Selected Specific Rates of Reactions of Transients from Water in Aqueous Solution
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
New Nickel Complexes for Trifluoromethylation Studies
NEW NICKEL COMPLEXES FOR TRIFLUOROMETHYLATION STUDIES A THESIS SUBMITTED TO THE GRADUATE DIVISION OF THE UNIVERSITY OF HAWAIʻI AT MĀNOA IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF SCIENCE IN CHEMISTRY DECEMBER 2012 BY Hiromi Ichioka Thesis Committee: David Vicic, Chairperson Marcus A. Tius Philip Williams i NEW NICKEL COMPLEXES FOR TRIFLUOROMETHYLATION STUDIES A THESIS SUBMITTED TO THE GRADUATE DIVISION OF THE UNIVERSITY OF HAWAIʻI AT MĀNOA IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF SCIENCE IN CHEMISTRY DECEMBER 2012 BY Hiromi Ichioka Thesis Committee: David Vicic, Chairperson Marcus A. Tius Philip Williams ii Acknowledgements I would like to thank the members of my thesis committee for spending their time to modify my thesis. I would like to appreciate Professor Vicic for overall advice. I would like to thank help and support from many individuals in the Chemistry Department, from faculty and staff. I would like to thank University of Hawaii for financial support in the form of teaching assistant. I would like to thank Professor Yamaguchi working together to synthesize bis-perfluoroalkyl nickel complexes. I would also like to appreciate Professor Shimada to experimentally help me and make good advice. iii Abstract We decided to prepare bis-perfluoroalkyl nickel complexes bearing a bipyridine ligand for investigation of the fundamental nickel perfluoroalkyl chemistry and reductive elimination of perfluoroethylene. Moreover, we envisioned a new precursor for investigation of Ar-CF3 reductive elimination. We have successfully demonstrated the syntheses of [(dtbpy)Ni(CF3)2] and [(dtbpy)Ni(CF2CF3)2] in moderate yields. The key intermediate nickel complex, [(tmeda)Ni(CF3)Br] allowed for the preparation of new complexes in good yields. -
12E4968079.Pdf
Fluorocarbon compatibilized gold-silica nanocomposites for recyclable regioselective hydroamination of alkynes in a fluorous biphasic system Item Type Conference Paper Authors Merican, Zulkifli; Vu, Bao Khanh; Solovyeva, Vera; Rodionov, Valentin; Khe, Cheng Seong; Rajalingam, Sokkalingam; Vasant, Pandian Citation Merican Z, Vu BK, Solovyeva VA, Rodionov VO, Khe CS, et al. (2016) Fluorocarbon compatibilized gold-silica nanocomposites for recyclable regioselective hydroamination of alkynes in a fluorous biphasic system. Available: http:// dx.doi.org/10.1063/1.4968079. Eprint version Publisher's Version/PDF DOI 10.1063/1.4968079 Publisher AIP Publishing Rights This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. The following article appeared in Merican, Z., Vu, B.K., Solovyeva, V.A., Rodionov, V.O., Khe, C.S., Rajalingam, S. and Vasant, P., 2016, November. Fluorocarbon compatibilized gold-silica nanocomposites for recyclable regioselective hydroamination of alkynes in a fluorous biphasic system. In 4TH INTERNATIONAL CONFERENCE ON FUNDAMENTAL AND APPLIED SCIENCES (ICFAS2016) (Vol. 1787, No. 1, p. 030014). AIP Publishing and may be found at http://aip.scitation.org/doi/abs/10.1063/1.4968079. Download date 27/09/2021 23:14:23 Link to Item http://hdl.handle.net/10754/622088 Fluorocarbon compatibilized gold-silica nanocomposites for recyclable regioselective hydroamination of alkynes in a fluorous biphasic system Zulkifli Merican, Bao Khanh Vu, Vera A. Solovyeva, Valentin O. Rodionov, Cheng Seong Khe, Sokkalingam Rajalingam, and Pandian Vasant Citation: 1787, 030014 (2016); doi: 10.1063/1.4968079 View online: http://dx.doi.org/10.1063/1.4968079 View Table of Contents: http://aip.scitation.org/toc/apc/1787/1 Published by the American Institute of Physics Fluorocarbon Compatibilized Gold-Silica Nanocomposites For Recyclable Regioselective Hydroamination of Alkynes In A Fluorous Biphasic System Zulkifli Merican1, a Bao Khanh Vu2, Vera A. -
Sodium Hydroxide
Sodium hydroxide From Wikipedia, the free encyclopedia • Learn more about citing Wikipedia • Jump to: navigation, search Sodium hydroxide IUPAC name Sodium hydroxide Other names Lye, Caustic Soda Identifiers CAS number 1310-73-2 Properties Molecular NaOH formula Molar mass 39.9971 g/mol Appearance White solid Density 2.1 g/cm³, solid Melting point 318°C (591 K) Boiling point 1390°C (1663 K) Solubility in 111 g/100 ml water (20°C) Basicity (pKb) -2.43 Hazards MSDS External MSDS NFPA 704 0 3 1 Flash point Non-flammable. Related Compounds Related bases Ammonia, lime. Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references Sodium hydroxide (NaOH), also known as lye, caustic soda and sodium hydrate, is a caustic metallic base. Caustic soda forms a strong alkaline solution when dissolved in a solvent such as water. It is used in many industries, mostly as a strong chemical base in the manufacture of pulp and paper, textiles, drinking water, soaps and detergents and as a drain cleaner. Worldwide production in 1998 was around 45 million tonnes. Sodium hydroxide is the most used base in chemical laboratories. Pure sodium hydroxide is a white solid; available in pellets, flakes, granules and as a 50% saturated solution. It is deliquescent and readily absorbs carbon dioxide from the air, so it should be stored in an airtight container. It is very soluble in water with liberation of heat. It also dissolves in ethanol and methanol, though it exhibits lower solubility in these solvents than potassium hydroxide. -
Structural Diversity of Anodic Zinc Oxide Controlled by the Type Of
Reviews ChemElectroChem doi.org/10.1002/celc.202100216 Zinc Anodizing: Structural Diversity of Anodic Zinc Oxide Controlled by the Type of Electrolyte Katja Engelkemeier,*[a, c] Aijia Sun,[a, c] Dietrich Voswinkel,[b, c] Olexandr Grydin,[b, c] Mirko Schaper,[b, c] and Wolfgang Bremser[a, b] ChemElectroChem 2021, 8, 1–15 1 © 2021 The Authors. ChemElectroChem published by Wiley-VCH GmbH These are not the final page numbers! �� Wiley VCH Dienstag, 18.05.2021 2199 / 204431 [S. 1/15] 1 Reviews ChemElectroChem doi.org/10.1002/celc.202100216 Anodic zinc oxide (AZO) layers are attracting interdisciplinary The article gives an overview of the different possibilities of research interest. Chemists, physicists and materials scientists anodic treatment, whereby the voltage and the current type are are increasingly devoting attention to fundamental and the main distinguishing criteria. Presented is the electrolytic application-related research on these layers. Research work oxidation (anodizing) and the electrolytic plasma oxidation focuses on the application as semiconductor, corrosion protec- (EPO). The electrolytic etching is also a process of anodic tor, adhesion promoter, abrasion protector, or antibacterial treatment. However, it does not produce AZO layers, but rather surfaces. The structure and crystallinity essentially determine a degradation of the zinc layer. The review article shows the the properties of the AZO coatings. The type and concentration parameters used so far (electrolyte, current type, current of the electrolyte, the applied current density or voltage as well density, voltage) and points out the influence on the formation as the duration time enable layer structures of structural variety. of AZO structures in dependency to the used electrolyte. -
Accelerated Gas-Liquid Visible Light Photoredox Catalysis With
Accelerated Gas-liquid Visible Light Photoredox Catalysis with Continuous-Flow Photochemical Microreactors Natan J. W. Straathof,a,† Yuanhai Su, a,† Volker Hessel, a Timothy Noëla,b* a Eindhoven University of Technology, Department of Chemical Engineering and Chemistry, Micro Flow Chemistry & Process Technology, Building 14 (Helix), De Rondom 70, 5612 AP Eindhoven, The Netherlands. b Department of Organic Chemistry, Ghent University, Krijgslaan 281 (S4), 9000 Ghent, Belgium. † Authors contributed equally to this work. Correspondence should be addressed to T.N. ([email protected]) Abstract In this protocol, a detailed description for the construction and application of an operationally simple photochemical microreactor for visible light gas-liquid photoredox catalysis is presented. The general procedure includes details of an appropriate photochemical setup and representative procedures for the continuous- flow preparation of trifluoromethylated heterocycles and thiols, and disulfides via generation of singlet oxygen. The reported photomicroreactors are modular, inexpensive and can be prepared rapidly from commercially available parts within one hour even by non-specialists. Interestingly, typical reaction times of gas-liquid visible light photocatalytic reactions can be reduced from the hour range in batch to the minute range in microflow. This can be attributed to the improved irradiation efficiency of the reaction mixture and the enhanced gas-liquid mass transfer in the segmented gas-liquid flow regime. 1 Keywords: Photoredox Catalysis, Continuous Flow, Microreactor, Trifluoromethylation, Photocatalytic Oxidation. 2 Introduction Recently, visible light photoredox catalysis has emerged as a new and innovative approach to enable small molecule activation. This activation mode relies on the use of organometallic complexes1 or organic dyes2,3 to absorb photons and to, subsequently, engage in single electron or energy transfer processes with organic substrates (Figure 1). -
Alkyl and Fluoroalkyl Manganese Pentacarbonyl Complexes As
En vue de l'obtention du DOCTORAT DE L'UNIVERSITÉ DE TOULOUSE Délivré par : Institut National Polytechnique de Toulouse (Toulouse INP) Discipline ou spécialité : Chimie Organométallique et de Coordination Présentée et soutenue par : M. ROBERTO MORALES CERRADA le jeudi 15 novembre 2018 Titre : Complexes de manganèse pentacarbonyle alkyle et fluoroalkyle comme modèles d'espèces dormantes de l'OMRP Ecole doctorale : Sciences de la Matière (SDM) Unité de recherche : Laboratoire de Chimie de Coordination (L.C.C.) Directeur(s) de Thèse : MME FLORENCE GAYET M. BRUNO AMEDURI Rapporteurs : M. GERARD JAOUEN, UNIVERSITE PARIS 6 Mme SOPHIE GUILLAUME, CNRS Membre(s) du jury : M. MATHIAS DESTARAC, UNIVERSITE TOULOUSE 3, Président M. BRUNO AMEDURI, CNRS, Membre M. HENRI CRAMAIL, INP BORDEAUX, Membre Mme FLORENCE GAYET, INP TOULOUSE, Membre A mi abuelo Antonio ‐ i ‐ ‐ ii ‐ Remerciements Ce travail a été réalisé dans deux unités de recherche du CNRS : le laboratoire de Chimie de Coordination (LCC) à Toulouse, au sein de l’équipe LAC2, et l’Institut Charles Gerhardt de Montpellier (ICGM), au sein de l’équipe IAM. Il a été codirigé par Dr. Florence Gayet et Dr. Bruno Améduri. Je tiens tout d’abord à remercier Dr. Azzedine Bousseksou, directeur du LCC, et Dr. Patrick Lacroix‐Desmazes, directeur de l’équipe IAM à l’ICGM, pour avoir accepté de m’accueillir au sein de ses laboratoires. Je remercie tout particulièrement mes directeurs de thèse, Dr. Florence Gayet et Dr. Bruno Améduri, pour m’avoir encadré durant ces trois années de doctorat. Un immense merci à tous les deux pour tous leurs conseils, leur patience et leurs connaissances qui m’ont apporté et qui m’ont permis de mener à bien ce travail. -
LESSON 11 THEME: Equilibriums in Solutions of Coordination Complexes
LESSON 11 THEME: Equilibriums in solutions of coordination complexes. Heterogeneous equilibriums and processes. Research work: «Reception of complexes. Medicobiological value: the coordination complexes carry out various biological functions. So, for vital activity of a human organism the unique value has a coordination complex of iron ions with protein - haemoglobin exercising transport of oxygen from lung to tissues. In life of plants the important role is played chlorophyll - complex of magnesium, due to which the plants transmute carbone dioxide and water into composite organic matters (amylum, saccharum, etc.). The ion Cu2+is the component of several important enzymes - participants of a biological oxidizing. The coordination complexes of a cobalt considerably raise intensity of protein metabolism, regulate composition of a blood. Metalenzymes is the coordination complexes with high specificity of ions of metals, among them, except for mentioned above, is more often than others there are ions of zinc, molybden, manganese. In the whole cations almost of all metals are in alive organisms as coordination complexes. Pollution by transition metals and their compounds: mercury, lead, cadmium, chromium, nickel - can result into a poisoning. The toxicity of such compounds in many cases is explained to that these ions supersede ions of biogenic metals (Fe, Zn, Cu, W) from coordination complexes with a bioorganic ligand (for example, porphyrin). The stability of coordination complexes, formed at it, usually is higher, they collect in an organism, therefore the normal vital activity of an organism is broken and the toxicosis begins. The coordination complexes will be used in medical practice. Various metals (macroelements) introduce to the organism as coordination complexes. -
Fluorination Reagents, Fluorinated Building Blocks
The list of products We introduce our products according to their applications and their structure. Fluorinating Agents ・・・・・・・・・・ 7 Difluoro Aromatic Hydrocarbons ・・・・・・ 27 1,2-Difluorobenzenes ・・・・・・・・・・・・・・・・ 27 Electrophilic Fluorinating Agents・ ・・・・・・ 7 1,3-Difluorobenzenes ・・・・・・・・・・・・・・・・ 29 Nucleophilic Fluorinating Agents・ ・・・・・・ 7 1,4-Difluorobenzenes ・・・・・・・・・・・・・・・・ 32 Trifluoro Aromatic Hydrocarbons ・・・・・・ 32 Difluoromethylating Agents ・・・・・・ 7 1,2,3-Trifluorobenzenes ・・・・・・・・・・・・・・・ 32 1,2,4-Trifluorobenzenes ・・・・・・・・・・・・・・・ 33 Trifluoromethylating Agents ・・・・・・ 8 1,3,5-Trifluorobenzenes ・・・・・・・・・・・・・・・ 34 Polyfluoro Aromatic Hydrocarbons ・・・・・ 34 Trifluoromethylthiolating Agents ・・・・ 8 Tetrafluorobenzenes ・・・・・・・・・・・・・・・・・ 34 Pentafluorobenzenes ・・・・・・・・・・・・・・・・ 35 Other Polyfluoro Aromatic Hydrocarbons ・・・・・・・ 37 Perfluoroalkylating Agents ・・・・・・・ 9 Difluoromethyl / Difluoromethoxy Aromatic Hydrocarbons ・・・・・・・・・・・ 37 Other Fluorinated Group Introducing Trifluoromethyl Aromatic Hydrocarbons ・・・ 38 Agents ・・・・・・・・・・・・・・・・ 9 Monosubstituted (ortho-) Trifluoromethylbenzenes ・・ 38 Monosubstituted (meta-) Trifluoromethylbenzenes ・・・ 38 Monosubstituted (para-) Trifluoromethylbenzenes ・・・ 40 Fluorinated Building Blocks ・・・・・ 10 Disubstituted Trifluoromethylbenzenes ・・・・・・・・ 41 Other Trifluoromethyl Aromatic Hydrocarbons ・・・・・ 43 Monofluoro Aromatic Compounds ・・・・ 10 Monosubstituted (ortho-) Monofluorobenzenes ・・・・ 10 Trifluoromethoxy Aromatic Hydrocarbons ・・ 44 Monosubstituted (meta-) Monofluorobenzenes ・・・・ 11 Trifluoromethylthio -
Synthesis of Polymer Nanoparticles Using
SYNTHESIS OF POLYMER NANOPARTICLES USING INTRAMOLECULAR CHAIN COLLAPSE AND BENZOCYCLOBUTENE CHEMISTRY A Dissertation Presented to The Graduate Faculty of The University of Akron In Partial Fulfillment Of the Requirements for the Degree Doctor of Philosophy Ajay Ramesh Amrutkar September 2016 i SYNTHESIS OF POLYMER NANOPARTICLES USING INTRAMOLECULAR CHAIN COLLAPSE AND BENZOCYCLOBUTENE CHEMISTRY Ajay Ramesh Amrutkar Dissertation Approved: Accepted: Advisor Department Chair Dr. Coleen Pugh Dr. Coleen Pugh Committee Chair Dean of the College Dr. Li Jia Dr. Eric Amis Committee Member Dean of the Graduate School Dr. Stephen Cheng Committee Member Date Dr. Mesfin Tsige Committee Member Dr. Alamgir Karim ii ABSTRACT Single chain polymer nanoparticle (SCPN) synthesis from different polymer precursors using benzocyclobutene (BCB) chemistry and intramolecular crosslinking was investigated in this study. Synthesis of highly fluorinated SCPNs from highly fluorinated uni-block copolymer precursor utilizing ‘pseudo-high dilution continuous addition technique’ was investigated. GPC confirmed selective intramolecular crosslinking and TEM images supported formation of sub-20 nm spherical polymer nanoparticles. Amphiphilic SCPNs prepared via step-wise crosslinking of an amphiphilic di-block copolymer chain were investigated for their morphology using 4 different characterization techniques: TEM, AFM, DLS and DOSY-NMR. TEM and AFM images showed presence of discreet SCPNs as loosely crosslinked coils that flatten out when deposited on the surface forming pancake like morphology with ≈ 20 nm sizes. All the techniques showed presence of bimodal size distribution of these nanoparticles in solution. A smaller sized distribution represented discreet SCPNs whereas larger sized (>40 nm) distribution represented physical aggregates of SCPNs. These aggregates were broken down upon significantly diluting the solution of nanoparticles (≤50 ng/mL). -
Halons Technical Options Committee 2018 AssessMent Report
Halons Technical Options Committee 2018 Assess ment Report Volume 1 Montreal Protocol on Substances that Deplete the Ozone Layer Ozone Secretariat MONTREAL PROTOCOL ON SUBSTANCES THAT DEPLETE THE OZONE LAYER REPORT OF THE HALONS TECHNICAL OPTIONS COMMITTEE DECEMBER 2018 VOLUME 1 2018 ASSESSMENT REPORT i Montreal Protocol on Substances that Deplete the Ozone Layer Report of the Halons Technical Options Committee December 2018 Volume 1 2018 ASSESSMENT REPORT The text of this report is composed in Times New Roman Co-ordination: Halons Technical Options Committee Composition of the report: Halons Technical Options Committee Reproduction: Ozone Secretariat Date: December 2018 Under certain conditions, printed copies of this report are available from: UNITED NATIONS ENVIRONMENT PROGRAMME Ozone Secretariat, P.O. Box 30552, Nairobi, Kenya This document is also available in portable document format from the Ozone Secretariat's website: https://ozone.unep.org/sites/default/files/Assessment_Panel/Assessment_Panels/TEAP/R eports/HTOC/HTOC_assessment_2018.pdf No copyright involved. This publication may be freely copied, abstracted and cited, with acknowledgement of the source of the material. ISBN: 978-9966-076-48-9 iii Disclaimer The United Nations Environment Programme (UNEP), the Technology and Economic Assessment Panel (TEAP) Co-chairs and members, the Technical Options Committees Co-chairs and members, the TEAP Task Forces Co-chairs and members, and the companies and organisations that employ them do not endorse the performance, worker safety, or environmental acceptability of any of the technical options discussed. Every industrial operation requires consideration of worker safety and proper disposal of contaminants and waste products. Moreover, as work continues - including additional toxicity evaluation - more information on health, environmental and safety effects of alternatives and replacements will become available for use in selecting among the options discussed in this document. -
20210311 IAEG AD-DSL V5.0 for Pdf.Xlsx
IAEGTM AD-DSL Release Version 4.1 12-30-2020 Authority: IAEG Identity: AD-DSL Version number: 4.1 Issue Date: 2020-12-30 Key Yellow shading indicates AD-DSL family group entries, which can be expanded to display a non-exhaustive list of secondary CAS numbers belonging to the family group Substance Identification Change Log IAEG Regulatory Date First Parent Group IAEG ID CAS EC Name Synonyms Revision Date ECHA ID Entry Type Criteria Added IAEG ID IAEG000001 1327-53-3 215-481-4 Diarsenic trioxide Arsenic trioxide R1;R2;D1 2015-03-17 2015-03-17 100.014.075 Substance Direct Entry IAEG000002 1303-28-2 215-116-9 Diarsenic pentaoxide Arsenic pentoxide; Arsenic oxide R1;R2;D1 2015-03-17 2015-03-17 100.013.743 Substance Direct Entry IAEG000003 15606-95-8 427-700-2 Triethyl arsenate R1;R2;D1 2015-03-17 2017-08-14 100.102.611 Substance Direct Entry IAEG000004 7778-39-4 231-901-9 Arsenic acid R1;R2;D1 2015-03-17 2015-03-17 100.029.001 Substance Direct Entry IAEG000005 3687-31-8 222-979-5 Trilead diarsenate R1;R2;D1 2015-03-17 2017-08-14 100.020.890 Substance Direct Entry IAEG000006 7778-44-1 231-904-5 Calcium arsenate R1;R2;D1 2015-03-17 2017-08-14 100.029.003 Substance Direct Entry IAEG000009 12006-15-4 234-484-1 Cadmium arsenide Tricadmium diarsenide R1;R2;D1 2017-08-14 2017-08-14 Substance Direct Entry IAEG000021 7440-41-7 231-150-7 Beryllium (Be) R2 2015-03-17 2019-01-24 Substance Direct Entry IAEG000022 1306-19-0 215-146-2 Cadmium oxide R1;R2;D1 2015-03-17 2017-08-14 100.013.770 Substance Direct Entry IAEG000023 10108-64-2 233-296-7 Cadmium -
Selective Recovery of Chromium, Copper, Nickel, and Zinc from an Acid Solution Using an Environmentally Friendly Process
Selective recovery of chromium, copper, nickel, and zinc from an acid solution using an environmentally friendly process Manuela D. Machado & Eduardo V. Soares & Helena M. V. M. Soares Abstract solution at pH 10, selective recovery of zinc (82.7% as Purpose Real electroplating effluents contain multiple zinc hydroxide) and chromium (95.4% as a solution of metals. An important point related with the feasibility of cromate) was achieved. the bioremediation process is linked with the strategy to Conclusion The approach, used in the present work, recover selectively metals. In this work, a multimetal allowed a selective and efficient recovery of chromium, solution, obtained after microwave acid digestion of the copper, nickel, and zinc from an acid solution using a ashes resulted from the incineration of Saccharomyces combined electrochemical and chemical process. The cerevisiae contaminated biomass, was used to recover strategy proposed can be used for the selective recovery selectively chromium, copper, nickel, and zinc. of metals present in an acid digestion solution, which Results The acid solution contained 3.8, 0.4, 2.8, and resulted from the incineration of ashes of biomass used in 0.2 g/L of chromium(III), copper, nickel, and zinc, the treatment of heavy metals rich industrial effluents. respectively. The strategy developed consisted of recov- ering copper (97.6%), as a metal, by electrolyzing the Keywords Chemical precipitation . Electrolysis . Heavy solution at a controlled potential. Then, the simultaneous metals . Recycling . Selective recovery. Chemical speciation alkalinization of the solution (pH 14), addition of H2O2, and heating of the solution led to a complete oxidation of chromium and nickel recovery (87.9% as a precipitate of 1 Introduction nickel hydroxide).