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Dissertations / Theses on the topic 'Synthesis of Thioureas'

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Published: 5 June 2025

Last updated: 1 August 2025

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1

Ngo, Thi Thuy Duong. "Chiral thioureas, thiourea-phosphines and amines derived from biomass : synthesis and applications in asymmetric organocatalysis." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLS476.

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Cette thèse porte sur la préparation de nouveaux catalyseurs chiraux à partir de composés naturels issus de la biomasse, et leurs applications en organocatalyse asymétrique. La première partie décrit la synthèse de thiourées énantiomériquement pures dérivées de l'isosorbide et l’isommanide. Ces thiourées ont été évaluées comme catalyseurs organiques dans des réactions asymétriques de Friedel-Crafts, d’alkylation, d’addition de type aza-Michael, d’hydroamination et de type Morita-Baylis-Hillman (MBH). Les meilleurs résultats en termes de réactivité et d’induction asymétrique, ont été obtenus da

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2

Wongkhan, Kittiya. "Synthesis and applications of palladium complexes : Part I. The synthesis, single crystal structures and liquid crystalline phase behavior of alkoxy substituted Tolans; Part II. Palladium-complexes of thioureas and phosphine sulfides." Thesis, Durham University, 2008. http://etheses.dur.ac.uk/2139/.

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Three series of alkoxy substituted tolans p-X-C(_6)H(_4)-C≡C-C(_6)H(_4)-p-OC(_n)H(_2n+1) [X = H (series 1), CH(_3) (series 2), OCH(_3) (series 3)] with varying chain length were synthesized by Pd/Cu-catalysed Sonogashira cross-coupling reactions of terminal alkynes and iodoarenes, crystal structures and phase behavior of three series of tolans. Twenty-eight of the tolans were structurally characterised by single-crystal X-ray diffraction. Their phase behavior was characterised by tplm; only the tolans in series 3 show liquid crystalline phases. The melting points of the tolans decrease with in

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3

Rampalakos, Konstantinos. "Asymmetric synthesis with vapol derivatives and novel chiral thiourea organocatalysts." Diss., Connect to online resource - MSU authorized users, 2008.

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4

Apps, James Frederick Shuan-Liang. "Synthesis and application of thiourea-S,S-dioxide derivatives." Thesis, University of Warwick, 2008. http://wrap.warwick.ac.uk/53126/.

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The structure and synthesis of N,N'-disubstituted thiourea-S,S-dioxides were investigated experimentally and computationally. Hydrogen peroxide oxidation of acyclic and cyclic N,N'-dialkylthioureas furnished S,S-dioxides in agreement with computational predictions. Some s,S,S-trioxides were also isolated. An X-ray crystallographic study of N,N'-diisopropylthiourea dioxide, fIrst synthesised in this work, verilled computational models. The prediction of a stable N,N'-diarylthiourea dioxide derivative was supported by successful isolation of the dioxide. The application of N,N'-diisopropylthiour

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5

Kyne, Graham M. "Rational design and synthesis of receptors for carboxylates." Thesis, University of Southampton, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.326397.

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6

Ghebregziabiher, Berhe Haile. "Synthesis of chiral thiourea ligands and their transition metal complexes." Thesis, Stellenbosch : Stellenbosch University, 2003. http://hdl.handle.net/10019.1/53610.

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Thesis (MSc)--Stellenbosch University, 2003.<br>ENGLISH ABSTRACT: Modification of chitosan with benzoylisothiocyanate was attempted, however due to solvent problem the study was left incomplete till appropriate solvent is designed. N,N-diethyl-N -camphanoylthiourea (HL8), N-piperidyl-N '-camphanoylthiourea (HL9), N-pyrrolidyl-N -camphanoylthiourea (HL10) and N,N-diethyl-N -adamantylcarbonyl thiourea (HL11)have been synthesised and characterised for the first time. Two of these ligands HL8 and HL11, were used to form a number of transition metal complexes, namely H30+{fae-[Co(L8-S,Obn, c

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7

Jones, Charlotte E. S. "Enantioselective homogeneous catalysts for the synthesis of fluorinated organic compounds." Thesis, University of St Andrews, 2011. http://hdl.handle.net/10023/2611.

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This thesis is divided into three main results chapters that reflect the path my research took. In the first results chapter, the first organocatalyst for the carbonyl-ene reaction was discovered and found to give high conversion using 1,3-bis(3,5-bis(trifluoromethyl)phenyl)thiourea. Various carbonyl and alkene precursors were examined in the ene reaction in both catalysed and uncatalysed reactions. It was found that ene reactions using fluoral and ethyl trifluoropyruvate give higher rates of reaction when compared to other carbonyl compounds. A novel enantiopure thiourea was synthesised and t

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8

Franklin, Constance D. "A Novel Synthesis and Subsequent Decyclization of Iminothiozolidinones: Expansion of Thiourea Chemistry for Biological Applications." VCU Scholars Compass, 2017. http://scholarscompass.vcu.edu/etd/4853.

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Small molecule synthesis has become a valuable tool in the study of biological systems. Biologically active compounds can be designed based on well-characterized endogenous systems or they can be found through the screening of large libraries of small molecules. This work involves the development of a small library of cyclic thiourea-based small molecules by use of an unreported synthetic pathway. Briefly, parent thioureas were cyclized by reaction with bromoacetyl bromide, and one or two isomeric heterocycles were found to form. Further studies indicated that the reaction could be easily mani

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9

Saglam, Guluzar. "Synthesis Of Novel Chiral Thiourea Derivatives And Their Applications, Synthesis Of Some Hdac Inhibitors, Addition Of Acyl Phosphonates To Ethylcyanoformate." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/3/12609265/index.pdf.

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The thiourea derivatives have become a main focus of research in asymmetric synthesis as an organocatalyst in recent years. In the first part, the thiourea catalysts are synthesized starting from easily available L-tartaric acid and application of the catalysts to some addition reactions showed no significant asymmetric induction. A number of HDAC inhibitors have been developed as anti-cancer agent at the present time.In the second part, some aryl butenoic acid derivatives are synthesized as HDAC inhibitors starting from substituted benzaldehyde and pyruvic acid. The HDAC activity studies sho

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10

Chandanshive, Jay Zumbar <1983&gt. "Regiocontrolled Synthesis of Pyrazole Derivatives Through 1,3-Dipolar Cycloaddition Reaction And Synthesis of Helicene-Thiourea based and Polymer Supported Soos's Catalyst for Asymmetric Synthesis." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amsdottorato.unibo.it/5826/1/Chandanshive_JAY_ZUMBAR_Thesis.pdf.

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In first part we have developed a simple regiocontrolled protocol of 1,3-DC to get ring fused pyrazole derivatives. These pyrazole derivatives were synthesized using 1,3-DC between nitrile imine and various dipolarophiles such as alkynes, cyclic α,β-ketones, lactones, thiocatones and lactums. The reactions were found to be highly regiospecific. In second part we have discussed about helicene, its properties, synthesis and applications as asymmetric catalyst.Due to inherent chirality, herein we have made an attempt to synthesize the helicene-thiourea based catalyst for asymmetric catalysi

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11

Chandanshive, Jay Zumbar <1983&gt. "Regiocontrolled Synthesis of Pyrazole Derivatives Through 1,3-Dipolar Cycloaddition Reaction And Synthesis of Helicene-Thiourea based and Polymer Supported Soos's Catalyst for Asymmetric Synthesis." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amsdottorato.unibo.it/5826/.

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In first part we have developed a simple regiocontrolled protocol of 1,3-DC to get ring fused pyrazole derivatives. These pyrazole derivatives were synthesized using 1,3-DC between nitrile imine and various dipolarophiles such as alkynes, cyclic α,β-ketones, lactones, thiocatones and lactums. The reactions were found to be highly regiospecific. In second part we have discussed about helicene, its properties, synthesis and applications as asymmetric catalyst.Due to inherent chirality, herein we have made an attempt to synthesize the helicene-thiourea based catalyst for asymmetric catalysi

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12

Yang, Die Daisy. "Development of polymers for electroplating waste water purification, polymer-supported reagents for organic synthesis and heterogeneous catalysts for aerobic alcohol oxidation reactions." Click to view the E-thesis via HKUTO, 2008. http://sunzi.lib.hku.hk/hkuto/record/B39848887.

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13

Al-Riyahee, Ali. "An exploration of the synthesis, coordination chemistry and properties of novel thiourea ligands and their complexes." Thesis, Cardiff University, 2016. http://orca.cf.ac.uk/94404/.

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In order to highlight the presentation of this thesis and to provide more detailed investigations, the thesis was separated into five chapters according to the sequence of work. Chapter One: This chapter gives an overview of the coordination chemistry of different metal complexes focusing on Cr(III), Ni(II), Cu(II), and Zn(II) ions with common, uncommon, rare ligands and their geometric preferences. A brief introduction to magnetic susceptibility and their magnetic properties are also discussed. The cyclic voltammogram and the various types of redox processes are explained. Different electroni

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14

Kucukdisli, Murat. "Asymmetric Synthesis Of Chiral Camphor Fused Pyridine Type Novel Organocatalysts." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/12610790/index.pdf.

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Chiral pyridines as organocatalysts have been used in asymmetric organic synthesis in recent years. The asymmetric synthesis of camphor fused pyridine type novel organocatalysts were perfomed starting from cheap and easily available natural (+)-camphor. Using camphor fused pyridine skeleton, six organocatalysts 29, 32, 33, 38, 40, and 41were successfully synthesized. The first four nucleophilic and Lewis base catalysts 29, 32, and 33 are different P-oxides and P,N-dioxides which were tested in allylation of aldehydes via allyltrichlorosilane. L-proline amide 38 and D-proline amide 40 can be n

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15

Ortayli, Oytun. "Asymmetric Synthesis Of 1,4-diamine Based Chiral Ligand And Organocatalyst And Their Applications." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612335/index.pdf.

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Novel 1,4-chiral diamine ligand possessing a trans-9,10-dihydro-9,10-ethanoanthracene backbone was synthesized. The synthetic plan involves first LiAlH4 reduction of the Diels-Alder adduct obtained by reaction of dimenthyl fumarate and anthracene, which is followed by reacting the corresponding alcohol and subsequent attachment of mesylate and triflate units to get good leaving groups which are available substances for introducing nitrogen units via SN2 type reactions. Consequently, by using dimesyl ester and ditriflate esters five catalysts 27, 29, 30, 33 and 38 were synthesized. The first fo

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16

Nikjoo, Dariush. "Design and Synthesis of a Small Set of Thiourea-based Compounds as Inhibitors of AChE1 from Mosquitoes." Thesis, Umeå universitet, Kemiska institutionen, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-92551.

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17

MARTINS, ELAINE A. J. "Sintese e caracterizacao de sulfetos metalicos em baixas temperaturas por reacao solido-solido utilizando-se gerador de sulfeto." reponame:Repositório Institucional do IPEN, 2002. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11009.

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Made available in DSpace on 2014-10-09T12:46:52Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T13:58:05Z (GMT). No. of bitstreams: 1 08512.pdf: 4971310 bytes, checksum: 6e08f69ed4ae0331760f78b901cc4142 (MD5)<br>Tese (Doutoramento)<br>IPEN/T<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP

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18

Yang, Die Daisy, and 楊蝶. "Development of polymers for electroplating waste water purification, polymer-supported reagents for organic synthesis and heterogeneouscatalysts for aerobic alcohol oxidation reactions." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2008. http://hub.hku.hk/bib/B39848887.

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19

Kong, Julie. "Design, synthesis and applications of new chiral bifunctional iminophosphorane - thiourea organocatalysts. Organophotocatalytic addition of unactivated alkenes with silicon enolate." Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPASF018.

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Ce travail de thèse porte sur le développement de nouveaux organocatalyseurs chiraux bifonctionnels et leurs applications en organocatalyse asymétrique. Pour ce faire, nous avons d'abord étudié la conception et la synthèse de nouveaux organocatalyseurs chiraux possédant une fonction iminophosphorane, d'une part et une fonction donneuse de liaison hydrogène, d'autre part. Ainsi, plusieurs familles d'organocatalyseurs chiraux bifonctionnels à base de L-proline et d'acide (S)-pyroglutamique ont été synthétisées en quelques étapes avec des rendements globaux modérés à bons. Ces nouveaux catalyseur

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20

Lin, Wing-shan, and 林穎珊. "Synthesis and biological studies of anti-cancer rhodium(II, II) carboxylates, anti-inflammatory silver(I) thiourea and microbially fabricated silver nanoparticles." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2014. http://hdl.handle.net/10722/206649.

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Discovery of cisplatin as an effective anticancer agent has stimulated the development of metal based medicine. The recent advances in research on platinum, ruthenium and gold complexes have received much attention in medicinal chemistry, and studies of other less explored metal complexes may reveal alternative mode of mechanism as novel therapeutic agents. A series of dirhodium(II,II) complexes with carboxylate and carboxamidate ligands and thiourea complexes of coinage metals have been prepared in this study. Their biological activities and mechanisms of action have been studied. Dirhodiu

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21

Besaans, Ethan Wade. "Synthesis structure-activity relationships and biological evaluation of optimised terminally alkylated (bis)urea and (bis)thiourea polyamine analogues as antiplasmodial agents." Diss., University of Pretoria, 2017. http://hdl.handle.net/2263/63227.

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The sustained control and elimination of malaria requires novel approaches to combat the emergence of drug resistance. Plasmodium falciparum causes the most lethal form of human malaria. Current therapeutics have shown decreased efficacy as a result of P. falciparum developing resistance to them. Consequently, novel antimalarial agents with new mechanisms of action are urgently needed to aid in the control and ultimate eradication of this disease and should display low resistance indices and high selectivity indices. Polyamines are involved in a variety of cellular functions including c

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22

Chassillan, Louis. "New Chiral Bifunctional Organocatalysts : Synthesis and Application in Enantioselective Reactions Under Batch and Continuous-Flow Conditions." Thesis, université Paris-Saclay, 2022. http://www.theses.fr/2022UPASF027.

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Au cours des dernières années, l’organocatalyse asymétrique a connu un engouement sans précédent et de nombreux catalyseurs organiques ont été synthétisés dans le but d’effectuer des réactions plus rapides et plus sélectives. Cependant, étant donné la demande croissante de molécules chirales dans l’industrie, il demeure crucial de développer de nouveaux outils afin de rendre leur production plus efficace. Pour ce faire, l’utilisation de la catalyse bifonctionnelle apparait comme une évidence du fait de sa capacité à activer simultanément le nucléophile et l’électrophile et ainsi permettre un m

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23

Guillon, Emmanuel. "Synthese, etude structurale et proprietes redox de complexes de cuivre, nickel et cobalt avec des ligands bidentes derives de la thiouree." Reims, 1996. http://www.theses.fr/1996REIMS025.

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Ce travail porte sur la synthese et la coordination de ligands bidentes, les n,n-disubstitues, n'-benzoyl ou n'-ethoxycarbonyl thiocarbamides (atomes donneurs s et o) ou n-(n",n"-disubstitue-aminothiocarbonyl)-n'-substituees benzamidines (atomes donneurs s et n), avec le cuivre, le nickel et le cobalt. L'objectif est de preciser les facteurs favorisant l'obtention de complexes metalliques a des degres d'oxydation non usuels: geometrie, encombrement sterique, effet electronique, nature de l'atome donneur,. . . Les spectroscopies infrarouge, electronique et les mesures de magnetisme indiquent qu

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24

Venin, Claire. "Synthèse en parallèle d’hétérocycles dérivés de séquences dipeptidiques et profil d’activité inhibitrice sur les phospholipases A2 sécrétées." Thesis, Bordeaux 1, 2013. http://www.theses.fr/2013BOR14855/document.

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Le squelette 1,3,5-triazépane-2,6-dione est un hétérocycle à sept chainons dérivé de dipeptides et accessible en quatre étapes en solution. Une voie de synthèse en parallèle sur support solide de cet hétérocycle a été élaborée. Cette synthèse, qui repose sur les principes de "catch and release" et de cyclo-clivage, a permis la création d’une chimiothèque de plus d’une centaine de composés. Pour augmenter la diversité du squelette 1,3,5-triazépane-2,6-dione, des modifications post-cyclisation peuvent avoir lieu telles que des réactions de N-mono-alkylation ou de N,N-di-alkylation de l’urée, des

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25

ALARCON, KARINE. "Synthese et etudes d'heterodimeres specifiques des sites abasiques de l'adn - potentialisation d'agents alkylants anticancereux." Université Joseph Fourier (Grenoble), 2000. http://www.theses.fr/2000GRE10038.

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Ce travail s'inscrit dans un programme de reconnaissance specifique par des composes de synthese d'une des lesions majeures de l'adn : le site abasique. Ce manuscrit traite essentiellement de la synthese modulaire permettant d'acceder a une large serie de composes susceptibles de potentialiser l'action d'agents anticancereux alkylants (ex : le bcnu). Ces molecules comportent un intercalant (acridine ou naphtalimide) qui sert de vecteur vis-a-vis de l'adn, une base nucleique (la 2,6-diaminopurine) qui reconnait le site abasique et une chaine de jonction fixee en differents points sur la base et

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26

Saxena, Aakarsh. "Synthesis and characterization of copper(I) halide and nitrate complexes of heterocyclic thioureas /." 2008. http://hdl.handle.net/10288/480.

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27

Maddani, Mahagundappa R. "Chemistry Of Molybdenum Xanthate [Mo02(Et2NCS2)] : Applications In Organic Synthesis." Thesis, 2009. https://etd.iisc.ac.in/handle/2005/1000.

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The thesis entitled ‘Chemistry of molybdenum xanthate (MoO2[Et2NCS2]2): Applications in organic synthesis’ is presented in 4 chapters. Molybdenum (IV and VI) oxo-complexes are the subject of significant interest due to their functional and structural similarities with several molybdo-enzymes.1 Literature survey suggests that, molybdenum (VI as well as IV) xanthate2 1 resembles the active sites of various molybdo-enzymes. Therefore, in the present thesis, we are presenting our attempts directed towards exploiting molybdenum xanthate 1 in developing various useful methodologies. Figure 1:

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28

Maddani, Mahagundappa R. "Chemistry Of Molybdenum Xanthate [Mo02(Et2NCS2)] : Applications In Organic Synthesis." Thesis, 2009. http://hdl.handle.net/2005/1000.

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The thesis entitled ‘Chemistry of molybdenum xanthate (MoO2[Et2NCS2]2): Applications in organic synthesis’ is presented in 4 chapters. Molybdenum (IV and VI) oxo-complexes are the subject of significant interest due to their functional and structural similarities with several molybdo-enzymes.1 Literature survey suggests that, molybdenum (VI as well as IV) xanthate2 1 resembles the active sites of various molybdo-enzymes. Therefore, in the present thesis, we are presenting our attempts directed towards exploiting molybdenum xanthate 1 in developing various useful methodologies. Figure 1: Mo

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29

Ziegler, Robert. "Development of an enantioselective alkaloid addition to pyrones and studies towards the total synthesis of vinylallene natural products." Thesis, 2016. https://hdl.handle.net/2144/14556.

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Pleiomaltinine is an alkaloid-pyrone natural product that was the first of its kind to be isolated in nature. Synthesis of this compound from pleiocarpamine and a reactive quinone methide-like pyrone is described. Furthermore, model compounds have been made that will allow for full testing of this new heterocycle’s biological properties. This process has also been rendered enantioselective using asymmetric organocatalysis with thioureas. Additionally, work has been conducted towards the total synthesis of vinylallene-derived natural products. Progress towards the syntheses of chloropupukeanani

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30

LI, WEN-JIE, and 李文杰. "1. Magnetic nanoparticle-supported organocatalyst for Michael reactions2. Synthesis of pyrrolidine–thiourea organocatalysts." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/29466435292989436516.

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碩士<br>國立中正大學<br>化學暨生物化學研究所<br>102<br>1.Magnetic nanoparticle-supported Hayashi catalyst was prepared and used as magnetically recoverable and reusable catalyst for Michael reaction. 2.A serious of bifunctional amine-thiourea catalysts were prepared and applied to the Michael and Michael-Henrys reaction. 3.A bifunctional primary aminothiourea catalyst was prepared and applied to Aza-Diels-Alder reaction with high yield and ee values. The selectivity of enantiomers was vary by different additive.

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31

Guan, Qiao-Zhi, and 官巧之. "Synthesis of Chiral Isoxazole Derivatives Employing Bifunctional Thiourea Organocatalyst and 1,5-difluoro-2,4-dinitrobenzene." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/04658731297954677104.

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碩士<br>國立臺灣師範大學<br>化學系<br>99<br>This thesis deals with the synthesis of biologically active chiral bicyclic isoxazole and isoxazoline derivatives. The synthetic methodology involves two steps. In the first step, β-nitrostyrene derivatives were treated with allyl or propargyl malonates in the presence of chiral bifunctional thiourea catalyst to obtain the corresponding optically active Michael adducts. The resultant chiral Michael adducts were treated with DBU and 1,5-difluoro-2,4-dinitrobenzene (DFDNB) to generate nitrile oxides in situ. The nitrile oxide intermediates underwent intramolecular

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32

Seidel, Sabine N. [Verfasser]. "Syntheses, structures, and reactions of chiral rhenium containing amines, ureas, and thioureas / vorgelegt von Sabine N. Seidel." 2009. http://d-nb.info/994948115/34.

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33

PUGLISI, ANTONIO. "Quinones in asymmetric arylation and biaryl coupling." Doctoral thesis, 2017. http://hdl.handle.net/11573/1062383.

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Quinones are widespread compounds in nature, where they play key roles due to their biological activity. Quinones have proven their usefulness in the field of synthetic chemistry, being excellent oxidants and electrophiles. In this thesis work, two example of efficient exploitment of quinones as electrophiles are presented. In one case, an asymmetric organocatalyzed biaryl couling is presented, a reaction which proceeds with the addition of a nucleophilic naphthol to a substituted electrophilic quinone, followed by rearomatization of the quinone. The reaction is catalyzed by Cinchona alkaloids

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34

Wan-yu, Lin, and 林宛諭. "Synthesis Chiral Isoxazole Derivatives via 1,3-dipolar Cycloaddition from Michael Adducts by Using Difucntional Thiourea an Organocatalyst." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/90147113050256226100.

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碩士<br>國立臺灣師範大學<br>化學系<br>100<br>Isoxazole and isoxazoline derivatives are common and can be found in the nature compounds. The isoxazole derivatives structure are stable and facilitate for variety synthesis as intermediates. In medical system, enantiomeric isoxazole and isoxazoline are used in therapeutic process. Therefore, it becomes major tasks for synthesis enantiomeric isoxazole and isoxazoline. We have recently prepared nitrostyrene and dimethyl allyl malonate (and dimethyl propargyl malonate) with additive chiral bifunctional thiourea for 1,4-Michael addition. With H-bonding, the thiour

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35

Lethobane, Manthako Hycinth. "The synthesis and characterization of ZnS nanoparticles from zinc-based thiourea derivative complexes for potential use in photocatalysis." Thesis, 2017. https://hdl.handle.net/10539/25002.

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A dissertation submitted to the Faculty of Science, University of the Witwatersrand in partial fulfilment of the requirement for the degree Master of Science (M.Sc.) in Chemistry. Johannesburg, 31 October 2017.<br>Nanotechnology has been instrumental in finding strategies of combating some of the world’s grand challenges. Water scarcity and the growing industrialization have made it an imperative to find ways of cleaning water. Photocatalysis is a promising method for water purification personified by the use of solar energy as well as nanomaterials with tailored properties. Colloidal synthes

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36

Morifi, E. L. "Cobalt and cadmium chalcogenide nanomaterials from complexes based on thiourea, urea and their alkyl derivatives : synthesis and characterization." Thesis, 2015. http://hdl.handle.net/10352/302.

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M. Tech. (Department of Chemistry, Faculty of Applied and Computer Science), Vaal University of Technology<br>Cadmium and cobalt complexes of urea and thiourea were synthesized using ethanol as a solvent. All complexes were refluxed at 70 - 80 °C, left to cool at room temperature, washed with methanol and acetone to remove impurities and dried at an open environment. The characterization of complexes was done using FTIR spectroscopy, elemental analysis and TGA. The complexes were found to coordination with the ligands through sulphur and oxygen atoms to the metal, instead of nitrogen. These we

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37

Lin, Wei-Chi, and 林威奇. "Part 1. A new selective colorimetric and fluorescent sensor for Hg2+ and Cu2+ based on a thiourea featuring a pyrene unit.Part 2. Synthesis an alanine-based colorimetric chemosensor and enantioselective recognition for malate and aspartate." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/45917019186471158777.

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碩士<br>靜宜大學<br>應用化學研究所<br>99<br>part 1. A new artificial receptor 1 was developed, and its chromogenic and fluorogenic behaviors toward various metal ions were investigated. Receptor 1 shows exclusively responses toward Hg2+ and Cu2+ ions. It selectively senses Hg2+ and Cu2+ ions through two different color changes in aqueous solution (DMSO/H2O = 4/1) and also distinguishes them from other metal ions. In addition, receptor 1 also exhibits pronounced enhancements of the fluorescence, which can visually be discernible by an orchid fluorescence in the presence of Hg2+ ions and a strong blue fluore

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