redox properties of organometallic alkynyl complexes of molybdenum, tungsten, iron and ruthenium." Thesis, University of Manchester, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.328284.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

Chan, Siu-chung, and 陳兆聰. "Photoluminescent and electroluminescent properties of neutral platinum(II) complexes containing alkynyl and multi-anionic ligands." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2004. http://hub.hku.hk/bib/B31245171.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

Poon, Suk Yue. "Synthesis, characterization and photophysics of alkynyl-derived inorganic and organometallic materials comprising group 13,14 and 16 elements." HKBU Institutional Repository, 2005. http://repository.hkbu.edu.hk/etd_ra/662.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

Liu, Li. "The chemistry of luminescent mercury (II) alkynyl complexes and their platinum (II) and gold (I) counterparts." HKBU Institutional Repository, 2005. http://repository.hkbu.edu.hk/etd_ra/627.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

Gietz, Twyla Mae, and University of Lethbridge Faculty of Arts and Science. "Lithium complexes of ketoimines and novel alkynyl imines and diimines : discoveries in the attempted synthesis of PACNAC." Thesis, Lethbridge, Alta. : University of Lethbridge, Dept. of Chemistry and Biochemistry, c2010, 2010. http://hdl.handle.net/10133/2481.

Full text

Abstract:

Two different methodologies were used to attempt the synthesis of a novel P‐N ligand, denoted as PACNAC for the similarity to the analogous NACNAC and ACAC ligands. Although the synthesis of PACNAC was not successful, each methodology led to interesting discoveries. First, a number of lithium complexes of ketoimines were isolated and studied by Xray crystallography and NMR spectroscopy revealing some interesting substituent based effects on the structure, solubility and solution state behaviour. The X‐ray data of the two known and two related novel ketoimines were also collected and compared to the lithium complexes. Secondly, the synthesis of novel alkynyl imines along with the new alkynyl diimines by novel synthetic routes and studied by x‐ray crystallography, NMR, electrochemistry, and UV‐Visible spectra.
xvi, 134 leaves : ill. (some col.) ; 29 cm + 1 CD-ROM

APA, Harvard, Vancouver, ISO, and other styles

17

Chan, Ka-man Carmen. "Design and synthesis of luminescent branched multinuclear platinum(II) alkynyl complexes and the study of their two-photon absorption properties." Click to view the E-thesis via HKUTO, 2010. http://sunzi.lib.hku.hk/hkuto/record/B43703653.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Chan, Ka-man Carmen, and 陳嘉敏. "Design and synthesis of luminescent branched multinuclear platinum(II)alkynyl complexes and the study of their two-photon absorptionproperties." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2010. http://hub.hku.hk/bib/B43703653.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

He, Xiaoming, and 何晓明. "Design, synthesis and characterization of alkynyl- and thiolato-gold (I) complexes with various receptor groups for host-guestchemistry." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2010. http://hub.hku.hk/bib/B43571979.

Full text

APA, Harvard, Vancouver, ISO, and other styles

20

Liu, Tsz-chung Alvin, and 廖子衝. "Design and synthesis of luminescent coumarin-containing platinum (II) terpyridine alkynyl complexes and their spectroscopic, photophysicaland binding studies." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2011. http://hub.hku.hk/bib/B47168353.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Burgun, Alexandre. "Oxidative activation of iron- and ruthenium-alkynyl complexes : toward square-shaped molecules with four redox-active metal centres." Rennes 1, 2011. http://www.theses.fr/2011REN1S081.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Lam, Chan-fung, and 林親鳳. "Synthesis, optical and luminescence studies of rhenium(I) diimine alkynyl complexes and their utilization as building blocks for theassembly of multinuclear and mixed-metal complexes." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2005. http://hub.hku.hk/bib/B32010564.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Lam, Chan-fung. "Synthesis, optical and luminescence studies of rhenium(I) diimine alkynyl complexes and their utilization as building blocks for the assembly of multinuclear and mixed-metal complexes." Click to view the E-thesis via HKUTO, 2005. http://sunzi.lib.hku.hk/hkuto/record/B32010564.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Cámara, Hernández Verónica. "Nuevos alquinil complejos y carbenos N-Heterocíclicos de oro(I). Autoensamblaje de complejos heteronucleares usando metaligandos de oro(I)= New alkynyl and N-Heterocyclic gold(I) complexes. Self-assembly of heteronuclear complexes usin gold(I) metallaligands." Doctoral thesis, Universidad de Murcia, 2013. http://hdl.handle.net/10803/128934.

Full text

Abstract:

Objetivos: Los objetivos planteados para esta tesis han sido la síntesis y caracterización de nuevos alquinil complejos y carbenos N-Heterocíclicos (NHC) de oro(I), así como la utilización de algunos de estos complejos como metalaligandos en reacciones de ensamblaje de nuevos complejos heteronucleares. También nos planteamos llevara a cabo estudios estructurales de los nuevos complejos preparados, así como estudios de su comportamiento en disolución, y sus propiedades fotofísicas. Metodología: En primer lugar, se ha llevado a cabo la síntesis de nuevos alquinil complejos y carbenos N-Heterocíclicos de oro(I) utilizando métodos sintéticos estándar, aunque también hemos desarrollado nuevos métodos de síntesis de alquinil NHC complejos de oro(I). Para llevar a cabo el estudio del autoensamblaje de complejos heteronucleares, hemos utilizado alquinil complejos de oro(I) funcionalizados con grupos 2,2'-bipiridilo o 2,2':6',2"-terpiridilo previamente descritos por nuestro grupo de investigación, así como otros nuevos diseñados especialmente para dichos estudios. Los nuevos complejos preparados han sido caracterizados mediante análisis elemental, espectroscopia infrarroja (IR), espectroscopia de resonancia magnética nuclear (NMR) y espectrometría de masas (MS), así como por difracción de rayos X en monocristal, en aquellos casos en que ha sido posible. También se ha realizado un estudio de sus propiedades quirópticas por espectroscopia de dicroísmo circular, y de sus propiedades fotofísicas mediante espectroscopia electrónica de absorción o emisión. Resultados o Conclusiones: Se han sintetizado y caracterizados nuevos alquinil complejos de oro(I) derivados de la 4- y la 5-etinil-2,2'-bipiridina. Estos complejos incluyen complejos mononucleares con ligandos fosfina o isonitrilo, complejos dinucleares con ligandos difosfina o dicarbeno puente, y un complejo aniónico con dos unidades bipiridilo. Los primeros dialquinilos de oro(I) con ligandos carbenos N-Heterocíclicos (NHC) han sido preparados mediante tres métodos distintos, dos de los cuales han sido utilizados por primera vez para la síntesis de NHC complejos de oro(I). Del estudio de las propiedades fotofísicas se ha concluido que los complejos dinucleares (cloro)NCH de oro(I) preparados son luminiscentes a temperatura ambiente en estado sólido y sus emisiones son similares a las observadas en sus análogos mononucleares. Mientras que la mayoría de los dialquinil complejos de oro(I) son luminiscentes a temperatura ambiente tanto en estado sólido como en disolución, en particular aquellos derivados de aril- o heteroaril alquinos. De las reacciones de ensamblaje con ligandos monoalquinílicos derivados de la etinilbipiridina se han obtenido mezclas en equilibrio de los isómeros fac y mer de los complejos pseudooctaédricos donde tres ligandos se coordinan a un mismo metal. En algunos casos se ha observado una dependencia anómala del equilibrio con el disolvente que se ha explicado como consecuencia de la formación de dímeros fac,fac y de efectos de solvatación. Por otro lado, cuando los metalaligandos con dos unidades oro-etinil-bipiridina conectadas por una difosfina reaccionan con Fe(II), Zn(II) o Co(II), se obtienen complejos de tipo helicato triple selectivamente. La diasteroselectividad del proceso de autoensamblaje se ha estudiado en las reacciones de Fe(II) con metalaligandos quirales, y la configuración absoluta de los principales diastereoisómeros ha sido determinada por espectroscopia de dicroísmo circular. Además los nuevos helicatos de zinc(II) emiten en estado sólido y en disolución a temperatura ambiente. También se han preparado complejos trinucleares de Zn(II) y Co(II) con ligandos terpiridina funcionalizados, así como polímeros de coordinación heterometálicos con estructuras de tipo "varilla rígida". Por último, se ha llevado a cabo la síntesis y caracterización de macrociclos mono- y dinucleares de Ag(I) y Au(I), usando ligandos dicarbeno conectados por cadenas alquílicas de distintas longitudes, lo que nos ha permitido relacionar la longitud de la cadena con la estabilidad de cada tipo de macrociclo y observar a su vez el equilibrio entre ambos tipos de macrociclos. Además, se ha llevado a cabo la síntesis y caracterización del primer complejo de Au(III) con un ligando dicarbeno quelato en disposición trans.
Objectives: The main aims of this thesis have focused on the synthesis of new types of alkynyl and N-Heterocyclic carbene (NHC) gold(I) complexes, as well as on the study of coordination-driven self-assembly of complexes presenting helical or rod-like structures using gold(I) metallaligands and metal cations as building blocks. In addition, we were interested in the study of new structural motifs, in particular those derived from aurophilic interactions, as well as in the study of the solution behavior and the photophysical properties of the new compounds. Methodology: Some of the new alkynyl and NHC gold(I) complexes have been prepared by using reported synthetic methods. In addition, we have developed new synthetic methods for the preparation of a new type of dinuclear alkynyl gold(I) complexes containing bis(NHC) ligands. We have used gold(I) alkynyls derived from 2,2'-bipyridine or 2,2':6,6'-terpyridine as metallaligands for the self-assembly studies, some of which were previously described by our group, but other have been specifically designed for these studies. The new complexes have been characterized by elemental analysis, infrared spectroscopy (IR), nuclear magnetic resonance spectroscopy (NMR) and mass spectrometry (MS). Crystal structure determinations by X-ray diffraction were carried out for representative members of most of the new families of compounds prepared. The absolute configuration of the helical complexes was determined by circular dichroism spectroscopy, and the photophysical properties of several families of compounds were studied by using absorption or emission electronic spectroscopy. Results and Conclusions: Firstly, new alkynyl gold(I) metallaligands derived from 4- or 5-ethynyl-2,2'-bipyridine have been synthesized and characterized. These include mononuclear complexes with isonitrile or phosphine ligands, dinuclear complexes with bridging diphosphine or dicarbene ligands, and an anionic complex containing two bipyridine units. The first dinuclear gold(I) alkynyls containing bridging bis(NHC) ligands have been prepared by three different methods, two of which have been used for the first time in gold carbene chemistry. Most of these dinuclear alkynyl gold(I) complexes are luminescent at room temperature, in particular those derived from aryl- or heteroaryl alkynes, and their emissions have been assigned to singlet and triplet ligand-based pi-states, with little participation of the gold orbitals. The reactions of monoalkynyl gold(I) complexes derived from ethynyl-bipyridine and Fe(II), Co(II) or Zn(II) cations give mixtures of fac- and mer-pseudooctahedral complexes, where three ligands are coordinated to the same metal center. In some cases, we observed an anomalous solvent-dependence of the equilibrium, which has been explained by solvation effects and formation of fac,fac-dimers. On the other hand, metallaligands containing two gold-ethynyl-bipyridine units linked by a bridging diphosphine, react with Fe(II), Zn(II) or Co(II) salts to give selectively triple helicates containing two gold atoms in each strand. Diastereoselective self-assembly was observed in the reactions of chiral metallaligands with Fe(II), and the absolute configurations of the main diastereomers were determined by circular dichroism spectroscopy. In addition, the zinc(II) helicates are emissive in both solid state and solution at room temperature. New trinuclear Zn(II) or Co(II) complexes and two rod-shaped coordination polymers containing alternated Au and Zn(II) or Co(II) metal centers in its main chain have been synthesized by reaction of the corresponding M(II) cations with terpyridine-functionalized metallaligands. Finally, we have prepared the first family of Ag(I) and Au(I) dicarbene complexes, which exist as mononuclear and dinuclear metallamacrocycles in equilibrium. Some of these complexes have been isolated and the mononuclear/dinuclear interconversion equilibrium has been studied. In addition, an unprecedented Au(III) complex containing a trans-spanning dicarbene ligand has been prepared.

APA, Harvard, Vancouver, ISO, and other styles

25

Chan, Hoi-yiu, and 陳凱耀. "Design and synthesis of luminescent mono- and dinuclear platinum(II) alkynyl terpyridine complexes: fromphotophysics to aggregation and self-assembly." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2006. http://hub.hku.hk/bib/B36929232.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

He, Xiaoming. "Design, synthesis and characterization of alkynyl- and thiolato- gold (I) complexes with various receptor groups for host-guest chemistry." Click to view the E-thesis via HKUTO, 2010. http://sunzi.lib.hku.hk/hkuto/record/B43571979.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Chung, Wai-kin. "Design and syntheses of luminescent rhenium(I) diimine alkynyl complexes with hole-transporting and/or electron-transporting moieties and their use as potential triplet emitters." Click to view the E-thesis via HKUTO, 2009. http://sunzi.lib.hku.hk/hkuto/record/B42181938.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Chan, Hoi-yiu. "Design and synthesis of luminescent mono- and dinuclear platinum(II) alkynyl terpyridine complexes : from photophysics to aggregation and self-assembly /." Click to view the E-thesis via HKUTO, 2006. http://sunzi.lib.hku.hk/hkuto/record/B36929232.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

Tao, Chi-hang, and 陶志恆. "Synthesis and luminescence studies of branched carbonrich platinum(II)and palladium(II) alkynyl complexes: versatile building blocks for multinuclear assemblies." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2004. http://hub.hku.hk/bib/B31246011.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Chung, Wai-kin, and 鍾偉堅. "Design and syntheses of luminescent rhenium(I) diimine alkynyl complexes with hole-transporting and/or electron-transporting moietiesand their use as potential triplet emitters." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2009. http://hub.hku.hk/bib/B42181938.

Full text

APA, Harvard, Vancouver, ISO, and other styles

31

Hui, Chi-kuen, and 許志權. "Design and synthesis of novel classes of alkynyl-containing platinum (II) complexes as building blocks for supramolecular assemblies andhost-guest chemistry." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2003. http://hub.hku.hk/bib/B31244257.

Full text

APA, Harvard, Vancouver, ISO, and other styles

32

Au, Ka-man, and 區嘉雯. "Luminescent cyclometalated gold (III) complexes with ancillary N-heterocyclic carbene and alkynyl ligands : from design, synthesis, photophysics to supramolecular assembly and functions." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2012. http://hdl.handle.net/10722/207995.

Full text

Abstract:

A library of luminescent cyclometalated gold(III) complexes containing various bis-cyclometalating R-C^N^C ligands derived from 2,6-diphenylpyridine and ancillary alkynyl ligands, [Au(R-C^N^C)(C≡CR’)], has been synthesized. Some of the complexes have been structurally determined by X-ray crystallography. These complexes were found to exhibit intense emission in dichloromethane solution at 298 K, originating from metal-perturbed triplet intraligand (IL) excited states of the R-C^N^C ligand, with substantial charge transfer character from the aryl moiety to the pyridyl ring. In the presence of electron-rich alkynyl ligands, the emission origin could be switched to an alkynyl-to-cyclometalating ligand ligand-to-ligand charge transfer (LLCT) excited state. This class of complexes was also demonstrated to show rich electroluminescence properties as emitters in organic light-emitting devices. In addition, the supramolecular assembly of this class of complexes has also been revealed in gelation studies. N-Heterocyclic carbenes have been incorporated into the gold(III) metal center to prepare a series of luminescent mononuclear and dinuclear gold(III) complexes, [{Au(C^N^C)}n(NHC)](PF6)n and [{Au(tBuC^N^CtBu)}n(NHC)]- (PF6)n (n = 1, 2). The X-ray crystal structures of most of the complexes have been determined. The emissions of these complexes were assigned to originate from the metal-perturbed intraligand excited state of the bis-cyclometalating ligand. One of the C2-bridged dinuclear complexes was found to exhibit two distinct reduction couples, tentatively correlated to the presence of significant intramolecular π-π interaction in the complex. Two novel series of luminescent mononuclear alkynylgold(III) complexes, [Au(C^N)(C≡CR)2] (HC^N = 2-phenylpyridine (Hppy) and derivatives) and [Au(C^N^N)(C≡CR)]PF6 (HC^N^N = 6-phenyl-2,2’-bipyridine and derivatives), have been synthesized. Some of the X-ray crystal structures have been determined. The former class of complexes with bidentate C^N ligands has been observed to show tunable emission spanning across the visible spectrum from 462 to 697 nm. With the exception of [Au(ppy)(C≡C-C6H4-NH2-p)2] which showed a low-energy band originated from a 3LLCT [π(C≡C-C6H4-NH2)→π*(C^N)] excited state, all complexes exhibited vibronic-structured emission bands originated from the intraligand transition of the cyclometalating C^N ligand in dichloromethane solution at 298 K. On the other hand, most of the complexes with the tridentate C^N^N-type ligand have been observed to exhibit vibronic-structured emission bands attributed to the intraligand transition of the C^N^N ligand in low-temperature butyronitrile glass.
published_or_final_version
Chemistry
Doctoral
Doctor of Philosophy

APA, Harvard, Vancouver, ISO, and other styles

33

Lo, Hiu-suet, and 盧曉雪. "Design and syntheses of luminescent alkynyl complexes containing multinuclear platinum (II) and coinage metal centres: from photophysics to host-guest chemistry andsupramolecular architectures." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2009. http://hub.hku.hk/bib/B41633714.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

Hung, Faan-fung, and 孔繁峰. "Luminescent platinum(II), palladium(II) and gold(III) complexes containing isocyanide, alkynyl and N-heterocyclic carbene ligands : synthesis, photophysical properties and material applications." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2014. http://hdl.handle.net/10722/206318.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Lo, Hiu-suet. "Design and syntheses of luminescent alkynyl complexes containing multinuclear platinum (II) and coinage metal centres from photophysics to host-guest chemistry and supramolecular architectures /." Click to view the E-thesis via HKUTO, 2009. http://sunzi.lib.hku.hk/hkuto/record/B41633714.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Lee, Kwok-ming, and 李國明. "Synthesis, characterization and photophysical properties of chalcogenido, phosphinidene and alkynyl complexes of gold (I) and itscongener and their supramolecular assembly arising from metal--metalinteractions." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2011. http://hub.hku.hk/bib/B45983422.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Brayshaw, Simon Keith. "Metal complexes bearing pendant alkynes and metal complexes of N-heterocyclic carbenes." University of Western Australia. School of Biomedical and Chemical Sciences, 2004. http://theses.library.uwa.edu.au/adt-WU2005.0017.

Full text

Abstract:

This thesis is comprised of two parts. The first part describes the synthesis of cyclopentadienyltungsten complexes containing a pendant alkyne group (I), and the subsequent photo-induced intramolecular coordination of the alkyne, forming complexes such as II. Compounds containing intramolecularly coordinated alkynes are rare, and this is the first example using cyclopentadiene as the core ligand. The second part describes the synthesis and structural characterisation of a number of novel metal complexes containing N-heterocyclic carbene ligands, some containing particular functionality for taylored applications. New methods were used to form complexes of rhodium, iridium, silver and gold (eg. III, IV). Structural and spectroscopic properties of the complexes were correlated with electronic characteristics of the ancillary ligands. A number of rhodium and iridium complexes (eg. IV) derived from imidazolium-linked cyclophanes were synthesised and structurally characterised. Complexes of N-heterocyclic carbenes with pendant ionic groups were synthesised, and a preliminary examination of their catalytic activity in water was performed. N-Heterocyclic carbenes complexes containing an electron withdrawing nitro group were synthesised and the effect of the nitro group on metal-ligand bonding was examined.

APA, Harvard, Vancouver, ISO, and other styles

38

Mallors, Ruth Louise. "Alkyne and alkyne-arene complexes of ruthenium." Thesis, University of Edinburgh, 1995. http://hdl.handle.net/1842/15261.

Full text

Abstract:

The introduction begins with an out-line of the cluster surface analogy and looks at the importance of studying small organic molecules on clusters to attain a greater understanding of metallic surfaces. The Chapter goes on to look at the activation of alkynes upon coordination to a cluster and assesses the diverse behaviour of alkynes as ligands, some electron counting considerations are considered. Reaction procedures employed in the synthesis of cluster-alkyne complexes are compared highlighting pros and cons of the different routes. The Chapter concludes with a brief synopsis on the cluster [Ru₆C(CO)₁₇]. Chapter two is concerned with the synthesis and characterisation of a series alkyne substituted hexaruthenium carbonyl complexes. It is shown that through the utilisation of the oxidative decarbonylation reagent trimethylamine-N-oxide, Me₃NO but-2-yne will successively displace carbonyl ligands to yield the complexes [Ru₆C(CO)₁₅(m³:h²:h¹:h¹-Me₂C₂)], 2, [Ru₆C(CO)₁₄(m₃:h²:h¹:h¹:-Me₂C₂)(m:h²:h²-Me₂C₂)], 3. [(Ru₆C(CO)₁₂(m₃h²:h¹:h¹-Me₂C₂)₃], 5 and [Ru₆C(CO)₁₀(Me₂C₂)₄], 6. It is observed that the octahedral array of atoms in complex 2 undergoes a polyhedral rearrangement when reacted to form 3 which exhibits a capped square based pyramid geometry, Complex 3 loses a carbon monoxide ligand to produce [Ru₆C(CO)₁₃(Me₂C₂)₂], 4 via chemical and thermal activation. Complexes 3, 5 and 6 display unusual electron counts of 88 when according to polyhedral electron counting predictions such geometries should have counts of 86, this is discussed. The Chapter goes onto investigate the synthesis of complexes which have difference alkyne ligands bound to the cluster fragment. Complexes [Ru₆C(CO)₁₄(Me₂C₂)(Ph₂C₂), 7, [Ru₆C(CO)₁₅(MeC₂Et)], 8, [Ru₆C(CO)₁₄(MeC₂Et)(Me₂C₂)], 9 and [Ru₆C(CO)₁₂(MeC₂Et)(Me₂C₂)(Ph₂C₂)], 11 are prepared and characterised. The Chapter closes with concluding remarks and an update of the current state of play of the research.

APA, Harvard, Vancouver, ISO, and other styles

39

Tahiri, Mohamed. "Phtalocyanines de fer(i) et de fer(0) : synthese, structure et reactivite." Université Louis Pasteur (Strasbourg) (1971-2008), 1987. http://www.theses.fr/1987STR13043.

Full text

Abstract:

Synthese et caracterisation d'une serie de complexes monoreduits de phtalocyanine de fer de type (fe pc r::(8))**(-) ou r=och::(3), ch::(3), h, cl et cn. On donne les structures par rx de composes monoanioniques et dianionique fe pc**(-) et fe pc**(2-). Proprietes chimiques de fe pc**(2-). De tels especes peuvent etre des modeles d'intermediaires formes dans la reaction de la phenylhydrazine sur la metmyoglobine ou dans le metabolisme de substrats suicides par cytochrome p450

APA, Harvard, Vancouver, ISO, and other styles

40

Laurent, Pascale. "Complexes acyl, alcoxycarbonyl et alkyl tetracarbonylfer : intermédiaires dans la carbonylation catalytique d'halogénures d'alkyle." Brest, 1989. http://www.theses.fr/1989BRES2002.

Full text

APA, Harvard, Vancouver, ISO, and other styles

41

Davoile, Ryan J. "New reactions of metal-alkyne complexes." Thesis, Loughborough University, 2003. https://dspace.lboro.ac.uk/2134/12908.

Full text

Abstract:

This thesis describes the use of bimetallic alkyne complexes for use in variants of the Nicholas reaction. The heterobimetallic core provides a source of chiral control unlike previous protocols reported in the literature, as stereocontrol arises from the inherently chiral cobalt-molybdenum core of these complexes and not from an external source. The inherently chiral heterobimetallic complexes were utilised as efficient chiral auxiliaries for nucleophilic additions to both propargylic alkene and Nicholas salt complexes with a degree of stereocontrol also extending to intramolecular addition. 1,3-Dipolar cycioaddition to homo bimetallic and heterobimetallic enyne complexes to obtain isoxazoline ring systems was investigated, following a report in the literature. A novel homobimetallic 1,3-dipole was synthesised on opening of a cyclopropane, subsequel1tly trapping with a series of aldehyde and imines to efficiently form tetrahydrofuran and pyrrolidine ring structures. Chapter 1: An overview of developments of homobimetallic alkyne complexes in the Nicholas reaction as reported in the literature. Chapter 2: Highlights our research into the use of bimetallic alkyne complexes for use in organic synthesis. Chapter 3: Provides experimental data for our studies.

APA, Harvard, Vancouver, ISO, and other styles

42

Maah, M. J. "Transition metal complexes derived from phospha-alkynes." Thesis, University of Sussex, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.381631.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Al-Resayes, S. I. "Phospha-alkyne complexes of the platinum metals." Thesis, University of Sussex, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.372068.

Full text

APA, Harvard, Vancouver, ISO, and other styles

44

Mylvaganam, Murugesapillai. "Addition-transfer reactions of zirconium alkyne complexes." Thesis, University of British Columbia, 1989. http://hdl.handle.net/2429/27602.

Full text

Abstract:

A unique type of reaction, namely the addition-transfer process, has been developed. This reaction transforms the zirconium alkyne complexes, Cp2Zr(η²-alkyne)(PMe₃), to 2-diphenylphosphino and 2-trimethylstannyl alkenyl zirconium compounds by reaction with Ph₂PCI and Me₃SnCl respectively. In the former process, the Ph₂P group is found to be cis to the Cp₂ZrCl group whereas, in the latter case, the Me₃Sn and the Cp₂ZrCl moieties are trans to one another. This reaction was also used to synthesize dienyl zirconium compounds having Ph₂P substitutions on the diene. Preliminary mechanistic proposals suggest that the Ph₂PCI is reacting via a four-centre pathway involving the P-Cl bond and one of the Zr-C bonds of the zirconium alkyne complex; whereas Me₃SnCl reacts via a transition state similar to a π-complex.
Science, Faculty of
Chemistry, Department of
Graduate

APA, Harvard, Vancouver, ISO, and other styles

45

Sundavadra, Bharat Viram. "The organometallic chemistry of alkyne-bridged bimetallic complexes." Thesis, University of Cambridge, 1993. https://www.repository.cam.ac.uk/handle/1810/272569.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

Reeve, Carolyn. "Some chemical consequences of II-donation by co-ordinated alkynes." Thesis, University of Bristol, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.375912.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

Wexler, Pamela Andrea. "Synthesis and reactivity of tantalum and tungsten alkyne complexes: Models for alkyne cyclization." Diss., The University of Arizona, 1990. http://hdl.handle.net/10150/185228.

Full text

Abstract:

Intermediates in the cyclization reaction of alkynes have been isolated using the group 5 tantalum phenoxide reagents, Ta(DIPP)₂Cl₃(OEt₂) and Ta(DIPP)₃Cl₂(OEt₂) (DIPP = O-2,6-C₆H₃-i-Pr₂). The extent of cyclization has been effected by controlling the sterics at the metal center or the alkyne itself. Reducing the less congested bis phenoxide complex, Ta(DIPP)₂Cl₃(OEt₂), by two electrons in the presence of 2-butyne or 3-hexyne allowed the isolation of an arene complex, (C₆R₆)Ta(DIPP)₂Cl (R = Me, Et), which is formally classified as a 7-metallanorbornadiene. This complex can also be reduced by one more electron to produce a tanatalum (II) species that readily undergoes a one-electron addition reaction with halogenated reagents. This complex also underwent an intramolecular C-H activation of one of the alkyl groups on the arene ring. Attempts were made to try and generalize this cyclization and C-H activation chemistry to the group 6 metals. Tungsten phenoxide and mixed phenylimido-phenoxide reagents were synthesized for use in subsequent cyclization reactions. Reducing the bis phenoxide complex, W(DIPP)₂Cl₄, by two electrons in the presence of a variety of alkynes afforded the alkyne complexes W(DIPP)₂Cl₂(RC≡CR') (R = R' = Me, Et, Ph; R = CMe₃, R' = H). The mixed phenylimido-phenoxide complexes, W(NAr)(DMP)ₓCl₃₋ₓ (x = 1 or 2; NAr = N-2,6-C₆H₃-i-Pr₂; DMP = O-2,6-C₆H₃Me₂), were also reduced by two electrons in the presence of alkynes to afford adducts (i.e. W(NAr)(DMP)₂(EtC≡CEt)). These alkyne adduct complexes failed to undergo any cycloaddition reactions. Reduction of the tantalum tris phenoxide complex, Ta(DIPP)₃Cl₂(OEt₂), by two electrons in the presence of the bulky alkynes diphenylacetylene or trimethylsilyl-1-propyne afforded the isolation of the alkyne adducts (DIPP)₃Ta(PhC≡CPh) and (DIPP)₃Ta(Me₃SiC≡CMe) respectively. The alkyne adduct (DIPP)₃Ta(Me₃SiC≡CMe) undergoes regioselective cross-coupling reactions with smaller alkynes to afford metallacyclopentadienes. Metallacyclopentadienes can be formed directly from the reduction of the tris phenoxide complex in the presence of smaller alkynes (i.e. (DIPP)₃Ta(CEt=CEtCEt=CEt)). The alkyne adduct undergoes cyclization reactions with nitriles that contain α-hydrogens to yield metallacycloenamine complexes (DIPP)₃Ta(CSiMe₃=CMeC(=CHR)NH). The adduct also reacts with ketones to produce metallacyclic complexes with the formulation (DIPP)₃Ta(CSiMe₃=CMeC(RR')O).

APA, Harvard, Vancouver, ISO, and other styles

48

Harding, David James. "Redox-active group 6 transition metal alkyne complexes." Thesis, University of Bristol, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.324328.

Full text

APA, Harvard, Vancouver, ISO, and other styles

49

Fletcher, Anthony James. "Preparation and synthetic use of heterobimetallic alkyne complexes." Thesis, Loughborough University, 2002. https://dspace.lboro.ac.uk/2134/35938.

Full text

Abstract:

This thesis describes the use of heterobimetallic alkyne complexes for use in an efficient stereoselective variant of the Pauson-Khand reaction. Unlike previous protocols found in the literature the source of chiral control upon cyclisation arises solely from the inherently chiral CoMoC2 core of these complexes and not from an external source. The inherently chiral Co(CO)3MoCp(CO)2- and desymmetrised Co2(CO)5(PPh3)-alkyne complexes were utilised as efficient chiral auxiliaries for nucleophilic additions to remote centres of complexed propargylic aldehydes to form secondary propargyl alcohols with a degree of diastereocontrol. A new procedure for the preparation of Co(CO)3MoCp(CO)2-alkyne complexes has also been addressed in which an adaptation of previously known methodology was devised for rapid and robust synthesis negating specialist techniques and procedures. The diastereoselective complexation of Co2(CO)7(PPh3) with a range of chiral alkynols has also been demonstrated with the view to bring about a stereoselective catalytic PK reaction procedure. Chapter 1 [is] an overview to the uses of dicobalt-alkyne complexes in the literature and developments in this field Chapter 2 highlights our research into the use of heterobimetallic-alkyne complexes for use in organic synthesis. Chapter 3 provides experimental data for our studies.

APA, Harvard, Vancouver, ISO, and other styles

50

Cairns, Gareth Alan. "Novel aspects of alkyne substituted transition metal complexes." Thesis, University of Bath, 1998. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.242813.

Full text

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!