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The bis 1,4,7-trithiacyclononane (1,4,7-TTCN) complexes of iron, cobalt, nickel and copper are reported in this work. Their properties have been examined using computer-controlled electrochemical and spectroscopic techniques. These TTCN complexes form readily, are unusually symmetrical and support electron transfer reactions at the metal center. The cobalt(II) complex is octahedral, low spin and symmetrical. Four oxidation states of cobalt-TTCN complex are observed; two one-electron transfer processes are reversible. Copper (II) bis 1,4,7-TTCN is unusually symmetrical evidenced by both solid phase and ambient temperature aqueous phase electron paramagnetic resonance spectra. An unusually high redox potential for the copper complex indicates extraordinary stability of the Cu(I) oxidation state but evidently not at the expense of Cu(II) stability. The complex also has a high formation constant compared to other copper-thioether complexes. This unusual strength of thioether donor is attributed to ligand geometry. The 1,4,7-TTCN molecule is the only known cyclic polythioether to have all sulfur atoms endodentate. This structure contributes to thermodynamic stability of complexes as the ground state configuration of the free ligand is maintained in the complex.

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Ho Chak Ming. / Thesis (M.Phil.)--Chinese University of Hong Kong, 1994. / Includes bibliographical references (leaves 122-126). / Acknowledgment --- p.i / Table of contents --- p.ii / List of figures --- p.iv / List of tables --- p.v / Abstract --- p.ix / Chapter Part I --- Determination of sulphide / General introduction --- p.1 / Spectrophotometric determination of sulphide --- p.5 / Chapter 1. --- Introduction --- p.5 / Chapter A. --- Review of the reported methods for the determination of sulphide --- p.5 / Chapter B. --- General description of the proposed method --- p.13 / Chapter 2. --- Experimental section --- p.18 / Chapter A. --- Preservation of samples --- p.18 / Chapter B. --- Sample pre-treatment --- p.19 / Chapter C. --- Separation/preconcentration of sulphide --- p.19 / Chapter D. --- Spectrophotometric determination of sulphide by proposed method --- p.24 / Chapter E. --- Spectrophotometric determination of sulphide by standard methylene blue method as the counter-check method --- p.32 / Chapter 3. --- Results and discussions --- p.34 / Chapter A. --- Optimization of the proposed spectrophotometric method --- p.34 / Chapter B. --- Optimization of the separation/preconcentration methods --- p.45 / Chapter C. --- Construction of the calibration graph for the spectrophotometric determination of sulphide and determination of the molar absorptivity coefficient --- p.53 / Chapter D. --- Precision and detection limit of the proposed spectrophotometric method --- p.54 / Chapter E. --- Interferences studies of the proposed method --- p.56 / Chapter F. --- Spectrophotometric determination of sulphide in water --- p.60 / Chapter G. --- Spectrophotometric determination of sulphide in beers --- p.63 / Chapter H. --- Spectrophotometric determination of sulphide in orange juices --- p.66 / Chapter 4. --- Conclusions --- p.68 / References --- p.70 / Chapter Part II --- Determination of fluoride / General introduction --- p.75 / Spectrophotometric determination of fluoride --- p.78 / Chapter 1. --- Introduction --- p.78 / Chapter A. --- Review of the reported methods for the determination of fluoride --- p.78 / Chapter B. --- General description of the proposed scheme for the spectrophotometric determination of fluoride in animal feeds --- p.84 / Chapter 2. --- Experimental Section --- p.87 / Chapter A. --- Ashing of the animal feed samples --- p.87 / Chapter B. --- Reduction of interferences in the ashed sample solutions using anion exchange resin --- p.89 / Chapter C. --- Preparation of solutions for the calibration graph and the ashed sample solutions for the spectrophotometric measurement --- p.90 / Chapter D. --- Spectrophotometric determination of fluoride in the ashed samples --- p.92 / Chapter E. --- Potentiometric determination of fluoride in the ashed sample solutions by the FISE method as the counter-check method --- p.93 / Chapter 3. --- Results and discussions --- p.94 / Chapter A. --- Ashing conditions of the animal feed samples --- p.94 / Chapter B. --- Removal of the interferences in the ashed sample solutions --- p.99 / Chapter C. --- Construction of the calibration graph for the spectrophotometric determination of fluoride --- p.112 / Chapter D. --- Precision of the spectrophotometric method --- p.113 / Chapter E. --- Spectrophotometric determination of fluoride in animal feeds --- p.114 / Chapter F. --- Potentiometric determination of fluoride in animal feeds by the FISE method as the counter-check method --- p.117 / Chapter 4. --- Conclusions --- p.120 / References --- p.122

Ho-Fai Lee. / Thesis (M.Phil.)--Chinese University of Hong Kong, 1999. / Includes bibliographical references (leaves 90-91). / Abstracts in English and Chinese. / Acknowledgements --- p.i / Abbreviations --- p.ii / Abstract --- p.iii / Chapter Part I. --- Chemoselective and Oxo-Controlled S-Oxidation of Sulfides Containing Pyridine Rings and Olefinic Double Bonds / Chapter 1.1. --- Introduction --- p.2 / Chapter 1.2. --- Results and Discussion --- p.5 / Chapter 1.3. --- Conclusion --- p.14 / Chapter 1.4. --- Experimental --- p.15 / Chapter 1.5. --- References --- p.32 / Chapter Part II. --- Directed Synthesis of all-Homocalix[n]arenes with Various Cavity Sizes / Chapter II. 1. --- Introduction --- p.35 / Chapter II.2. --- Previous Synthetic Routes for all-Homocalixarenes --- p.37 / Chapter II.3. --- Synthetic Plan --- p.39 / Chapter II.4. --- Results and Discussion --- p.41 / Chapter II.5. --- Conclusion --- p.55 / Chapter II.6. --- Experimental --- p.56 / Chapter II.7. --- References --- p.90 / Chapter Appendix --- 1H and 13C NMR Spectra / List of and 13C NMR Spectra of Part I --- p.92 / 1Hand 13C NMR Spectra of Part I --- p.93 / List of 1H and 13C NMR Spectra of Part II --- p.100 / 1H and 13C NMR Spectra of Part II --- p.102

by Wang Yu = 一維納米結構硫化鎘的生長和表面 / 王瑜. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2005. / Includes bibliographical references. / Text in English; abstracts in English and Chinese. / by Wang Yu = Yi wei na mi jie gou liu hua ge de sheng chang he biao mian / Wang Yu. / Acknowledgements --- p.i / Abstract --- p.ii / 摘要 --- p.iii / Table of contents --- p.iv / List of figures --- p.vi / List of tables --- p.ix / Chapter Chapter 1 --- Introduction / Chapter 1.1 --- Background --- p.1-1 / Chapter 1.1.1 --- One-dimensional (1 -D) nanostructures --- p.1-1 / Chapter 1.1.2 --- "Characteristics, properties, and applications of 1 -D nanostructures" --- p.1-1 / Chapter 1.1.3 --- Synthesis and growth mechanisms --- p.1-3 / Chapter 1.1.3.1 --- Vapor-Liquid-Solid (VLS) mechanism --- p.1-4 / Chapter 1.1.3.2 --- Vapor-Solid (VS) mechanism --- p.1-5 / Chapter 1.2 --- II-VI semiconductor nanomaterials --- p.1-5 / Chapter 1.2.1 --- Cadmium sulfide (CdS) --- p.1-6 / Chapter 1.2.1.1 --- Characteristics and potential applications --- p.1-6 / Chapter 1.2.1.2 --- Works performed by others --- p.1-7 / Chapter 1.3 --- Objectives and approaches in this work --- p.1-8 / Chapter 1.4 --- Thesis layout --- p.1-9 / References --- p.1-10 / Figures --- p.1-13 / Tables --- p.1-14 / Chapter Chapter2 --- Methodology and instrumentation / Chapter 2.1 --- Experimental setup --- p.2-1 / Chapter 2.1.1 --- Substrates --- p.2-1 / Chapter 2.1.2 --- Experimental settings --- p.2-2 / Chapter 2.2 --- Growth parameters --- p.2-2 / Chapter 2.3 --- Characterization methods --- p.2-3 / Chapter 2.3.1 --- "Phase, morphology and microstructure analysis" --- p.2-3 / Chapter 2.3.1.1 --- X-ray diffractometry (XRD) --- p.2-3 / Chapter 2.3.1.2 --- Scanning electron microscopy (SEM) --- p.2-4 / Chapter 2.3.1.3 --- Transmission electron microscopy (TEM) --- p.2-4 / Chapter 2.3.1.4 --- High-resolution transmission electron microscopy (HRTEM) / Chapter 2.3.2 --- Cathodoluminescence (CL) --- p.2-5 / Chapter 2.3.2.1 --- Principles of CL --- p.2-5 / Chapter 2.3.2.2 --- Advantages of CL --- p.2-6 / Chapter 2.3.2.3 --- CL settings --- p.2-6 / References --- p.2-7 / Figures --- p.2-8 / Chapter Chapter3 --- Results and discussions part I - Growth of CdS nanobelts / Chapter 3.1 --- Characterization in general --- p.3-1 / Chapter 3.2 --- Morphology and microstructure --- p.3-1 / Chapter 3.2.1 --- Nanobelt with Au droplet at the tip --- p.3-2 / Chapter 3.2.2 --- Nanobelt without Au droplet at the tip --- p.3-2 / Chapter 3.3 --- Effect of Au catalyst --- p.3-3 / Chapter 3.4 --- Growth models --- p.3-3 / Chapter 3.5 --- Samples sintered at different temperatures --- p.3-5 / Chapter 3.6 --- Samples at different deposition zones --- p.3-6 / Chapter 3.7 --- Cathodoluminescence --- p.3-6 / Chapter 3.7.1 --- Blue shift in the deep level emission --- p.3-7 / Chapter 3.7.2 --- Intensity of the emission --- p.3-8 / References --- p.3-10 / Figures --- p.3-11 / Tables --- p.3-24 / Chapter Chapter4 --- Results and discussions part II - Asymmetric growth on the CdS ribbons / Chapter 4.1 --- Surface polarization --- p.4-1 / Chapter 4.2 --- One sided saw-teeth ribbons --- p.4-2 / Chapter 4.3 --- Two-sided comb-like ribbons --- p.4-3 / Chapter 4.4 --- Growth models for the asymmetric growth --- p.4-5 / References --- p.4-7 / Figures --- p.4-8 / Chapter Chapter5 --- Conclusions and future studies / Chapter 5.1 --- Conclusions --- p.5-1 / Chapter 5.2 --- Future studies --- p.5-2 / References --- p.5-4