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Dissertations / Theses on the topic 'Benzoxazole'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Dick, Priscila Franken. "Síntese e estudo fotofísico de marcadores moleculares fluorescentes para bicamadas lipídicas." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2012. http://hdl.handle.net/10183/69836.

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Este trabalho apresenta a síntese, caracterização e estudo fotofísico de novos heterociclos benzazólicos fluorescentes com potencial aplicação como sondas de ambientes lipídicos. Para isso, foram sintetizados três corantes que contêm em sua estrutura cadeias alquílicas de oito, doze e dezoito átomos de carbono ligados a um núcleo benzazólico que é o responsável pela fluorescência destes compostos. O corante que possui a cadeia alquílica de dezoito carbonos apresenta-se ainda na forma de um sal de amônio quaternário, com o objetivo de tornar a sua estrutura mais anfifílica do que os seus análog

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2

Kleinhans, Dewald Johannes. "Studies in the synthesis of benzoxazole compounds." Thesis, Stellenbosch : Stellenbosch University, 2015. http://hdl.handle.net/10019.1/97900.

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Thesis (PhD)--Stellenbosch University, 2015.<br>ENGLISH ABSTRACT: Benzoxazoles are an important class of π-electron-excessive, benzene-fused heterocyclic compounds found in natural products and display a wide range of pharmacological applications. It is therefore a widely used starting scaffold for drug and agrochemical discovery programs. Other applications include: chiral auxiliaries in asymmetric reactions, chiral receptors for the resolution of racemic mixtures, fluorescent whitening dyes, various photochromic materials and as ligands for a wide range of catalytic reactions. Due to ou

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3

Khamvongsa, Bryan. "Molecular control of liquid crystalline orientation of poly(2,6-benzoxazole)." Thesis, Georgia Institute of Technology, 1993. http://hdl.handle.net/1853/8567.

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4

Park, Joonwon. "Synthesis and molecular control of star-like poly-2,4-benzoxazole." Thesis, Georgia Institute of Technology, 1992. http://hdl.handle.net/1853/8656.

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5

Avant, Lavern Marshall. "Synthesis and characterization of a cross-digitated poly (2,5-Benzoxazole) (ABPBO)." Thesis, Georgia Institute of Technology, 1995. http://hdl.handle.net/1853/8464.

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6

Slaybaugh, Amy. "Structure-Property Relationships In PAEs Prepared From 2-(2,4-difluorophenyl)benzoxazole Derivatives." Wright State University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=wright1526553989709853.

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7

Sun, Weiquan. "Multi-mode-driven molecular shuttles : photochemically and chemically reactive benzoxazole-containing rotaxanes." Thesis, University of Edinburgh, 2008. http://hdl.handle.net/1842/11437.

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Chapter Two describes the use of intercomponent interactions between the benzoxazole-containing motif in the thread and the benzylic amide macrocycle which provides an accessible and efficient method for the synthesis of a model <i>E</i>-[2]rotaxane. Irradiation of this <i>E</i>-isomer produces the corresponding <i>Z</i>-[2]rotaxane, in which the maximum number of intercomponent hydrogen bonds changes from four (<i>E</i>) to two (<i>Z</i>), considerably reducing the binding strength between the thread and the macrocycle. Lying in the macrocycle discrimination between the ‘matched’ (<i>E</i>) a

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8

PIERSANTI, LUCA. "Nuovi chemosensori ottici aventi un derivato benzossazolico come unità sensibile." Doctoral thesis, Urbino, 2015. http://hdl.handle.net/11576/2628889.

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9

Bi, Xiaoman bi. "Synthesis and Characterization of Novel Fluorescent Sensors Based on Terpyridine, Benzoxazole and Benzothiazole Chromophores." University of Akron / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1512743963248758.

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10

Hoang, Huong. "Hydroquinone-based Poly(arylene ether)s with Pendent Benzothiazole Or Benzoxazole and 3-sulfonated Phenyl Sulfonyl Groups for Use as Proton Exchange Membranes." Wright State University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=wright1376481513.

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11

Kemboi, Abraham K. "Design and Application of Facile Routes to N-Heterocycle Functionalized Poly(arylene ether)s." Wright State University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=wright1464120801.

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12

Njaria, Paul Magutu. "Antimycobacterial 2-aminoquinazolinones and benzoxazole-based oximes: synthesis, biological evaluation, physicochemical profiling and supramolecular derivatization." Doctoral thesis, University of Cape Town, 2017. http://hdl.handle.net/11427/26954.

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Tuberculosis (TB) is a life-threatening infectious disease caused by Mycobacterium tuberculosis (Mtb). Globally, TB is a major public health burden with an estimated 10.4 million new cases and 1.8 million deaths reported in 2015. Although TB is curable, the treatment options currently available are beset by numerous shortcomings such as lengthy and complex treatment regimens, drug-drug interactions, drug toxicities, as well as emergence of widespread multi-drug resistance. Therefore, there is an urgent and compelling need to develop new, more effective, safer drugs with novel mechanisms of act

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13

Pyles, David Andrew. "Design and Application of Novel Benzobisoxazole and Benzobisthiazole Linked Porous Polymers." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu155428770646841.

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14

Chen, Weihua. "Chemical Sensors Based on Fluorescence Turn-On Mechanism by Using Excited State Intramolecular Proton Transfer." University of Akron / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=akron1334772708.

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15

Duroux, Romain. "Conception, synthèse et évaluation d'antagonistes des récepteurs A2A." Thesis, Lille 2, 2017. http://www.theses.fr/2017LIL2S015/document.

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La maladie d’Alzheimer (MA) est la maladie neurodégénérative touchant le plus de personnes dans le monde. Jusqu’à présent, aucun traitement curatif n’existe pour soigner cette maladie, d’où la nécessité d’identifier et d’étudier de nouvelles cibles thérapeutiques.La découverte des effets bénéfiques de la caféine, antagoniste du récepteur à adénosine A2A (A2AR), conjuguée à une surexpression de ce dernier chez les patients atteints de la MA, font de ce récepteur une cible d’intérêt. En effet, des antagonistes des A2ARs ont montré leur capacité à améliorer les performances cognitives de par une

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16

Salcedo-Serna, Maria-Angela. "Synthèse de 1,4-benzodiazépines-2,5-diones et benzoxazole-isoindolinones par séquences : réaction d'Ugi / cyclisations intramoléculaires : travaux préliminaires pour une nouvelle synthèse de la phytosphingosine." Paris 11, 2007. http://www.theses.fr/2007PA112190.

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Le projet de thèse s’est articulé en trois parties. Dans les deux premières parties, nous avons développé des synthèses rapides d’hétérocycles facilement variables et très fonctionnalisés, via des séquences de réaction d’Ugi/cyclisation intramoléculaire. Nous avons pu mettre au point deux séquences générales permettant d’obtenir, en peu d’étapes à partir de produits commerciaux ou facilement accessibles, des 1,4-benzodiazépine-2,5-diones et des benzoxazole-isoindolinones. Les 1,4-benzodiazépine-2,5-diones ont été obtenues grâce une séquence domino N-arylation/couplage croisée palladocatalysé.

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17

Chan, Karen Hoi-Lam. "A genomics-led approach to deciphering heterocyclic natural product biosynthesis." Thesis, University of Cambridge, 2019. https://www.repository.cam.ac.uk/handle/1810/284916.

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Heterocycles play an important role in many biological processes and are widespread among natural products. Oxazole-containing natural products possess a broad range of bioactivities and are of great interest in the pharmaceutical and agrochemical industries. Herein, the biosynthetic routes to the oxazole-containing phthoxazolins and the bis(benzoxaozle) AJI9561, were investigated. Phthoxazolins A-D are a group of oxazole trienes produced by a polyketide synthase-nonribosomal peptide synthetase (PKS-NRPS) pathway in Streptomyces sp. KO-7888 and Streptomyces sp. OM-5714. The phthoxazolin pathwa

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18

Chernykh, Andrey. "Main Chain Type Benzoxazine Polymers for High Performance Applications." Cleveland, Ohio : Case Western Reserve University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=case1232733414.

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19

Tuzun, Alev. "Integrating plant oils in benzoxazine chemistry." Doctoral thesis, Universitat Rovira i Virgili, 2015. http://hdl.handle.net/10803/319708.

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Les polibenzoxazines son una classe relativament nova de resines fenòliques termoestables que posseeixen interessants propietats per a la indústria electrònica, automobilística, aerospacial i d’adhesius. Les seves possibilitats superen a les dels sistemes fenòlics clàssics, novolaques i resols, principalment en que no necessiten catalitzador per portar a terme el seu curat i no alliberen volàtils de condensació durant el mateix. Els monòmers benzoxazina es preparen habitualment per combinació de fenols i amines amb formaldehid mitjançant una condensació tipus Mannich. Aquesta química ofereix u

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20

Kingsbury, Oliver William. "The inhibition of cysteine proteinases." Thesis, University of Oxford, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.360390.

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21

Hutson, Leslie K. "Synthesis of Benzoxazoles Containing Allyl Crosslinking Sites via Claisen Rearrangements." Wright State University / OhioLINK, 1999. http://rave.ohiolink.edu/etdc/view?acc_num=wright974400715.

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22

Puchot, Laura. "Cardanol : a bio-based building block for new sustainable and functional materials." Thesis, Cergy-Pontoise, 2016. http://www.theses.fr/2016CERG0828/document.

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Récemment, la chimie des ressources renouvelables et les matériaux qui en découlent ont suscités un intérêt considérable dans le but de limiter l’utilisation des ressources fossiles. La présente thèse intitulée « Cardanol : a bio-based building block for new sustainable and functional materials » traite de la modification chimique du cardanol et de son utilisation dans diverses applications. Le cardanol est un dérivé phénolique naturel extrait de l’huile de coque de noix de cajou. Sa structure chimique est intéressante : il est substitué d’une chaîne alkyle en C15, partiellement insaturée, et

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23

Demachy, Charles. "Synthèse électrochimique de nouveaux dérivés de la benzoxazine." Paris 5, 1995. http://www.theses.fr/1995PA05P068.

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24

de, Souza Lucio R. "SYNTHESIS AND APPLICATION OFHIGH PERFORMANCE BENZOXAZINE-EPOXY COPOLYMERS." Case Western Reserve University School of Graduate Studies / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=case1618528984888642.

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25

Patlapati, Ravinarayana Reddy Tejas. "Interlayer toughening of carbon-fiber/benzoxazine composite laminates." Thesis, California State University, Long Beach, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10264601.

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<p> Carbon-fiber composites are increasingly employed in the Aerospace and Automotive industries owing to their lightweight and excellent mechanical properties. However, this class of material, when subjected to out-of-plane loads, is often susceptible to an internal damage in the form of delamination that can severely reduce its load bearing capacity. Several toughening methods including the implementation of thermoplastic materials are used to increase the damage tolerance of the polymer-matrix composites. In particular, non-woven thermoplastic veils, when used as interleaving materials betw

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26

Abreu, Marluza Pereira de. "Síntese e estudo de reconhecimento de íons de derivados fluorescentes do ácido esquárico." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2014. http://hdl.handle.net/10183/117651.

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O presente trabalho apresenta a síntese e caracterização fotofísica de novos derivados fluorescentes do ácido esquárico obtidos pela reação deste com N-aminobenzoxazóis. O ácido esquárico é considerado um oxocarbono com características particulares, sendo que as suas amidas derivadas são bifuncionais, podendo complexar tanto com cátions como com ânions. Sendo assim, foram obtidas sete novas estruturas fluorescentes derivadas do ácido esquárico contendo três diferentes heterociclos N-aminobenzoxazóis através de metodologias distintas. Foram sintetizadas quatro amidas dissubstituídas (esquaramid

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27

Patel, Ruchi D. "Thermal Aging of Benzoxazine-Epoxy Systems and Their Composites." Thesis, California State University, Long Beach, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=10979174.

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<p> New applications of polymers and their composites are arising and replacing traditional materials in the sectors of aerospace, automotive, and civil industries. Polymers and their composites are susceptible to oxidative degradation at high temperatures, especially when approaching but not quite reaching the glass transition temperature (<i>T<sub>g</sub></i>). Although the carbon fibers in these composites are stable at such temperatures, the matrix and especially the fiber-matrix interface can undergo degradation that affects the physical, chemical, and mechanical properties of the structu

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28

Köhne, Ingo. "Novel Bulky Bis(benzoxazol-2-yl)methane Ligands in s-Block Metal Coordination." Doctoral thesis, Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2018. http://hdl.handle.net/11858/00-1735-0000-002E-E3E8-1.

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29

Affeldt, Ricardo Ferreira. "Síntese e estudo fotofísico de novos heterociclos nitrogenados contendo fluoróforos benzazólicos." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2011. http://hdl.handle.net/10183/36340.

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Neste trabalho foi desenvolvida a síntese e caracterização do composto fluorescente 2- (5’-formil-2’-hidroxifenil)benzoxazol. O grupo formil incluído no heterociclo através de uma adptação da reação de Duff possui grande versatilidade sintética e permitiu a utilização deste fluoróforo na reação multicomponente de Hantzch para síntese de 1,4- dihidropiridinas fluorescentes também inéditas na literatura, com rendimentos moderados. Foi efetuado o estudo fotofísico de todas as moléculas sintetizadas através de técnicas de espectrofotometria de absorção na região do ultravioleta-visível e espectrof

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30

Gouni, Sreeja Reddy. "Cure Kinetics of Benzoxazine/Cycloaliphatic Epoxy Resin by Differential Scanning Calorimetry." Thesis, California State University, Long Beach, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10689461.

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<p>Understanding the curing kinetics of a thermoset resin has a significant importance in developing and optimizing curing cycles in various industrial manufacturing processes. This can assist in improving the quality of final product and minimizing the manufacturing-associated costs. One approach towards developing such an understanding is to formulate kinetic models that can be used to optimize curing time and temperature to reach a full cure state or to determine time to apply pressure in an autoclave process. Various phenomenological reaction models have been used in the literature to succ

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31

Benelhadj, Karima. "Synthèse et propriétés optiques de fluorophores à squelette iminophénol : transfert de proton à l'état excité et complexes de bore (III)." Thesis, Strasbourg, 2015. http://www.theses.fr/2015STRAF060/document.

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Les travaux de cette thèse portent sur l'élaboration et l'étude de sondes fluorescentes construites autour d'un squelette iminophénol, permettant ainsi d'accéder à un panel de composés absorbants et émettant sur une large gamme spectrale {UV, visible, proche infrarouge) et présentant des propriétés optiques remarquables : des coefficients d'absorption importants,des rendements quantiques élevés et de grands déplacements de Stockes. Des voies synthétiques simples et efficaces ont permis la constitution d'un catalogue de fluorophores modulables sur une large gamme du spectre électromagnétique. E

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32

Domingues, Junior Nei Sebastiao. "Aplicação de métodos semi-empíricos sobre estruturas (2'-Hidroxifenil) Benzoxazóis." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 1999. http://hdl.handle.net/10183/17726.

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A geometria dos estados fundamental e primeiro estado excitado para a 2,5- (2' -benzoxazolil) hidroquinona (BBHQ) e seu derivado meti lado (BBMP) foram calculados utilizando o método semiempírico AMl. Os dados obtidos foram empregados em um estudo comparativo entre os métodos espectroscópicos HAM/3 e INDO/S-CI. Além disto o espectro de absorção eletrônica de uma série de derivados do 2-(2'-hidroxifenil)benzoxazol (HBO) foram calculados utilizando AMl e MNDO-PM3 para otimização das geometrias e HAM/3 e INDO/S-CI para os dados espectroscópicos. Os cálculos mostram que as formas mais estáveis par

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33

Dunkers, Joy Patricia. "Vibrational, crystallographic, and mechanistic studies of benzoxazine monomers and their resulting polybenzoxazines as novel phenolic resins." Case Western Reserve University School of Graduate Studies / OhioLINK, 1994. http://rave.ohiolink.edu/etdc/view?acc_num=case1058880772.

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34

Velez-Herrera, Pedro. "Functional Polybenzoxazine Resin as Advanced Electronic Materials." Case Western Reserve University School of Graduate Studies / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=case1201274106.

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35

Pham, Hong-Ngoc. "Synthesis of enantiopure 3,4-dihydro-2H-1,4-benzoxazine analogues for potential biological applications." Electronic Thesis or Diss., Université de Lorraine, 2020. http://www.theses.fr/2020LORR0186.

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Ce travail décrit la synthèse et l'analyse conformationnelle de pseudodipeptides et pseudotripeptides à base d’un motif 1,4-benzoxazinique énantiopur. Les énantiomères du 2,3-dibromopropionate d'éthyle et du 3,4-dihydro-2H-1,4-benzoxazine-2-carboxylate d'éthyle sont obtenus par deux stratégies (i) synthèse énantiosélective et (ii) énantioséparation des racemiques par HPLC préparative à l’échelle du multigramme. En raison de processus de racémisation au cours des synthèses énantiosélectives, l'énantioséparation des racemiques par HPLC préparative est realisée avec succès pour accéder aux différ

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36

Shtamburg, V. G., A. V. Tsyhankov, E. A. Klots, and R. G. Kostyanovsky. "Geminal System O-N-O: XRD Studies of Structure of Cyclic N,N-dialkoxyderivatives of Amines and Ureas." Thesis, Ekskluziv Publ, 2015. http://repository.kpi.kharkov.ua/handle/KhPI-Press/36900.

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37

Schulz, Knut. "Beitrag zur Synthese und Chemie von 2H-Benzo(1,4)chalkogenazinen Darstellung neuer Lactamstrukturen, Tetrazole und Aminoketone." Berlin mbv, 2008. http://d-nb.info/992998670/04.

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38

Chouman, Faten. "Étude des composés de polymérisation des dihydro-3,4-2H-benzoxazine-1,3 par des techniques chromotographiques." Besançon, 1989. http://www.theses.fr/1989BESA2042.

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Une etude de la distribution des masses moleculaires par gpc est proposee pour les composes formes lors d'une polymerisation thermique d'heterocycles derives de la benzoxazine pour obtenir des resines phenoliques. Pour l'etalonnage du systeme chromatographique utilise, differentes series de composes sont mises en uvre, pour permettre de determiner ulterieurement la taille des oligomeres obtenus lors de la polymerisation de benzoxazine diversement substituees. Differentes interactions solute-solvants sont prises en compte pour expliquer les difficultes obtenues en chromatographie. Une analyse p

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39

Liu, Jingping. "Synthesis, characterization, reaction mechanism and kinetics of 3,4-dihydro-2H-1,3-benzoxazine and its polymer." Case Western Reserve University School of Graduate Studies / OhioLINK, 1995. http://rave.ohiolink.edu/etdc/view?acc_num=case1062775094.

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Jin, Lin. "Applications of Polybenzoxazines for Improvement in Processability and Property." Cleveland, Ohio : Case Western Reserve University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=case1264103508.

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Thesis (Doctor of Philosophy)--Case Western Reserve University, 2010<br>Department of Macromolecular Science and Engineering Title from PDF (viewed on 2010-05-25) Includes abstract Includes bibliographical references and appendices Available online via the OhioLINK ETD Center

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Liu, Jiacheng. "Fabrication, Synthesis, and Characterization of Flame Retardant and Thermally Stable Materials: Flame Retardant Coating for Polyurethane Foam and Fused-ring Benzo-/naphthoxazines." Case Western Reserve University School of Graduate Studies / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=case1491229961956675.

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Ganfoud, Rime. "Vers des thermodurcissables bio-sourcés : polybenzoxazines à partir de cardanol et composites à base de dialdéhyde cellulose." Thesis, Université Côte d'Azur (ComUE), 2018. http://www.theses.fr/2018AZUR4209.

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L’utilisation et la valorisation de ressources renouvelables dans le domaine de la chimie connait un intérêt grandissant pour remplacer les ressources fossiles. Le travail présenté dans ce manuscrit de thèse est axé sur deux ressources bio-sourcées utilisées pour la préparation de thermodurcissables bio-sourcés : huile végétale et biomasse lignocellulosique. La première partie concerne les polybenzoxazines. A partir d’un monomère à base de phénol, le caractère bio-sourcé est progressivement augmenté par substitution du phenol par du cardanol. Le cardanol est un dérivé phénolique bio-sourcé ext

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Tesng, Jean Huang, and 曾金煌. "Dyes of benzoxazole." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/05741017817261528639.

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碩士<br>國立中央大學<br>化學工程學系<br>85<br>Abstract Benzoxazole compounds were prepared by reactants of 2-aminophenol and 4-hydroxy-3-nitrobenzoic acid (mole ratio 10:1) in the presence of condensing agent,phosphorus pentoxide/ methanesulfonic acid. The pruduct, 2-(4-hydroxy-3-nitrophenyl) benzoxazole, was reduced by the catalyzer, NH2NH2(aq) -Pd/C, to get the amino phenyl benzoxazole. it was reacted with the derivativesof benzoic acid to obtain 2-phenyl-5- benzoxazolybenzoxazoles. The compounds whi

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Lin, Chia-Yi, and 林佳儀. "Photosensitive poly(benzoxazole)/organoclaynanocomposites." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/10420128614715396984.

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碩士<br>國立成功大學<br>材料科學及工程學系碩博士班<br>92<br>A project was carried out aimed at reducing the coefficient of thermal expansion (CTE) of photositive polybenzoxazole formulations (photoresists) through the incorporation of an organoclay. The organoclay was formed by a cation exchange reaction between a Na+-montmorillonite clay and an ammonium salt of dodecylamine (DOA). The polybenzoxazole (PBO) precursor polyhydroxyamide (PHA) was made by polycondensation reaction between 2,2-bis(3-amino-4-hydroxyphenol) hexafluoropropane (BisAPAF) and 4,4-oxydibenzoyl chloride (ODC) with an inherent viscosity of 0.3d

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Chen, Yung Sun, and 陳詠生. "Polymerization and Dyes of Benzoxazole." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/13332147313454590058.

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碩士<br>國立中央大學<br>化學工程學系<br>85<br>Abstract Benzoxazole and its derivatives belong to fluorescent dye. It can be prepared by reactive benzoic acid With 2-aminophenol in the presence of condensing agent, phosphorus pentoxide /methane sulfonic acid (PPMA). This study prepare 4-hydroxy-3-amino-benzoic acid from 4-hydroxy-3-nitro- benzoic acid by esterfication, hydrogenation and hydrolysis. Use PPMA as a condensing agent to polymerize 4-hydroxy-3-amino- benzoxazole give polybenzoxazole. This po

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Tseng, Ting-yu, and 曾亭瑜. "The Odd-even Effects in Dimeric Benzoxazole Derivatives." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/09644043708453719179.

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碩士<br>國立中央大學<br>化學研究所<br>95<br>Liquid crystalline dimers, known so-called twins or bimesogens have attracted great attentions. This type of mesogenic structures was generally constructed by connecting either two identical or non-identifcal mesogenic moieties through a flexible central spacer. The structural conformation and mesomorphic properties observed by this type of LC dimers are quite different from conventional molecular mesogens, and also significantly influenced by the structure and the spacer length and the linker group as well. The mesomorphic properties of such dimeric compounds we

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Wu, I.-tzu, and 吳宜姿. "Metallomesogens Derived from Benzoxazole and cis-Enaminoketones Derivatives." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/78301665270555518788.

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碩士<br>國立中央大學<br>化學研究所<br>99<br>In series I the synthesis, characterization and mesomorphic behavior of a series of benzoxazole derivatives 2 and their complexes 1 (M = Pd, Cu, Zn) are described. The mesomorphic properties were investigated using polarized optical microscopy (POM), differential scanning calorimetry (DSC), powder X-ray diffraction (XRD). The results indicated that ligands based on benzoxazole with carbon length of n = 10, 12 showed smectic A (SmA) mesophase. All copper (II) and zinc (II) complexes were not mesogenic. However, palladium (II) comlexes with carbon length of n = 10,

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Luo, Guo-Wei, and 羅國瑋. "Synthesis and Properties of Poly(benzoxazole-imide)Copolymer/Clay Nanocomposites." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/76168487506357286813.

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碩士<br>國立成功大學<br>材料科學及工程學系碩博士班<br>92<br>Poly(benzoxazole-imide) (PBO-PI) copolymer/clay nanocomposites have been prepared from a PBO-PI precursor－poly(hydroxyamide-amic acid) (PHA-PAA) and two different organoclays. The PBO-PI precursor was made by a polycondensation reaction between 2,2-bis(3-amino-4-hydroxyphenol) hexafluoropropane (BisAPAF), 4,4-oxydiphthalic anhydride (ODPA) and isophthaloyl dichloride (IC). The organoclays were formed by a cation exchange reaction between a Na+-montmorillonite clay and an ammonium salt of dodecylamine (DOA) or 4-phenoxyaniline (POA). The glass transition t

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chu, kai jae, and 邱凱傑. "nitration.sulfonation of polystyrene and their derivatives of reactive dye and benzoxazole." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/96513996023440161537.

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碩士<br>國立中央大學<br>化學工程學系<br>85<br>The reuse waste foaming polystyrene(PS) have received considerable attention for years . In order to resolve the pollution of PS , we try to sythetize reactive-dyes or benzoxazole compounds from PS .We are going to use a recycle waste polystyrene , porilon , such as some process of nitration 、sulfonation and then reduction to get active amino and water soluable sulfonic group on the phenyl of polystyrene .The amino function will be reacted with first chloro o

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Wang, Chung-Shu, and 王崇旭. "The Effect of Terminal Functional Group on Mesomorphic Properties of Benzoxazole Derivatives." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/21502841229740618182.

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碩士<br>國立中央大學<br>化學研究所<br>92<br>Abstract In this thesis, we report the synthesis, characterization and mesomorphic properties of two novel series of new mesogenic derivatives based on [4-(6-alkoxybenzoxazol-2-yl)phenyl]-4-X-benzy lidenes (as shown below, X = CN, F, Cl, NO2, OCH3 and etc.) and metal complexes of 5-alkoxy-2-{[4-(6-alkoxybenzoxazol-2-yl)phenylimino] methyl}phenols. These compounds were all characterized by 1H-NMR and 13C-NMR spectroscopy, and their mesomorphic properties were studied by differential scanning calorimeter (DSC) and polarized optical microscopy (POM). The results ind

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