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Dissertations / Theses on the topic 'Alkynyl'

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Published: 10 December 2022
Last updated: 28 January 2023

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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.

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2

Yasui, Hiroto. "Studies on Addition to 1-Aryl-1-alkynes and N-Alkynyl Amides." 京都大学 (Kyoto University), 2008. http://hdl.handle.net/2433/57271.

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Kyoto University (京都大学)
0048
新制・課程博士
博士(工学)
甲第13827号
工博第2931号
新制||工||1433(附属図書館)
26043
UT51-2008-C743
京都大学大学院工学研究科材料化学専攻
(主査)教授 大嶌 幸一郎, 教授 檜山 爲次郎, 教授 松原 誠二郎
学位規則第4条第1項該当
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3

Bailey, Austin Lou. "Alkynyl and isocyanobiphenyls : new thermotropic liquid crystals." Thesis, University of British Columbia, 1989. http://hdl.handle.net/2429/27388.

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The presence of mesomorphism in 4-n-alkyl-4'-isocyanobiphenyls 4 and 4-n-alkyl-4'-alkynylbiphenyls 5 was investigated, based on the liquid-crystallinity of the cyanobiphenyls 2 (R = n-alkyl). Compound 4 (R = n-butyl) is non-mesomorphic, whereas 4 (R = n-pentyl) is a virtual liquid crystal melting at 34-35°C and supercooling to a nematic phase at 30°C, and 4 (R = n-hexyI) is a nematic liquid crystal from 9 to 19°C. Compounds of structure 5 (R = n-pentyl, X = Si(CH₃)₃, H, CH₃, CI) are not liquid crystals. The corresponding bromo- and iodoalkynes (5, R = n-pentyl, X = Br, I) are liquid crystals with mesomorphic ranges of 88-108°C and 110-119°C, respectively. [See Thesis for Diagram]
Science, Faculty of
Chemistry, Department of
Graduate
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4

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.

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5

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.

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6

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

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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.
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7

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

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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.
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8

Shen, Lixin. "Design and synthesis of 3,3'-disubstituted-binaphthyl alkynyl boron reagents for asymmetric conjugate addition of alkynyl groups to enones and 1,2-addition to aldehydes." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape7/PQDD_0006/NQ44782.pdf.

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9

Weisner, Andrew John. "SONOGASHIRA COUPLING ROUTES TO ortho-ALKYNYL- AND FUSED-RING SYDNONES." Wright State University / OhioLINK, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=wright1054924552.

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10

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.

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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.
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11

Lamberto, Massimiliano. "Thiol mediated radical cyclisations of isocyanides : synthesis of #NU# heterocycles." Thesis, University of Southampton, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.289909.

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12

Piotti, Marcelo Eduardo. "Metal catalyzed carbonylation of aziridines, alkynyl epoxides and alpha-allenic alcohols." Thesis, University of Ottawa (Canada), 1997. http://hdl.handle.net/10393/4528.

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This thesis describes the results obtained in the metal catalyzed carbonylation of aziridines, alkynyl oxiranes and $\alpha$-allenic alcohols. Aziridines undergo carbonylation and ring expansion when they are treated with catalytic amounts of Co$\sb2$(CO)$\sb8$ under 33 atm of carbon monoxide in ether solvents at 100$\sp\circ$C, to afford $\beta$-lactams in good to excellent yields. This reaction is applicable to aziridines containing alkyl or aryl groups at the ring carbons, and alkyl, aryl or acyl groups at the nitrogen atom. The reactions in most cases are regioselective, with carbon monoxide insertion occurring into the less substituted ring carbon-nitrogen bond. The carbonylation reaction is also stereoselective, giving trans-3,4-disubstituted $\beta$-lactams when cis-2,3-disubstituted aziridines are used, and vice versa. This stereoselectivity was maintained when fused bicyclic aziridines were subjected to carbonylation, affording the previously unknown trans-7-azabicyclo (4.2.0) otan-8-one derivatives. An X-ray study of one of these novel compounds reveals that the four membered ring contains structural features similar to those found in biologically active $\beta$-lactams, suggesting that these compounds might have considerable acylation power. The mechanism of the reaction involves nucleophilic ring opening of the aziridine ring by the in situ generated Co(CO)$\sb4\sp-$ anion. The carbonylation of aziridines is described in Chapter 2. Palladium (0) complexes catalyze the carbonylation of alkynyl oxiranes to 5-hydroxy-2,3-dienoates in the presence of 20 atm of carbon monoxide and methanol as the solvent. The reaction takes place under mild conditions (room temperature, one to two hours for complete conversion.) The mechanism involves the formation of a zwitterionic $\sigma$-allenylpalladium complex. When the carbonylation reaction is effected on alkynyl oxiranemethanol derivatives, partially saturated furan-3-ol compounds are obtained. These compounds are presumably formed by spontaneous cyclization of a nonisolable allenediol intermediate. Hydrofuran derivatives containing an exo or endo double bond are obtained depending on the substitution pattern of the initial epoxide. An interesting application of this reaction is the synthesis of a chiral furan-3-ol by carbonylation of a chiral epoxy alcohol obtained by Sharpless epoxidation. These results are described in Chapter 3. Chapter 4 describes the carbonylation of $\alpha$-allenic alcohols to $\alpha$-vinylacrylic acids catalyzed by a novel cationic aquo hydride palladium complex. The reaction requires the presence of catalytic amounts of p-toluenesulphonic acid and 20 atm of carbon monoxide to take place. This complex generates a palladium (0) species in situ, which is the active catalyst. The formation of a $\pi$-allylpalladium complex would be a key step in this reaction.
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13

Piotti, Marcelo Eduardo. "Metal catalyzed carbonylation of aziridines, alkynyl epoxides and Ã-allenic alcohols." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape16/PQDD_0013/NQ28368.pdf.

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14

Kodikara, Mahesh Sanjaya. "Computational Study of Structural and Optical Properties of Metal Alkynyl Complexes." Phd thesis, Canberra, ACT : The Australian National University, 2017. http://hdl.handle.net/1885/143293.

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The interaction of light with a nonlinear optical (NLO) material gives rise to new optical fields with altered properties (e.g. phase, frequency, amplitude, polarization, path, etc.), which are of utmost importance for photonic applications. The search for new efficient NLO materials for applications has thus been accelerated. In particular, interest in the NLO properties of organometallic systems has undergone enormous growth in the past decade. This thesis consists of a compilation of several papers relating to the experimental and density functional theory (DFT) studies of the nonlinear optical properties of metal alkynyl complexes. Paper 1 includes a brief introduction to nonlinear optical phenomena, in particular to the second-order NLO effects, and the popular experimental and quantum chemical methods for the determination of molecular first hyperpolarizability. It also includes a comprehensive review of previous semi empirical and DFT NLO calculations relating to organometallic complexes. Paper 2 deals with the benchmarking of DFT methods for first hyperpolarizabilities and excitation energies of metal alkynyls against the relevant experimental data. Papers 3-9 are combined experimental and computational (DFT) studies of dipolar (paper 3-8) and octupolar (paper 9) metal alkynyl complexes. The contribution from the calculations to each paper is as follows. In paper 3, linear optical and quadratic nonlinear optical properties of alkynyl complexes with different ligated metal centres (Ru, Ni, and Au) and with different bridges (phenylene, naphthalenylene, and anthracenylene) are calculated with DFT and time dependent DFT (TD-DFT). In paper 4, the linear optical and quadratic nonlinear optical properties of ruthenium alkynyl complexes with oligo(phenylenevinylene) bridges were calculated using DFT and the results compared with the experimental data. In paper 5, the experimentally determined linear optical properties and first hyperpolarizabilities of some ruthenium alkynyl complexes with yne/ene/azo inter-ring linkers are rationalized by DFT/TD-DFT calculations. In paper 6, the structural, linear optical, and nonlinear optical properties of ruthenium alkynyl complexes with P–P (= dppf, dppb, and dppe) and N–N (4,4’-di-tert-butyl-2,2’-bipyridine) donor co-ligands were rationalized from DFT calculations. Paper 7 consists of TD-DFT calculations undertaken on a series of bis(alkynyl) Ru complexes to rationalize the experimental linear optical data. In paper 8, the mechanism of two-dimensional NLO character in Y-shaped ruthenium alkynyl complexes is studied with the use of DFT/TD-DFT calculations. In paper 9, computational studies were undertaken to assign the key optical transitions for some octupolar compounds bearing (N-heterocyclic carbene) gold or diphenylamino substituents at the periphery.
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15

Cordonnier, Marie-Caroline A. "Palladium-catalysed cascade cyclisation of alkynyl silanes and studies towards rubriflordilactone A." Thesis, University of Oxford, 2011. http://ora.ox.ac.uk/objects/uuid:24302e85-de80-4562-a98e-ee0e6ba93862.

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In this work, a new methodology for the synthesis of a number of silylated bicyclic dienes has been reported. These bicyclic dienes allowed access to a variety of enones and phenols in 2 further steps. The stabilities and reactivities of different dialkylisopropoxy silanes have been evaluated,revealing relative instability of the dimethylisopropoxy silyl group towards chromatography. When using the analogous diethylisopropoxy silyl group instead, the products showed greater stability towards chromatography, however a higher temperature was necessary to oxidise the more sterically hindered silyl group to the desired hydroxyl moiety. A powerful cascade cyclisation for the synthesis of the CDE-core of rubriflordilactone A was then demonstrated and was successfully used for the synthesis of two systems, 284 and 333. The phenolic oxygen has been successfully installed by oxidation of a dialkylisopropoxy silane. The synthesis of these ring systems provides a solid foundation for the completion of the total synthesis of rubriflordilactone A. Finally the synthesis of suitable diynes 405 for the synthesis of the acyclic precursor of the cyclisation has been achieved. The stabilities of theses silanes towards a range of reaction have been demonstrated.
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16

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.

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17

Homma, Chihiro. "Development of Amine-Catalyzed Asymmetric Reactions of Aldehydes with Alkynyl Z-Ketimines." Doctoral thesis, Kyoto University, 2021. http://hdl.handle.net/2433/263497.

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18

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.

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19

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.

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20

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.

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21

Zani, Lorenzo. "Studies on the zinc mediated phenyl and alkynyl addition to carbon heteroatom double bonds." [S.l.] : [s.n.], 2006. http://deposit.ddb.de/cgi-bin/dokserv?idn=980571707.

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22

Sato, Takahiro. "Studies on Disilenes Bearing Alkynyl Groups and Unusual Reactivity of Overcrowded Silylene with Pyridines." 京都大学 (Kyoto University), 2012. http://hdl.handle.net/2433/157804.

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23

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.

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24

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.

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25

Toyoshima, Takeharu. "Synthesis of Oxindoles by Palladium Catalyzed Cyclization Reactions of 2-(Alkynyl)aryl Isocyanates with Nucleophiles." 京都大学 (Kyoto University), 2011. http://hdl.handle.net/2433/142568.

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26

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.

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27

Tahir, Muhammad Nazir [Verfasser], and Petra [Akademischer Betreuer] Mischnick. "Alkynyl ethers of dextrans as Intermediates for new Functional Biopolymers / Muhammad Nazir Tahir ; Betreuer: Petra Mischnick." Braunschweig : Technische Universität Braunschweig, 2011. http://d-nb.info/1175824887/34.

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28

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.

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29

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.

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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
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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.

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Rajagopal, Thivisa. "Synthesis of Single Isomer Trisubstituted Olefins from beta-chloro-alpha-iodo-alpha, beta-Unsaturated Esters and Alkynyl Esters." Thesis, University of Ottawa (Canada), 2010. http://hdl.handle.net/10393/28552.

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A convenient method to synthesize regiospecific and stereoselective trisubstituted olefins bearing three substitutents with various functionalities is disclosed. A unique olefin template such as (E)-beta-chloro-alpha-iodo-alpha,beta-unsaturated esters cross-couple with 9-alkyl-9-BBN to produce single isomer trisubstituted olefins using palladium-catalyzed Suzuki-Miyaura cross-coupling reaction. This methodology can be further expanded to introduce various alkyl groups at the beta-position. The mechanism is somewhat unusual as it involves two catalytic cycles with an allenoate intermediate to explain the observed stereochemistry and protonolysis of that intermediate produces the key product, (E)-beta-chloro-alpha,beta-unsaturated ester. The protonolysis is mediated by the presence of H2O in the inorganic base, K3PO4·H2O.* Similarly, another method has been developed to synthesize trisubstituted olefins using the alkynyl ester and 9-alkyl-9-BBN. This process also has a broad scope to introduce various alkyl groups at the beta-position. The mechanism currently proposed involves an oxidation of palladium to form H-[Pd]-OH species. This was confirmed based on the importance of water in the catalytic system and the isotopic experiments also confirmed the olefinic hydrogen at the alpha-position arises from the water itself. Following the formation of H-[Pd]-OH, syn carbopalladation to the alkynyl ester creates the hydroxyl palladium vinyl intermediate. However, this mechanism does not explain the observed stereochemistry. A more detailed study is required regarding this mechanism.* *Please refer to dissertation for diagrams.
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Lo, Wing-yin, and 盧詠妍. "Syntheses, characterization and emission studies of luminescent homo-and heterometallic clusters based on coinage metal alkynyl andchalcogenide core." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2004. http://hub.hku.hk/bib/B31245791.

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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.

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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.

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Calderone, Joseph Anthony III. "Borylations and Silylations of Alkenyl and Alkynyl Carbonyl Compounds Employing a Mild and Environmentally Friendly Cu(II) Catalyst." Thesis, Virginia Tech, 2014. http://hdl.handle.net/10919/47723.

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An environmentally friendly, operationally simple copper-amine catalyst system is disclosed. Using this catalyst system, electron deficient alkenes and alkynes with diverse functional groups are borylated and silylated in high yields and with short reaction times. In the case of electron deficient alkynes the identity of the electron withdrawing group controlled diastereoselectivity. Esters and amides exclusively form E-product, while aldehydes and ketones favor Z-product. Mechanistic insights into the catalytic cycle as well as origin of diastereoselectivity are discussed.
Master of Science
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36

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.

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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.

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[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.
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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.

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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.

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40

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.

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41

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.

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42

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.

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43

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.

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44

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.

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45

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.

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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
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46

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.

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47

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.

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48

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.

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49

Dassonneville, Benjamin [Verfasser]. "Synthesis of carbolines and analogues via rhodhium-catalyzed [2+2+2] cycloaddition with alkynyl-ynamides : Application to the total synthesis of alkaloids / Benjamin Dassonneville." Mainz : Universitätsbibliothek Mainz, 2013. http://d-nb.info/1033450871/34.

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50

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.

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