Log in

Relevant bibliographies by topics / F-block metals

Academic literature on the topic 'F-block metals'

Author: Grafiati

Published: 10 December 2022

Last updated: 29 January 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Contents

Journal articles
Dissertations / Theses
Books
Book chapters
Conference papers
Reports

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'F-block metals.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "F-block metals"

1

Wilson, Robert J., Niels Lichtenberger, Bastian Weinert, and Stefanie Dehnen. "Intermetalloid and Heterometallic Clusters Combining p-Block (Semi)Metals with d- or f-Block Metals." Chemical Reviews 119, no. 14 (May 28, 2019): 8506–54. http://dx.doi.org/10.1021/acs.chemrev.8b00658.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Quemet, Alexandre, Rene Brennetot, Jean-Yves Salpin, Alvaro Cimas, Colin Marsden, Jeanine Tortajada, and Pierre Vitorge. "How Can f-Block Monocations Behave as Monocations of d-Block Transition Metals?" European Journal of Inorganic Chemistry 2012, no. 22 (July 4, 2012): 3551–55. http://dx.doi.org/10.1002/ejic.201200455.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Ricano, Abel, Ilya Captain, Korey P. Carter, Bryan P. Nell, Gauthier J. P. Deblonde, and Rebecca J. Abergel. "Combinatorial design of multimeric chelating peptoids for selective metal coordination." Chemical Science 10, no. 28 (2019): 6834–43. http://dx.doi.org/10.1039/c9sc01068h.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Chen, Y. K., A. Chu, J. Cook, M. L. H. Green, P. J. F. Harris, R. Heesom, M. Humphries, J. Sloan, S. C. Tsang, and J. F. C. Turner. "Synthesis of carbon nanotubes containing metal oxides and metals of the d-block and f-block transition metals and related studies." Journal of Materials Chemistry 7, no. 3 (1997): 545–49. http://dx.doi.org/10.1039/a605652k.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Parker, T. Gannon, Amanda L. Chown, Austin Beehler, Divya Pubbi, Justin N. Cross, and Thomas E. Albrecht-Schmitt. "Ionothermal Synthesis of Tetranuclear Borate Clusters Containing f- and p-Block Metals." Inorganic Chemistry 54, no. 2 (January 2, 2015): 570–75. http://dx.doi.org/10.1021/ic502461d.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Gilge, John W., and Herbert W. Roesky. "Structurally Characterized Organometallic Hydroxo Complexes of the f- and d-Block Metals." Chemical Reviews 94, no. 4 (June 1994): 895–910. http://dx.doi.org/10.1021/cr00028a003.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Shabatina, Tatyana I. "Metastable complexes of some d- and f-block metals with mesogenic cyanobiphenyls." Structural Chemistry 18, no. 4 (April 5, 2007): 511–17. http://dx.doi.org/10.1007/s11224-007-9166-x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Arnold, Polly L., and Stephen T. Liddle. "F-block N-heterocyclic carbene complexes." Chemical Communications, no. 38 (2006): 3959. http://dx.doi.org/10.1039/b606829d.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Sigel, Helmut, and Astrid Sigel. "The bio-relevant metals of the periodic table of the elements." Zeitschrift für Naturforschung B 74, no. 6 (June 26, 2019): 461–71. http://dx.doi.org/10.1515/znb-2019-0056.

Full text

Abstract:

AbstractThe bio-relevant metals (and derived compounds) of the Periodic Table of the Elements (PTE) are in the focus. The bulk elements sodium (Na), potassium (K), magnesium (Mg), and calcium (Ca) from the s-block, which are essential for all kingdoms of life, and some of their bio-activities are discussed. The trace elements of the d-block of the PTE as far as they are essential for humans (Mn, Fe, Co, Cu, Zn, Mo) are emphasized, but V, Ni, Cd, and W, which are essential only for some forms of life, are also considered. Chromium is no longer classified as being essential. From the p-block metals only the metalloid (half-metal) selenium (Se) is essential for all forms of life. Two other metalloids, silicon and arsenic, are briefly mentioned, but they have not been proven as being essential for humans. All metals of the PTE and a plethora of their compounds are used in industry and many of them are highly toxic, like lead (Pb), which is discussed as a prime example. Several metals of the PTE, that is, their ions and complexes, are employed in medicine and we discuss the role of lithium, gallium, strontium, technetium, silver, gadolinium (the only f-block element), platinum, and gold.

APA, Harvard, Vancouver, ISO, and other styles

10

Patel, Dipti, and Stephen T. Liddle. "f-Element-metal bond chemistry." Reviews in Inorganic Chemistry 32, no. 1 (June 1, 2012): 1–22. http://dx.doi.org/10.1515/revic.2012.0001.

Full text

Abstract:

AbstractCompared to the overwhelming prevalence of f-element-carbon, -nitrogen, -oxygen or -halide ligand linkages, the use of metal-based fragments as ligands is underdeveloped. This contrasts directly to the extensively developed fields of d- and p-block metal-metal complexes, which are still burgeoning. This review outlines the development of compounds that possess polarised covalent f-element-metal bonds. For this review, the f-element is defined as (i) a group 3 metal; (ii) a lanthanide metal; (iii) the actinide metals thorium or uranium. The metal is defined as: (i) a d-block transition metal; (ii) a group 13 metal (aluminium or gallium); (iii) a group 14 metal (silicon, germanium or tin); (iv) a group 15 metal (antimony or bismuth) metal. Although silicon, germanium and antimony are traditionally classified as metalloids, they are included for completeness. We focus on complexes that have been structurally authenticated by single crystal X-ray diffraction, and we highlight novel aspects of their syntheses, properties and reactivities.

APA, Harvard, Vancouver, ISO, and other styles

More sources

Dissertations / Theses on the topic "F-block metals"

1

Sze-To, Lap, and 司徒立. "The structural chemistry of coordination compounds containing d-block or f-block metals." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2010. http://hub.hku.hk/bib/B45204470.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Kilpatrick, Alexander F. R. "Bimetallic complexes of d- and f-block metals with pentalene ligands." Thesis, University of Sussex, 2015. http://sro.sussex.ac.uk/id/eprint/53914/.

Full text

Abstract:

The focus of this thesis is the synthesis and characterisation of organometallic complexes incorporating the silylated pentalene ligand, [C8H4{SiiPr3-1,4}2]2- (= Pn†), bound to more than one metal centre. In general, metals in low oxidation states from the d- and f-block of the periodic table have been selected for these bimetallic complexes, as they are potentially reactive with small molecule substrates. Chapter One introduces the pentalene molecule and its derivatives, and discusses their use as ligands in organometallic chemistry. Particular emphasis is given to the application of organometallic pentalene complexes, ranging from conducting polymers in materials chemistry to small molecule activation and catalysis. In Chapter Two the silylated pentalene ligand Pn† is used to bridge two lanthanide(II) centres in anti-bimetallic sandwich complexes of the type [Cp*Ln]2(μ-Pn†) (Ln = Yb, Eu and Sm). Magnetic measurements and electrochemical methods are used to investigate the extent of intermetallic communication in some of these systems, which show potential for the design of organometallic 'molecular-wires'. Chemical oxidation of [Cp*Yb]2(μ-Pn†) leads to dissociation into mononuclear fragments (η8-Pn†)YbCp* and [Cp*Yb]+, and reaction of [Cp*Sm]2(μ-Pn†) with CO yields (η8-Pn†)SmCp*. Rational synthetic routes to mononuclear mixed-sandwich Pn†/Cp* compounds with trivalent f-block ions (Dy, Tb and U) are also developed, and their magnetic properties are studied by SQUID magnetometry including variable-frequency ac susceptibility measurements. These studies identified (η8-Pn†)DyCp* as the first known example of a pentalene based single molecule magnet, with a closed-waist hysteresis loop observed up to 2 K. Chapter Three describes the synthesis of iron(II) complexes with silylated pentalene ligands, and efforts towards incorporating them into extended organometallic arrays and heteronuclear anti-bimetallic complexes. Six complexes have been structurally characterised including the triple-decker homobimetallic [Cp*Fe]2(μ-Pn†), and the potassium salt [Cp*Fe(η5-Pn†)][K] which is an organometallic polymer in the solid state. Chapter Four documents efforts towards the synthesis of syn-bimetallic pentalene complexes, including the first row d-block metals V, Ti and Sc. A novel synthetic route to the di-titanium bis(pentalene) 'double-sandwich' complex (Pn†)2Ti2 is developed, via chloride-bridged dimers [(η8-Pn†)Ti]2(μ-Cl)x (x = 2 and 3). The electronic and magnetic properties of the latter are investigated using EPR spectroscopy and SQUID magnetometry, and the structure and bonding in (Pn†)2Ti2 is examined using spectroscopic, crystallographic, electrochemical and computational techniques. Preliminary studies toward the synthesis of an analogous di-scandium complex were unsuccessful, however three novel complexes have been synthesised including (η8- Pn†)ScCp* which is first example of a Sc complex bearing a Pn† ligand to be characterised by X-ray diffraction. Chapter Five explores the reactivity of the double-sandwich compound (Pn†)2Ti2 prepared in Chapter Four, with small molecules which are of industrial and environmental importance. The relatively open structure of (Pn†)2Ti2 allows the formation of adducts with unsaturated small molecules CO, MeNC and CO2. In the latter case the adduct formed is unstable at room temperature and the coordinated CO2 molecule is reduced to give a bis(oxo) bridged dimer and a di-carbonyl complex. This provides the first example of small molecule activation by a di-metal bis(pentalene) double-sandwich complex. The reactivity survey of (Pn†)2Ti2 is extended in Chapter Six to other substrates; including unsaturated heteroallenes as model molecules for CO2. In the case of nonpolar heteroallenes CS2 and carbodiimide, thermally stable adducts are isolated and have been structurally characterised. Polar heteroallenes COS and organic isocyanates undergo reductive transformations to give sulfide- and carbonimidate-bridged complexes respectively. The reactivity of (Pn†)2Ti2 with organic molecules containing heteroatom-heteroatom bonds is also described; the reactions with diphenyldichalcogenides and azobenzene show the ability of the double-sandwich complex to act as a 2e- and 4e- reducing agent respectively. The rich and varied chemistry shown by (Pn†)2Ti2 is evaluated and future work is suggested.

APA, Harvard, Vancouver, ISO, and other styles

3

Zegke, Markus. "Reductive metalation of the uranyl oxo-groups with main Group-, d- and f-block metals." Thesis, University of Edinburgh, 2015. http://hdl.handle.net/1842/16186.

Full text

Abstract:

This thesis describes the reductive functionalisation of the uranyl(VI) dication by metalation of the uranyl oxo-groups (O=UVI=O), using reductants from Group I, Group II, Group IV, Group XII and Group XIII as well as from the lanthanide and actinide series of the periodic table. Chapter 1 introduces uranium and nuclear waste, and gives an introduction into uranium(V) chemistry. It further compares the chemistry of uranyl(V) to neptunyl(V), with a specific focus on solid state interactions. The chemistry of the Pacman calixpyrroles is briefly introduced. These macrocyclic ligands form the basis for the synthesis of uranyl Pacman, which represents the major uranyl complex investigated in this thesis. Chapter 2 describes the reductive and catalytic uranyl oxo-group metalation using Group XIII and Group I reagents. It presents the reductive uranyl alumination using di-(iso-butyl)-aluminium hydride and Tebbe’s reagent to form the first Al(III)- uranyl(V) oxo complexes (AlIII-O-UV=O). The chapter shows how the transmetalation of these aluminated uranyl(V) complexes with alkali metal hydrides and alkyls leads to the formation of mono-metalated alkali metal uranyl(V) complexes (MI-O-UV=O). The combination of these two reactions is developed into a catalytic synthesis of the latter. The use of elemental alkali metals is described as another pathway of accessing alkali metal uranyl(V) complexes, carried out in collaboration with Dr. Rianne M. Lord. Chapter 3 describes the synthesis of the first Group IV uranyl(V) complexes, using low-valent titanium and zirconium starting materials. The chapter includes magnetic measurements on the first Ti(III)-uranyl(V) complex and a comparison of computational results regarding a selection of uranyl(V) complexes from this thesis. The magnetic measurements were carried out by Dr. Alessandro Prescimone, University of Edinburgh, and analysed by Dr. Nicola Magnani, Institute for Transuranium Elements, Karlsruhe, Germany. Theoretical calculations were carried out by Xiaobin Zhang and Prof. Dr. Georg Schreckenbach, University of Manitoba, Canada. The chapter further describes the reductive metalation of uranyl using elemental Mg, Ca and Zn and their respective metal halides. Chapter 4 describes the uranyl functionalisation using f-elements and their complexes. It describes the attempted mono-metalation using lanthanides and the formation of a Sm(III)-bis(uranyl(V)) complex. It further describes the uranyl reduction using actinides and the synthesis of the first U(IV)-uranyl(V) complex. The chapter further describes the first Np(IV)-uranyl(V) complex and the attempted synthesis of a Pu(IV)-uranyl(V) complex. These syntheses were performed in collaboration with Michał S. Dutkiewicz at the Institute for Transuranium Elements (ITU) in Karlsruhe, Germany. This work was carried out with the help of Dr. Christos Apostolidis and Dr. Olaf Walter and supervised by Prof. Dr Roberto Caciuffo. Chapter 5 describes the reductive uranyl functionalisation in a redox-active dipyrromethene ligand, collaboratively carried out with James R. Pankhurst and Lucy N. Platts. The synthetic work and analyses were performed jointly with Lucy N. Platts (master student under the supervision of the author); UV-vis spectra and cyclic voltammograms were recorded by James R. Pankhurst and Lucy N. Platts. The chapter presents the synthesis of a new uranyl(VI) complex and its two-electron reduction to uranium(IV) using a titanium(III) reductant. Additionally the chapter describes the reductive uranyl silylation in a dipyrromethane complex of which the ligand was designed by Dr. Daniel Betz. Section 6 describes the synthetic procedures. Section 7 gives references to the work of others. Section 8 shows the publication related to this thesis. Section 9 is a table of the complexes described in this thesis.

APA, Harvard, Vancouver, ISO, and other styles

4

Stegmaier, Saskia [Verfasser], Thomas F. [Akademischer Betreuer] Fässler, Hubert [Akademischer Betreuer] Schmidbaur, and Karsten [Akademischer Betreuer] Reuter. "Clusters and Networks of Tetrel Elements and Late d Block Metals in Ternary Intermetallic Phases with Alkali and Alkaline Earth Metals / Saskia Stegmaier. Gutachter: Thomas F. Fässler ; Hubert Schmidbaur ; Karsten Reuter. Betreuer: Thomas F. Fässler." München : Universitätsbibliothek der TU München, 2012. http://d-nb.info/1051935032/34.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Boyko, Marina [Verfasser], Thomas F. [Akademischer Betreuer] Fässler, Thomas F. [Gutachter] Fässler, and Tom [Gutachter] Nilges. "Polar Intermetallics at the Border Between Hume-Rothery and Zintl Phases : Investigations in the Systems Alkali Metal – Tin with Late Transition and p-Block Metals / Marina Boyko ; Gutachter: Thomas F. Fässler, Tom Nilges ; Betreuer: Thomas F. Fässler." München : Universitätsbibliothek der TU München, 2019. http://nbn-resolving.de/urn:nbn:de:bvb:91-diss-20190930-1516421-1-7.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Germeroth, Anne Inger. "Reactivity of electropositive f-block metal N-heterocyclic carbene complexes." Thesis, University of Edinburgh, 2013. http://hdl.handle.net/1842/9519.

Full text

Abstract:

The combination of Lewis acidic f-block metals and a labile nucleophilic carbene can be an excellent means to activate small molecules such as silanes, CO2 and other traditionally inert substrates. Furthermore, bidentate alkoxy-NHC ligands have shown promise in the support of unusual high oxidation state organometallic complexes, including examples of CeIV, PdIV and UVI. In this thesis the synthesis and reactivity of a series of f-block metal NHC complexes is described. Chapter One introduces N-heterocyclic carbenes and their f-block metal complexes, in particular of cerium, praseodymium and uranium. Furthermore, it will give an overview of small molecule activation by NHCs, lanthanides and specifically [Ce(LAr)N"], (L = OC(CH3)2CH2(CNCH2CH2NMes) the magnetic properties and use of lanthanides e.g. as single molecule magnets and oxo-functionalisation of the uranyl moiety. Chapter Two describes the addition-elimination reaction chemistry of CeIII and UIV NHC complexes in which polar reagents add in a heterocyclic fashion across the MNHC bond. It also describes the synthesis of the lithium salt of the alkoxycarbene proligand [LiLAr]4 and its reactivity towards f-element halide and aryloxide salts. A series of reactions to target the formation of metal-metal bonds is described. Chapter Three focuses on the synthesis of novel cerium and praseodymium complexes [Pr(LAr)N"2], [Pr(LAr)2N"], [Pr(OAr2,6-tBu)3] and [Ce(OAr2,6-tBu)3] and their reactivity towards oxidants. A series of alkoxide bridged lanthanide dimers [(Cl)Ce(μ- LAr)2Ce(Cl)2], [N"(LAr)Ce(μ-OAr2,6-tBu)OAr2,6- 2Ce(LAr)N"] and [N"(Cl)Pr(μ LAr)2Pr(Cl)N"] have been made and characterised including by SQUID variable temperature magnetometry. Chapter Four evaluates the synthesis and reactivity of uranyl complexes [UO2(LAr)2], [UO2N"2(py)2] and [UO2(OAr2,6-tBu)2(py)2], specifically their reactivity towards haloboranes in different solvents. Additionally, the oxo-functionalisation of uranyl compounds with haloboranes is discussed. Chapter Five draws conclusions and provides a summary of the work presented. Chapter Six comprises the experimental details and analytical data.

APA, Harvard, Vancouver, ISO, and other styles

7

Woodman, Timothy J. "Formation, stabilisation and reactivity of D- and F-block metal cations." Thesis, University of Warwick, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.300388.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Rudd, Martin D. "Macrocyclic complexation of cationic f-block (lanthanide) and p-block (groups 14 and 15) metal species." Thesis, University of Warwick, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.282539.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Mydlowski, Christopher Michael. "Aminopolycarboxylate complexes of d- and f- block metal ions : a synthetic and structural study." Thesis, University of Manchester, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.496326.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Figuerola, i. Silvestre Albert. "Compostos moleculars mixtos d'ions del bloc "f" i "d": Estudi del comportament magnètic." Doctoral thesis, Universitat de Barcelona, 2005. http://hdl.handle.net/10803/2774.

Full text

Abstract:

En el treball descrit en aquesta Memòria s'han preparat, caracteritzat estructuralment i estudiat des d'un punt de vista magnètic diferents sistemes de base molecular mixtos d'ions del bloc f i d emprant en tots els casos Ln(NO3)3·xH2O, on Ln3+ = qualsevol ió lantànid en estat d'oxidació +3, K3[M(CN)6], on M3+ = Fe, Co, Cr, com a reactius de partida mesclats en dissolució aquosa. L'addició, en cada cas, de diferents lligands bloquejants com ara la N,N'-dimetilformamida o la 2,2'-bipiridina, així com la pròpia naturalesa dels ions Ln3+ i M3+, ha donat lloc a sistemes de diferent nuclearitat i/o dimensionalitat: sistemes dinuclears, trinuclears i monodimensionals sempre amb lligand pont cianur.

Tenint en compte que fins a l'actualitat no existeix cap model que inclogui simultàniament l'efecte de l'acoblament espín-òrbita, l'efecte de la simetria del camp cristal·lí i l'intercanvi magnètic descrit pel tensor anisòtrop J, l'estudi de la interacció magnètica existent entre cadascun dels ions Ln3+ i l'ió Fe3+ en tot aquest conjunt de diferents compostos s'ha pogut estudiar mitjançant l'aplicació d'una aproximació qualitativa que permet desxifrar la naturalesa de la interacció encara que no la seva magnitud. L'aplicació del mètode ha permès estudiar l'evolució de la interacció magnètica al llarg de la sèrie d'ions lantànid(III) combinats amb l'ió ferro(III) i observar-ne la seva dependència respecte de factors externs a la naturalesa de l'ió Ln3+, al contrari del que O.Kahn et al. proposaren al 1993 en afirmar que la interacció d'un ió Ln3+ amb l'ió Cu2+ depenia única i exclusivament del mode d'acoblament entre el moment angular d'espín i l'orbital d'un mateix ió Ln3+.

La presència d'acoblament espín-òrbita en la majoria d'ions Ln3+ provoca un allunyament significatiu del valor del factor g d'aquests ions respecte del valor del factor g corresponent a l'electró lliure (2,0023). A més, la presència d'entorns cristal·lins sovint de baixa simetria provoquen una anisotropia magnètica en aquests compostos fàcilment observable a baixa temperatura, on els valors de M no segueixen la llei de Curie. L'anisotropia magnètica dels sistemes més simples (compostos dinuclears LaFe, CeCo i CeFe) va ser estudiada mitjançant mesures magnètiques de monocristall i de ressonància paramagnètica electrònica de monocristall (rpe). Tant una tècnica com l'altra van permetre confirmar la presència d'acoblament magnètic entre els ions Ce3+ i Fe3+ en el compost dinuclear CeFe, corroborant el que ja apuntava l'aplicació del mètode qualitatiu anterior per a aquest sistema. A més les magnituds i direccions de les tres components dels tenors g per als ions Ce3+ i Fe3+ van ser determinades independentment mitjançant els espectres de rpe de monocristall dels compostos dinuclears CeCo i LaFe respectivament.

La utilització de Gd3+ com a ió Ln3+ i de [Cr(CN)6]3- enlloc de [Fe(CN)6]3- en la síntesi de nous compostos mixtos 3d-4f ha simplificat molt l'estudi magnètic d'aquest tipus de sistemes ja que l'ió Gd3+ no presenta acoblament espín-òrbita, al contrari de la resta d'ions Ln3+ paramagnètics, i l'ió Cr3+ és especialment isòtrop. Això ha permès ajustar les dades magnètiques d'aquests compostos mitjançant l'ús d'un Hamiltonià d'espín isòtrop obtenint valors de la constant isòtropa d'intercanvi magnètic iguals o inferioirs a 1 cm-1, valors previsibles tenint en compte les característiques dels sistemes 3d-4f.

Finalment l'intent de sintetitzar compostos mixtos d-f d'elevada nuclearitat ha donat lloc a un sistema amb estructura tipus clúster amb un ió Ce4+ diamagnètic central, amb un paper fonamental com a ió plantilla, envoltat de vuit ions Mn3+ als quals s'uneix mitjançant múltiples lligands pont oxo. Els ions Mn3+, units mitjançant lligands pont carboxilat, mostren una interacció ferromagnètica entre ells. Paral·lelament s'obtingueren dos compostos triangulars amb tres ions Cr3+ i amb un lligand pont oxo central cadascun: el primer completament simètric mentre que el segon presenta una distorsió que dóna lloc a un triangle de simetria isòsceles. La geometria dels compostos en determina les propietats magnètiques i per aquest motiu només pot observar-se el fenomen de frustració d'espín en el primer dels dos compostos.
Different kinds of mixed "d"-"f" molecular compounds with cyanide bridges have been obtained, structurally characterized and magnetically studied in this work. Depending on the nature of the blocking ligand added in the reaction media, and on the nature of the lanthanide(III) ion and the transition ion as well, dinuclear, trinuclear or monodimensional compounds were formed.

Up to now there is no suitable model that includes the spin-orbit coupling, the crystal field effect and the anisotropic magnetic superexchange between d and f paramagnetic ions. For this reason a qualitative approach was used in order to guess which is the nature of the magnetic interaction between each of the Ln3+ ions and the Fe3+ ion in these compounds, even if we cannot measure its magnitude.

The low symmetry crystal environment of most of the lanthanide(III) ions gives rise to a high magnetic anisotropy at low temperature. The anisotropy of the simplest dinuclear systems presented in this work (LaFe, CeCo and CeFe) has been studied by single crystal magnetic measurements and single crystal epr spectra. The magnitudes and directions of the three components of the g tensors for the Ce3+ and Fe3+ ions have been independently determined using the single crystal epr spectra of the CeCo and LaFe compounds respectively.

The use of Gd3+ as the Ln3+ ion and the substitution of the [Fe(CN)6]3- by [Cr(CN)6]3- in the synthesis of new compounds has simplified the magnetic study of these systems since Gd3+ has no spin-orbit coupling and Cr3+ is a very isotropic ion. We fitted the magnetic data for two of these compounds using an isotropic spin Hamiltonian and we obtained values for the magnetic exchange constant (J) between 0.5 and 1 cm-1, the expected values for this kind of systems.

Finally our attempt to synthesize new mixed d-f high-nuclearity compounds gave rise to a cluster-like structure compound with one diamagnetic Ce4+ ion, showing a template role, sorrounded by eight Mn3+ ions ferromagnetically coupled between them. Two chromium(III) triangular systems have been also obtained, which show presence or lack of spin frustration depending on the symmetry of the molecule in each case.

APA, Harvard, Vancouver, ISO, and other styles

Books on the topic "F-block metals"

1

Jones, Chris J. D- and f-block chemistry. New York: J. Wiley, 2002.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

2

Chemistry of the f-block elements. Australia: Gordon & Breach, 2001.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

3

Rudd, Martin D. Macrocyclic complexation of cationic f-block (lanthanide) and p-block (groups 14 and 15) metal species. [s.l.]: typescript, 1994.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

4

Davies, A. G., E. W. Abel, Chris J. Jones, J. Derek Woollins, and David Phillips. D- and F-Block Chemistry. Royal Society of Chemistry, The, 2007.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

5

Aspinall, Helen C. Chemistry of the F-Block Elements. CRC Press LLC, 2018.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

6

Aspinall, Helen C. Chemistry of the F-Block Elements. CRC Press LLC, 2018.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

7

Aspinall, Helen, and Helen C. Aspinall. Chemistry of the f-Block Elements (Advanced Chemistry Texts, Volume 5). Taylor & Francis, 2001.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

8

D-And F-Block Chemistry (Tutorial Chemistry Texts). Royal Society of Chemistry, 2000.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

Book chapters on the topic "F-block metals"

1

Orpen, A. G., L. Brammer, F. H. Allen, D. G. Watson, and R. Taylor. "Typical interatomic distances: organometallic compounds and coordination complexes of the d- and f -block metals." In International Tables for Crystallography, 812–96. Chester, England: International Union of Crystallography, 2006. http://dx.doi.org/10.1107/97809553602060000622.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Schulz, Stephan. "Organoaluminum Complexes with Bonds to s-Block, p-Block, d-Block, and f-Block Metal Centers." In Modern Organoaluminum Reagents, 59–90. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/3418_2012_33.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Hosmane, N. S., and J. A. Maguire. "Metallacarboranes of d- and f-Block Metals." In Comprehensive Organometallic Chemistry III, 175–264. Elsevier, 2007. http://dx.doi.org/10.1016/b0-08-045047-4/00046-7.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Rodger, Alison, and Mark Rodger. "Complexes of Transition Metals and f-Block Elements." In Molecular Geometry, 105–37. Elsevier, 1995. http://dx.doi.org/10.1016/b978-0-7506-2295-0.50010-8.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Barrett, Jack, and Mounir A. Malati. "Chemistry of the d and f Block Metals." In Fundamentals of Inorganic Chemistry, 257–85. Elsevier, 1998. http://dx.doi.org/10.1016/b978-1-898563-38-9.50017-7.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Soni, P. L., and Vandna Soni. "Inner Transition or f-block Elements: The Lanthanides." In The Chemistry of Coordination Complexes and Transition Metals, 345–58. CRC Press, 2021. http://dx.doi.org/10.1201/9781003183426-24.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Tonks, Ian A. "Volume 10 and 11: Applications II. d- and f- Block Metal Complexes in Organic Synthesis." In Reference Module in Chemistry, Molecular Sciences and Chemical Engineering. Elsevier, 2022. http://dx.doi.org/10.1016/b978-0-12-820206-7.00168-2.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "F-block metals"

1

Roy, Ting, Kamel Ben Naceur, Manjinder Singh, Daniel Markel, Leonard Harp, Hifzi Ardic, Christian Wilkinson, and Indranil Roy. "Design of a 750 °F, 15 K packer for Enhanced Geothermal Systems, Supercritical CO2 - Sequestration and SAGD: Energy Transition Through Technology Synthesis." In Offshore Technology Conference. OTC, 2022. http://dx.doi.org/10.4043/31895-ms.

Full text

Abstract:

Abstract Several technology building blocks are required for the growth of geothermal energy to match what is needed to enable the energy transition. One key technology required in this field is a reliable packer that can withstand the extreme environments frequently seen in geothermal wells: elevated temperatures (750°F/400°C); high differential pressures (up to 15K psi); and extremely corrosive fluids. The authors present a concept which is thought to offer a promising solution to this challenge. It builds upon the wealth of experience obtained by operators designing packers for the oil and gas wells and couples this with advancements in materials processing technology in elastomers, composites, and metals. The presented concept uses the sealing advantages that elastomers are known to offer, with a compound specifically designed by a strategic partner. This elastomer is then surrounded by a layer of flexible gel-insulation of extremely low thermal conductivity to shield it from the intense heat seen in geothermal wells. It is predicted that the elastomer core will see temperatures no higher than 400°F when the surrounding environment is at 750°F. The system is then encased in a Grain Boundary Engineered (GBE) nano-metallic flexible skin material to prevent contact with corrosive fluids. Though the elements are the greatest challenge, the other components of the packer design are also specially designed with material processing techniques tailored to both enhance mechanical properties and corrosion resistance. The technology behind the design is detailed and has been proven. The integrated concepts will be further tested at subcomponent level to show their merit, before integration into a full system for qualification to 750°F, 15K psi.

APA, Harvard, Vancouver, ISO, and other styles

2

Nagar, Arvind. "Fatigue Damage at Open Holes in Laminated Composite Under Thermo Mechanical Loads." In ASME 2002 Engineering Technology Conference on Energy. ASMEDC, 2002. http://dx.doi.org/10.1115/etce2002/cmda-29080.

Full text

Abstract:

The high temperature composites have been studied for applications to secondary structures due to their light weight and thermal resistance. Relatively few studies have been conducted to consider them for primary structural load bearing capabilities. These studies focused on titanium matrix composites to characterize their material behavior [1], unidirectional [2], simple loading conditions [3, 4] in a laboratory environment or unrealistic structural geometry [5]. The purpose of this work was to study fatigue damage and determine fatigue life in titanium matrix composite panels at unloaded fastener holes subjected to thermo-mechanical fatigue loads with variable amplitudes and temperature ranges. The test panels were machined from a prefabricated structural component with pre-drilled fastener holes. The test material was a 32 ply, quasi-isotropic, approximately .224 inch thick titanium matrix laminated composite with SCS-6 fibers and Ti-15-3 metal matrix. The material was HIP consolidated followed by slow cool to room temperature. The thermal zone area was 2 inches long along specimen length and 1.875 inch wide with a .3125 inch fastener hole at the center of the thermal zone. All specimens were machined using a 3-D water jet cutter. The test system consisted of a closed loop servo-hydraulic 30 Kip test system equipped with an MTS model 458 control system, a 486 PC containing a Keithley Metrabyte DAS 1601 computer card. The specimens were gripped using MTS model 647 side load hydraulic wedge grips equipped with surfalloy grip surface. The thermal loads were provided by an Ameritherm 5 kilowatt induction power supply and a total temperature instrumentation model MC-125 temperature controller. The temperature controller was equipped with analog set point and recorder output of temperatures with both set for 1–5 volt signal levels for 0 to 1832 F. The computer generated the temperature and load profiles and monitored error band for temperature. The computer system was set to null pace the temperature and loads if the temperature exceeded a 18 degree F variation. In effect all processes would hold until the temperature error returned inside the error band. This temperature error control was accomplished by comparing the command signal to the temperature controller to the process temperature signal from the temperature controller. The nominal uniform temperature zone was one inch long centered at the specimen geometric center and maintained required temperatures within 10 degrees. The variations in temperatures along the crack line were controlled to with in 5 degrees. Cooling blocks were attached to the test samples at the end of uniform sections near the fillet blend. These blocks were cooled with water passages and compressed air was passed through holes in the blocks and impinged on the samples to provide additional cooling at the end of the thermal ramp during cool -down. The air was turned on by the computer at about 400 degrees F during each block. On all notched test samples, an extensometer was mounted across the center flaw to obtain load-deflection data (COD). The optical crack lenth measurements were made using a 20 X Gaertner traveling microscope. The load versus crack mouth opening displacement readings were taken to compare with the optical measurements of the crack length. The thermomechanical load spectrum was developed from the distribution and frequency of loading that the airframe will experience based on the design service life and typical design usage. The loads and environmental spectra are used to develop design flight by flight stress environment spectra. The data and failure surfaces were analyzed to study the high stress and low stress failure, environmental degradations, surface cracks in matrix and the effect of notch on crack initiation failure mechanism. During this investigation it was observed that the most difficult task in thermomechanical fatigue testing is to control the cooling rate as required by the thermal profile. The results show that the fatigue life depend on the applied maximum stress, increased temperatures and hold levels of both the loads and the temperatures. The variation in experimental fatigue life is with in the order of magnitude typical of fatigue data considering the complexity of the test and loading conditions. The SEM photographs and micrographs showed that in titanium matrix composite, the mode of cracking is under partial bridging of fibers at the matrix crack. The COD data was of little use for totally automated measurements when comparing with the crack sizes measured.

APA, Harvard, Vancouver, ISO, and other styles

3

Le Nevé, Charles, Sophie Loyan, Léonard Le Jeune, Steve Mahaut, Serge Demonte, Daniel Chauveau, Romain Renaud, Manuel Tessier, Nicolas Nourrit, and Anthony Le Guellaut. "High Temperature Hydrogen Attack: New NDE Advanced Capabilities — Development and Feedback." In ASME 2019 Pressure Vessels & Piping Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/pvp2019-94001.

Full text

Abstract:

Abstract In petroleum industry, hydrogen is used in many assets. With temperature and pressure, hydrogen can damage materials. This damage is called High Temperature Hydrogen Attack (HTHA) and is a time dependent degradation mechanism that can affect the integrity of steels used for pressure containment operating above about 400°F (204°C). HTHA has caused major accidents in Petroleum Industry. API RP 941 [1] currently provides guidance for steel selection (and so susceptibility to attack) in relation to temperature and ppH2 via Nelson curves. In the last edition, 4 stages of degradation for both base metal and weld metal are described. In the past, only stage III was detectable by the combination of different Ultrasonic methods which were known as AUBT – Advanced Ultrasonic Backscatter Technique. But, capability of detection was limited to defects above 500–1000μm, correspondent to small fissures. So, it was impossible to detect early stage of degradation as steel grain size (around 50μm). For several years, performances of non-destructive techniques have rapidly increased and new advanced ultrasonic technologies are available such as: - Phased Array Ultrasonic Techniques (PAUT) - Time Of Flight Diffraction (TOFD) - Total Focusing Method (TFM) This paper describes latest techniques and results obtained by Total and French Welding Institute in laboratory, and discuss the efficiency of the methods, over real HTHA degradation blocks. An overview of TFM is also proposed by CEA who work on innovating development to increase the performance of this technique.

APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "F-block metals"

1

Hay, Benjamin P., David M. Roundhill, Robert Treat Paine, Jr, Kenneth N. Raymond, Robin D. Rogers, James E. Hutchison, David A. Dixon, Gregg J. Lumetta, and Brian M. Rapko. Architectural Design Criteria for F-Block Metal Ion Sequestering Agents. Office of Scientific and Technical Information (OSTI), June 1999. http://dx.doi.org/10.2172/827036.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Hay, Benjamin P., David A. Dixon, Gregg J. Lumetta, Brian M. Rapko, David M. Roundhill, R. D. Rogers, James E. Hutchison, R. T. Paine, and Kenneth N. Raymond. Architectural Design Criteria for f- Block Metal Ion Sequestering Agents--Final Report. Office of Scientific and Technical Information (OSTI), June 2000. http://dx.doi.org/10.2172/15001497.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

BP Hay, DA Dixon, GJ Lumetta, BM Rapko, DM Roundhill, RD Rogers, JE Hutchison, RT Paine, and KN Raymond. Architectural Design Criteria for f-Block Metal Ion Sequestering Agents Final Report. Office of Scientific and Technical Information (OSTI), June 2000. http://dx.doi.org/10.2172/756591.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Hay, B. P., R. T. Paine, and D. M. Roundhill. Architectural design criteria for f-block metal sequestering agents. 1997 annual progress report. Office of Scientific and Technical Information (OSTI), June 1997. http://dx.doi.org/10.2172/12612.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Hay, B. P., D. A. Dixon, D. M. Roundhill, R. D. Rogers, R. T. Paine, and K. N. Raymond. Architectural design criteria for f-block metal ion sequestering agents. 1998 annual progress report. Office of Scientific and Technical Information (OSTI), December 1998. http://dx.doi.org/10.2172/12613.

Full text

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!