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Journal articles on the topic 'F-block metals'

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Author: Grafiati

Published: 10 December 2022

Last updated: 29 January 2023

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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11

Parker, T. Gannon, Amanda L. Chown, Austin Beehler, Divya Pubbi, Justin N. Cross, and Thomas E. Albrecht-Schmitt. "ChemInform Abstract: Ionothermal Synthesis of Tetranuclear Borate Clusters Containing f- and p-Block Metals." ChemInform 46, no. 12 (March 2015): no. http://dx.doi.org/10.1002/chin.201512019.

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12

Feng, Genfeng, Mingxing Zhang, Penglong Wang, Shuao Wang, Laurent Maron, and Congqing Zhu. "Identification of a uranium–rhodium triple bond in a heterometallic cluster." Proceedings of the National Academy of Sciences 116, no. 36 (August 19, 2019): 17654–58. http://dx.doi.org/10.1073/pnas.1904895116.

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The chemistry of d-block metal–metal multiple bonds has been extensively investigated in the past 5 decades. However, the synthesis and characterization of species with f-block metal–metal multiple bonds are significantly more challenging and such species remain extremely rare. Here, we report the identification of a uranium–rhodium triple bond in a heterometallic cluster, which was synthesized under routine conditions. The uranium–rhodium triple-bond length of 2.31 Å in this cluster is only 3% longer than the sum of the covalent triple-bond radii of uranium and rhodium (2.24 Å). Computational studies reveal that the nature of this uranium–rhodium triple bond is 1 covalent bond with 2 rhodium-to-uranium dative bonds. This heterometallic cluster represents a species with f-block metal–metal triple bond structurally authenticated by X-ray diffraction. These studies not only demonstrate the authenticity of the uranium–metal triple bond, but also provide a possibility for the synthesis of other f-block metal–metal multiple bonds. We expect that this work may further our understanding of the bonding between uranium and transition metals, which may help to design new d-f heterometallic catalysts with uranium–metal bonds for small-molecule activation and to promote the utilization of abundant depleted uranium resources.

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13

Chang, Yao-Pang, William Levason, and Gillian Reid. "Developments in the chemistry of the hard early metals (Groups 1–6) with thioether, selenoether and telluroether ligands." Dalton Transactions 45, no. 46 (2016): 18393–416. http://dx.doi.org/10.1039/c6dt03409h.

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14

KAKKAR, RITA, MAMTA BHANDARI, and RITU GABA. "DFT STUDY OF SOME TRIVALENT d- AND f-BLOCK METAL ION COMPLEXES OF ALLOXAN." Journal of Theoretical and Computational Chemistry 12, no. 06 (September 2013): 1350052. http://dx.doi.org/10.1142/s0219633613500521.

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Density functional calculations have been employed to elucidate the structures of some six coordinated complexes of alloxan monohydrate with some d- and f-block metals. Alloxan monohydrate may exist in the mono-ionized or di-ionized form in its complexes, and both states were investigated. It is found that when the metal ion is coordinated to three bidentate ligands, the structures are nearly trigonal prismatic, but replacement of a bidendate ligand by two monovalent ligands changes the geometry to deformed octahedral. The metal-alloxanate bonding is largely ionic for the lanthanoids. The calculated vibrational frequencies are in agreement with the experimentally determined ones.

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15

Reger, Daniel L., Andrew P. Leitner, and Mark D. Smith. "Supramolecular Metal–Organic Frameworks of s- and f-Block Metals: Impact of 1,8-Naphthalimide Functional Group." Crystal Growth & Design 16, no. 1 (December 14, 2015): 527–36. http://dx.doi.org/10.1021/acs.cgd.5b01575.

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16

Moreau, Louis, Fabio Ziarelli, Mark W. Grinstaff, and Philippe Barthélémy. "Self-assembled microspheres from f-block elements and nucleoamphiphiles." Chemical Communications, no. 15 (2006): 1661. http://dx.doi.org/10.1039/b601038e.

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17

Hosmane, Narayan S. "Recent advances in the chemistry of carboranes and metallacarboranes." Pure and Applied Chemistry 75, no. 9 (January 1, 2003): 1219–29. http://dx.doi.org/10.1351/pac200375091219.

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An overview of the syntheses, structures, and reactivity of the compounds formed by the incorporation of a number of d- and f-block metals into C2B4- and C2B9-carborane cages have been presented. In addition,the development of a safe, bench-scale preparation of the toxic and commercially unavailable polyhedral borane synthon, namely pentaborane(9), has also been described. Thus, this report discusses the latest developments leading to a sys- tematic synthetic approach to a number of carborane precursors and the subsequent reaction chemistry in the formation of a number of “carbons-apart ”metallacarboranes.

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18

Wu, Tingjuan, Anfeng Li, Kexin Chen, Xingxing Peng, Jing Zhang, Mou Jiang, Shizhen Chen, Xing Zheng, Xin Zhou, and Zhong-Xing Jiang. "Perfluoro-tert-butanol: a cornerstone for high performance fluorine-19 magnetic resonance imaging." Chemical Communications 57, no. 63 (2021): 7743–57. http://dx.doi.org/10.1039/d1cc02133h.

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With nine equivalent ¹⁹F and a modifiable hydroxyl group, perfluoro-tert-butanol has outperformed most perfluorocarbons as a valuable building block for high performance ¹⁹F MRI agents.

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19

Young, Rowan D., and Richa Gupta. "A Review on the Halodefluorination of Aliphatic Fluorides." Synthesis 54, no. 07 (November 2, 2021): 1671–83. http://dx.doi.org/10.1055/a-1684-0121.

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AbstractHalodefluorination of alkyl fluorides using group 13 metal halides has been known for quite some time (first reported by Newman in 1938) and is often utilized in its crude stoichiometric form to substitute fluorine with heavier halogens. However, recently halodefluorination has undergone many developments. The reaction can be effected with a range of metal halide sources (including s-block, f-block, and p-block metals), and has been developed into a catalytic process. Furthermore, methods for monoselective halodefluorination in polyfluorocarbons have been developed, allowing exchange of only a single fluorine with a heavier halogen. The reaction has also found use in cascade processes, where the final product may not even contain a halide, but where the conversion of fluorine to a more reactive halogen is a pivotal reaction step in the cascade. This review provides a summary of the developments in the reaction from its inception until now.1 Introduction2 Stoichiometric Halodefluorination2.1 Group 13 Halodefluorination Reagents2.2 Other Metal Halide Mediated Halodefluorination3 Catalytic Halodefluorination4 Monoselective Halodefluorination5 Cascade Reactions Involving Halodefluorination6 Summary and Outlook

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20

Zaki, Nadia G., Walaa H. Mahmoud, Ahmed M. El Kerdawy, Abanoub Mosaad Abdallah, and Gehad G. Mohamed. "Heteroleptic complexes of cocaine/TMEDA with some f block metals: Synthesis, DFT studies, spectral, thermal, cytotoxicity and antimetastatic properties." Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 229 (March 2020): 117938. http://dx.doi.org/10.1016/j.saa.2019.117938.

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21

Deblonde, Gauthier J. P., Manuel Sturzbecher-Hoehne, Anne B. Mason, and Rebecca J. Abergel. "Receptor recognition of transferrin bound to lanthanides and actinides: a discriminating step in cellular acquisition of f-block metals." Metallomics 5, no. 6 (2013): 619. http://dx.doi.org/10.1039/c3mt20237b.

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22

Pałasz, A., and P. Czekaj. "Toxicological and cytophysiological aspects of lanthanides action." Acta Biochimica Polonica 47, no. 4 (December 31, 2000): 1107–14. http://dx.doi.org/10.18388/abp.2000_3963.

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Lanthanides, also called rare-earth elements, are an interesting group of 15 chemically active, mainly trivalent, f-electronic, silvery-white metals. In fact, lanthanides are not as rare as the name implies, except for promethium, a radioactive artificial element not found in nature. The mean concentrations of lanthanides in the earth's crust are comparable to those of life-important elements like iodine, cobalt and selenium. Many lanthanide compounds show particular magnetic, catalytic and optic properties, and that is why their technical applications are so extensive. Numerous industrial sources enable lanthanides to penetrate into the human body and therefore detailed toxicological studies of these metals are necessary. In the liver, gadolinium selectively inhibits secretion by Kupffer cells and it decreases cytochrome P450 activity in hepatocytes, thereby protecting liver cells against toxic products of xenobiotic biotransformation. Praseodymium ion (Pr3+) produces the same protective effect in liver tissue cultures. Cytophysiological effects of lanthanides appear to result from the similarity of their cationic radii to the size of Ca2+ ions. Trivalent lanthanide ions, especially La3+ and Gd3+, block different calcium channels in human and animal cells. Lanthanides can affect numerous enzymes: Dy3+ and La3+ block Ca2+-ATPase and Mg2+-ATPase, while Eu3+ and Tb3+ inhibit calcineurin. In neurons, lanthanide ions regulate the transport and release of synaptic transmitters and block some membrane receptors, e.g. GABA and glutamate receptors. It is likely that lanthanides significantly and uniquely affect biochemical pathways, thus altering physiological processes in the tissues of humans and animals.

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23

Lu, Zixiu, Fangfang Zhang, Abudukadi Tudi, Zhihua Yang, and Shilie Pan. "RbB3O4F2: a rubidium fluorooxoborate with an unprecedented [B3O5F2]3− functionalized unit and a large birefringence." Chemical Communications 56, no. 97 (2020): 15333–36. http://dx.doi.org/10.1039/d0cc06851a.

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A promising DUV birefringent material, RbB₃O₄F₂, presents novel [B₃O₄F₂]⁻ chains formed by the unprecedented [B₃O₅F₂]³⁻ fundamental building block.

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24

Ivchenko, Vladimir. "Radiation Defects in HCC Materials at Atomic Spatial Level." Key Engineering Materials 781 (September 2018): 14–19. http://dx.doi.org/10.4028/www.scientific.net/kem.781.14.

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Diagnostics of the irradiated structure was carried out using the field ion microscopy technique. Modes of radiation exposure for development of amorphized states in subsurface regions of platinum are determined. It is shown that radiation exposure of pure metals with an energy of E = 30 keV under variation of the fluence of the charged argon ion beams by two orders of magnitude (1016 to 1018 ions/cm2) produces a significant effect on the kinetics of defect formation in the subsurface regions of irradiated materials. As a result of irradiation up to a higher fluence (F = 1017 ions/cm2), the effect of formation of the block nanocrystalline structure (at the block size of 1–5 nm) is observed in subsurface regions at a depth of at least 20 nm from the irradiated surface. It is found that the phenomenon of metal amorphization in the subsurface regions occurs up to a sample depth of 12 nm under an increase in the fluence to 1018 ions/cm2 and the above irradiation energies. Experimental results on atomic–spatial investigation of radiative defect formation in surface layers of materials, initiated by ion implantation (in Cu3Au: E = 40 keV, F = 1020 ion/m2, j = 10–3 A/cm2), are considered. The experimentally established average size of a radiation cluster (disordered zone) in the alloy after ion bombardment is 4 × 4 × 1.5 nm.

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25

Kuncewicz, Joanna, Janusz M. Dąbrowski, Agnieszka Kyzioł, Małgorzata Brindell, Przemysław Łabuz, Olga Mazuryk, Wojciech Macyk, and Grażyna Stochel. "Perspectives of molecular and nanostructured systems with d- and f-block metals in photogeneration of reactive oxygen species for medical strategies." Coordination Chemistry Reviews 398 (November 2019): 113012. http://dx.doi.org/10.1016/j.ccr.2019.07.009.

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26

Ferreira, Ana C., and Joaquim B. Branco. "New approach for the synthesis of nanostructured binary f-block intermetallic compounds: CO2 methanation studies." Intermetallics 108 (May 2019): 32–38. http://dx.doi.org/10.1016/j.intermet.2019.02.003.

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27

Dou, Baojie, Hang Xiao, Xiuzhou Lin, Yingjun Zhang, Shixiong Zhao, Song Duan, Xiulei Gao, and Zhiwen Fang. "Investigation of the Anti-Corrosion Properties of Fluorinated Graphene-Modified Waterborne Epoxy Coatings for Carbon Steel." Coatings 11, no. 2 (February 21, 2021): 254. http://dx.doi.org/10.3390/coatings11020254.

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Waterborne epoxy resin (WEP) has been widely used as an anti-corrosive coating for metals. However, it is still a big challenge to further improve its anti-corrosion performance due to the poor barrier properties to corrosive media. In this study, fluorinated graphene (FG) was used as a filler in WEP to improve its barrier properties, which contributes to corrosion resistance enhancement. The chemical composition and microstructures of FG and FG-modified WEP were systematically analyzed, and its corrosion resistance was also studied. Results reveal that the addition of FG sheet to WEP not only can significantly improve the tensile strength of WEP coating, but also increase the barrier properties of WEP coating and block the penetration of corrosive agent throughout the coating to the interface between coating and substrate. Meanwhile, the results also declare that the F content of FG has a significant effect on mechanical properties and long-term corrosion resistance, and the performance of FG-modified WEP coating will deteriorate with the increase of F content.

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28

Coşar, Ciprian, Amr A. A. Attia, Alexandru Lupan, and R. Bruce King. "Metal-metal multiple bonds with “half-bond” components in paramagnetic organometallics of f-block metals: Cyclopentadienyluranium carbonyls as molecular relatives of diuranium." Journal of Organometallic Chemistry 827 (January 2017): 105–11. http://dx.doi.org/10.1016/j.jorganchem.2016.11.006.

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29

Sturzbecher-Hoehne, Manuel, Taylor A. Choi, and Rebecca J. Abergel. "Hydroxypyridinonate Complex Stability of Group (IV) Metals and Tetravalent f-Block Elements: The Key to the Next Generation of Chelating Agents for Radiopharmaceuticals." Inorganic Chemistry 54, no. 7 (March 23, 2015): 3462–68. http://dx.doi.org/10.1021/acs.inorgchem.5b00033.

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30

Pérez Moncada, Urley Adrian, María Margarita Ramírez Gómez, Diana Paola Serralde Ordoñez, Andrea María Peñaranda Rolón, Wilmar Alexander Wilches Ortiz, Luciano Ramírez, and Gersain Antonio Rengifo Estrada. "Hongos formadores de micorrizas arbusculares (HFMA) como estrategia para reducir la absorción de cadmio en plantas de cacao (Theobroma cacao)." REVISTA TERRA LATINOAMERICANA 37, no. 2 (April 15, 2019): 121. http://dx.doi.org/10.28940/terra.v37i2.479.

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Colombia is among the countries of Latin America that produce about 80% of f ine or “prime” cocoa of the world; however, cocoa in Colombia has limitations related to the presence of cadmium (Cd) in some soils where it is grown and this reduces the safety of the product. The objective of this study was to evaluate the absorption of cadmium in a cocoa pattern (IMC 67) in association with arbuscular mycorrhizal fungi (AMF) to determine their potential use as Cd immobilizers in medium and long-term. A randomized complete block design with three replications and 20 treatments was established, in 4 × 5 factorial arrangement, one control, three types of mycorrhizae (Glomus macrocarpum, Rhizoglomus intraradices and AMF-native) and f ive Cd doses (0, 6, 12, 18 and 24 mg kg-1). Plant height, dry weight of stem, leaves and roots as well as Cd concentration in stems, leaves and roots were measured. The results showed that cacao plants translocate the Cd easily, that is, they can live under these conditions since it was found in all organs (stems, leaves and roots); however, the treatment inoculated with AMF‑native decreased signif icantly the accumulation of Cd in all the organs evaluated. These results conf irm the benef icial effects that AMF have to alleviate the stress that plants shows when translocating heavy metals such as cadmium.

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31

Leznoff, Daniel. "Phthalocyanines with Non-Traditional Early Transition-Metals." ECS Meeting Abstracts MA2022-01, no. 14 (July 7, 2022): 950. http://dx.doi.org/10.1149/ma2022-0114950mtgabs.

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The synthesis, spectroscopic and redox properties of new metallophthalocyanines (PcM) are active areas of research. The rings of PcM complexes can be successively reduced using chemical, electrochemical, or photochemical methods to give rise to species containing ring-reduced Pc(3-), Pc(4-) or Pc(5-) ligands ; in the other direction, both ring-oxidized Pc(-1) and Pc(0)-containing systems can be accessed. These species are usually generated and characterized in situ and have only recently begun to be isolated and structurally characterized. In particular, there are few examples of phthalocyanines with early-transition and f-block metals - despite the rich organometallic-type reactivity of these metals - and thus we targeted new PcM complexes in this underdeveloped area of the periodic table. Given their larger ionic size, the unusual structural feature of the metal centre protruding far out of the Pc cavity is observed. Hence, the exposure of the coordination sphere of these Lewis-acidic (often d0) metals makes these PcM complexes attractive catalysts; this cis-oriented axial ligation also drastically improves the solubility, despite the Pc-ring remaining unsubstituted. In this presentation the isolation and structural characterization of new PcM materials with M = scandium, zirconium, niobium and (time-permitting) molybdenum will be described, along with rare structurally characterized examples of their reduced Pc(4-) and Pc(3-)complexes. Their electronic structure and electrochemical behaviour will be discussed using a combination of spectroscopic and structural techniques. A series of moisture-sensitive, soluble PcZr(IV) and PcNb(V) alkoxides were prepared, characterized, and their catalytic activity towards the ring-opening polymerization of rac-lactide was studied and will be detailed. Reaction of PcScCl with LiO i Pr and NaO t Bu yielded two hydroxide complexes containing the PcScOH unit, obtained from the hydrolysis of the putative PcSc-alkoxide intermediate. The two structurally characterized systems have a tilted “butterfly” shape structure, reminiscent of bent metallocenes. The solubility of these early transition-metal based complexes present new opportunities for the advancement of this underdeveloped area of PcM chemistry. Time permitting, our related work on organometallic PcLnX complexes will also be described. References Zhou, D.B. Leznoff, Chem. Commun., 2018, 54, 1829-1832. W. Zhou, J.R. Thompson, C.C. Leznoff, D.B. Leznoff, Chem. Eur. J., 2017, 23, 2323-2331; R. Platel, W. Zhou, T.T. Tasso, T. Furuyama, N. Kobayashi, D.B. Leznoff, Chem. Commun., 2015, 5986-89; D. McKearney, W. Zhou, V.E. Williams, D.B. Leznoff, Chem. Commun., 2019, 55, 6696-6699; Y. Ganga-Sah, E. Tajbakhsh, R.H. Platel, W. Zhou, D.B. Leznoff, J. Porph. Phthalocyanines, 2019, 23, 1592-1602; W. Zhou, D. McKearney, D.B. Leznoff, Chem. Eur. J., 2020, 26, 1027-31.

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32

Sutorik, Anthony C., Joyce Albritton-Thomas, Tim Hogan, Carl R. Kannewurf, and Mercouri G. Kanatzidis. "New Quaternary Compounds Resulting from the Reaction of Copper and f-Block Metals in Molten Polychalcogenide Salts at Intermediate Temperatures. Valence Fluctuations in the Layered CsCuCeS3." Chemistry of Materials 8, no. 3 (January 1996): 751–61. http://dx.doi.org/10.1021/cm950438b.

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33

Orpen, A. Guy, Lee Brammer, Frank H. Allen, Olga Kennard, David G. Watson, and Robin Taylor. "Supplement. Tables of bond lengths determined by X-ray and neutron diffraction. Part 2. Organometallic compounds and co-ordination complexes of the d- and f-block metals." Journal of the Chemical Society, Dalton Transactions, no. 12 (1989): S1. http://dx.doi.org/10.1039/dt98900000s1.

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34

Davies, Noel W., Alistair S. P. Frey, Michael G. Gardiner, and Jun Wang. "Reductive disproportionation of carbon dioxide by a Sm(ii) complex: Unprecedented f-block element reactivity giving a carbonate complex." Chemical Communications, no. 46 (2006): 4853. http://dx.doi.org/10.1039/b611784h.

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35

SUTORIK, A. C., J. ALBRITTON-THOMAS, T. HOGAN, C. R. KANNEWURF, and M. G. KANATZIDIS. "ChemInform Abstract: New Quaternary Compounds Resulting from the Reaction of Copper and f- Block Metals in Molten Polychalcogenide Salts at Intermediate Temperatures. Valence Fluctuations in the Layered CsCuCeS3." ChemInform 27, no. 26 (August 5, 2010): no. http://dx.doi.org/10.1002/chin.199626033.

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36

Imyanitov, Naum S. "Periodic law: new formulation and equation description." Pure and Applied Chemistry 91, no. 12 (December 18, 2019): 2007–21. http://dx.doi.org/10.1515/pac-2019-0802.

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Abstract The atomic weight, nuclear charge, electron configuration of an atom and the total number of i-electrons in an atom belonging to i-block (i = s, or p, or d, or f) are considered as the fundamental characteristics of an element (atom). Only in the latter case, the true periodicity is achieved: the repetitions occur at regular intervals. The total number of i-electrons in an atom belonging to i-block is used as the new basis for the description of the periodicity. This made possible to propose a new formulation of the Periodic law and to describe the Periodic law by an equation. The equation provides opportunities for large-scale prediction of the properties of elements and their compounds; it does not require special knowledge to work with it. Theoretical and applied aspects of the application of the new formulation and equation are outlined. Predictions are made for proton affinity and gas phase basicity of 20 elements, constants of inductive effects of 185 atoms and groups, electronic parameters of 222 neutral ligands. The suitability of the equation is exemplified by the description of the properties of atoms and elements, such as ionization energy, electron affinity, proton affinity, electronegativity, covalent atomic radii and the enthalpy of element formations in the gas phase. The equation makes possible to describe also the properties of compounds and their fragments: the acidic properties of the hydrogen compounds of the elements, the acidic properties of protonated atoms and molecules, gas phase basicity and proton affinity of compounds, inductive effects of ligands in coordination chemistry and substituents in organic chemistry, electronic parameters of neutral ligands, the electron effect constants of coordinating metals.

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37

Elliott, Peter. "Hodgesmithite, (Cu,Zn)6Zn(SO4)2(OH)10·3H2O, a new copper zinc sulfate mineral with a unique, decorated, interrupted-sheet structure." Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials 75, no. 6 (November 14, 2019): 1069–75. http://dx.doi.org/10.1107/s205252061901343x.

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Hodgesmithite, ideally (Cu,Zn)6Zn(SO4)2(OH)10·3H2O, is a new copper zinc sulfate mineral from the Block 14 Opencut, Broken Hill, New South Wales, Australia. Electron microprobe analysis provided the empirical formula Cu4.84,Zn2.16,Cd0.04[(SO4)1.89,(SiO4)0.12]2.01(OH)9.82·3.15H2O based on 21 oxygen atoms per formula unit. Hodgesmithite is trigonal, space group P3, with a = 8.1905 (12), c = 7.0990 (14) Å, V = 412.43 (12) Å3 and Z = 1. The crystal structure of hodgesmithite, R 1 = 0.0272 for 5145 reflections with F o > 4σ(F o) measured with synchrotron X-ray radiation (λ = 0.71080 Å), contains interrupted sheets of edge-sharing Cu(O,OH)6 octahedra in the (001) plane. Every seventh octahedral site is vacant and capped by a ZnO4 tetrahedron and an SO4 tetrahedron which are attached to the sheet above and below this position. The sheets are additionally decorated on one side by SO4 tetrahedra that share a vertex incident to three Cu—O(apical) bonds. Interstitial H2O groups lie between the sheets. ZnO4 tetrahedra share vertices with SO4 tetrahedra from the adjacent sheet to provide linkage between the sheets in the c direction.

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38

Roy, Rita, Manik C. Saha, and Parag S. Roy. "Coordination chemistry of f-block elements with imine acids. Part IV. Synthetic and chiroptical studies on lanthanide(III) complexes of imine acids derived from L-alanine, L-valine, L-tyrosine and L-glutamic acid." Transition Metal Chemistry 15, no. 1 (February 1990): 51–57. http://dx.doi.org/10.1007/bf01032232.

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39

Partyka, David V. "Transmetalation of Unsaturated Carbon Nucleophiles from Boron-Containing Species to the Mid to Late d-Block Metals of Relevance to Catalytic C−X Coupling Reactions (X = C, F, N, O, Pb, S, Se, Te)." Chemical Reviews 111, no. 3 (March 9, 2011): 1529–95. http://dx.doi.org/10.1021/cr1002276.

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40

Partyka, David V. "ChemInform Abstract: Transmetalation of Unsaturated Carbon Nucleophiles from Boron-Containing Species to the Mid to Late D-Block Metals of Relevance to Catalytic C-X Coupling Reactions (X = C, F, N, O, Pb, S, Se, Te)." ChemInform 42, no. 25 (May 26, 2011): no. http://dx.doi.org/10.1002/chin.201125235.

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41

Trunova, Elena, Artem Mishchenko, and Tamara Makotryk. "SYNTHESIS AND SPECTRAL CHARACTERISTICS OF HETEROMETALLIC COMPLEXES OF Pr(III) WITH Zn(II), CO(II) BASED ON ETHYLENEDIAMINETETRAACETIC AND ETHYLENEDIAMINEDISUCCINIC ACIDS." Ukrainian Chemistry Journal 87, no. 3 (April 23, 2021): 3–17. http://dx.doi.org/10.33609/2708-129x.87.03.2021.3-17.

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New heterometallic f-d-complexes of Pr (III), Co(II), Zn(II) with aminopolycarboxylic acids (ethylenediaminetetraacetic, ethylenediaminedisuccinic acids) have been synthesized and spectroscopically characterized. It was found that complexes with a molar ratio of Pr:M3d: EDTA=1:2:2 are formed for ethylenediaminetetraacetic compounds, and that in the case of complexes based on EDDS, heteronuclear compounds of the equimolar composition Pr: M3d: EDDS = 1: 1: 1 are formed. It is shown that it is expedient to carry out the synthesis of heterometallic complexes on the basis of mononuclear polycarboxylates of 3d metals, which act as a «building block» for the preparation of a heterobinuclear compound by the exo coordination of additional metal ions. The complexes are characterized by the method of electron absorption spectroscopy. It is shown that independent of 3d-metal, for both heterometallic systems based on EDDS, a hypsochromic shift of the absorption maxima relative to νmax is observed for the homonuclear praseodymium complex. For ethylenediaminetetraacetate systems, the absorption maxima undergo both low- and high-frequency shift, which indicates the different nature of the ligand field effect, which is caused primarily by differences in the structure of the corresponding heteronuclearaminopolycarboxylates due to the presence of a chiral carbon atom in the EDDS molecule. For the supersensitive transitions Pr(III)) 3H4 →3P2 and 3H4 → 1D2 , the covalence parameters of the Ln-O bond have been calculated: oscillator power (P), nepheloxetic parameter (β), covalence parameter (b1/2), Sinha parameter (δ). Analysis of the spectroscopic parameters indicates a decrease in the covalence of the lanthanide-ligand bond in the transition from mono- to heteronuclear complex, and a decrease in the local symmetry of the lanthanide ion occurs in the order Ln (III) aqua ion <heterometallic complex <monometallic complex. Heteronuclear complexes are several orders of magnitude more stable than mononuclear ones due to the formation of additional bonds or metallacycles with donor ligand atoms. It is noted that the stability of complexes with EDDS is lower than that of the corresponding complexes with EDTA due to the different size and number of chelated metallacycles. The obtained heteronuclear complexes belong to folded complexes, in which the ligand-complexone realizes the maximum denticity to the lanthanide ion, and the coordination sphere of the 3d-cation is formed by carboxyl groups EDTA / EDDS and inner-sphere water molecules. In this case, the ions of 3d-metals are in a distorted octahedral environment, and the coordination number of Pr(III) is 8.

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42

Huang, Shu Ling. "Analysis and Assessment on Heavy Metal Contamination of Tuo River in Suzhou." Advanced Materials Research 712-715 (June 2013): 469–73. http://dx.doi.org/10.4028/www.scientific.net/amr.712-715.469.

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River sediment is a basic composition part of water environment, the heavy metal content of which is usually taken as one of the important index for the water environment quality. Taking the water quality and sediment of the Tuo River in Suzhou in this article as the main research objects, the research on pollution of heavy metals was carried out. Along the river, it is divided into S, U, F, D, O five blocks from upstream to downstream, and each area was arranged 6 to 11 sampling points unequally. The content of heavy metals (P, Hg, Al, Fe, V, Cr, Co, Zn, and Cu) which existed in the water and sediment were tested and analyzed. Moreover, heavy metal pollution of Tuo river sediment was evaluated by the methods of Geoaccumulation index and Potential ecological risk assessment.

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43

Degórska, Agnieszka. "An assessment of urban habitat contamination with selected heavy metals within the city of Katowice using the common dandelion (Taraxacum officinale Web.) as a bioindicator." Environmental & Socio-economic Studies 1, no. 4 (December 1, 2013): 29–40. http://dx.doi.org/10.1515/environ-2015-0021.

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Abstract The common dandelion (Taraxacum officinale Web.) is considered to be a good indicator species due to its wide spread and high tolerance to harsh environmental conditions. It was used in this study to assess contamination with selected heavy metals (Zn, Pb, Cd) within urban habitats of the city of Katowice (southern Poland). Samples were collected from outside the forest regions. Content of heavy metals was determined using Flame Atomic Absorption Spectroscopy (F-AAS). The soil mineralization was conducted using 50,0 cm3 10% HNO3. Determination of elemental concentrations in the plant material was carried out with the “wet” method using heating blocks for a period of 7-10 days. The following concentration ranges for individual elements in soil were found: 14,03–2049,50 mg kg−1 (Pb), 17,91–4118,00 mg kg−1 (Zn), 0,25–52,93 mg kg−1 (Cd). Concentrations within the leaves of common dandelion were: 5,52–93,04 μg g−1 (Pb), 71,71–807,15 μg g−1 (Zn), 0,10–15,69 μg g−1 (Cd). Plants from the most heavily contaminated soils were characterised by the lowest bioaccumulation coefficient. The most contaminated areas were the districts: Szopienice-Burowiec and Wełnowiec-Józefowiec, while the least contaminated were the southern districts of Katowice (i.e. Zarzecze, Podlesie). There is also a clear link between the content of heavy metals in soils examined in this study and the land use.

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44

Radoske, Thomas, Roger Kloditz, Sebastian Fichter, Juliane März, Peter Kaden, Michael Patzschke, Moritz Schmidt, Thorsten Stumpf, Olaf Walter, and Atsushi Ikeda-Ohno. "Systematic comparison of the structure of homoleptic tetradentate N2O2-type Schiff base complexes of tetravalent f-elements (M(iv) = Ce, Th, U, Np, and Pu) in solid state and in solution." Dalton Transactions 49, no. 48 (2020): 17559–70. http://dx.doi.org/10.1039/d0dt03405c.

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Tetradentate N₂O₂-type Schiff base complexes with tetravalent 4f- and 5f-block metals, [M(salpn)₂] (H₂salpn = N,N′-disalicylidene-1,3-diaminopropane; M = Ce, Th, U, Np, and Pu), were characterised both in the solid state and in solution.

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45

Zhang, Wenbin, Siru Guo, Shujuan Han, Liying Wang, Xin Zhou, Zhihua Yang, and Shilie Pan. "BaB4O5F4 with reversible phase transition featuring unprecedented fundamental building blocks of [B16O21F16] in the α-phase and [B4O6F4] in the β-phase." Chemical Communications 57, no. 34 (2021): 4182–85. http://dx.doi.org/10.1039/d1cc00701g.

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The first fluorooxoborate with reversible phase transition, BaB₄O₅F₄ with a large band gap and moderate birefringence, features the unprecedented fundamental building blocks of [B₁₆O₂₁F₁₆] in the α-phase and [B₄O₆F₄] in the β-phase.

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46

Nikolova, Valya K., Cristina V. Kirkova, Silvia E. Angelova, and Todor M. Dudev. "Host–guest interactions between p-sulfonatocalix[4]arene and p-sulfonatothiacalix[4]arene and group IA, IIA and f-block metal cations: a DFT/SMD study." Beilstein Journal of Organic Chemistry 15 (June 17, 2019): 1321–30. http://dx.doi.org/10.3762/bjoc.15.131.

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The molecular recognition in aqueous solution is extremely important because most biological processes occur in aqueous solution. Water-soluble members of the calix[n]arene family (e.g., p-sulfonato substituted) can serve as model systems for studying the nature and manner of interactions between biological receptors and small ions. The complex formation behavior of water-soluble p-sulfonatocalix[4]arene and thiacalix[4]arene and group IA, IIA and f-block metal cations has been investigated computationally by means of density functional theory computations in the gas phase and in aqueous environment. The calculated Gibbs free energy values of the complex formation reaction of these ligands with the bare metal cations suggest a spontaneous and energy-favorable process for all metal cations in the gas phase and only for Na+, Mg2+, Lu3+ cations in water environment. For one of the studied cations (La3+) a supramolecular approach with explicit solvent treatment has been applied in the study of the effect of metal hydration on the complexation process. The La3+ binding to the p-sulfonatocalix[4]arene host molecule (now in the metal’s second coordination shell) is still exergonic as evidenced by the negative Gibbs free energy values (ΔG 1 and ΔG 78). The combination of implicit/explicit solvent treatment seems useful in the modeling of the p-sulfonatocalix[4]arene (and thiacalix[4]arene) complexes with metal cations and in the prediction of the thermodynamic parameters of the complex formation reactions.

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47

László, Szabolcs. "“They Were All Looking West”: Robert F. Byrnes’s Travel Report on Hungary in 1962." Hungarian Studies Review 49, no. 2 (December 1, 2022): 224–50. http://dx.doi.org/10.5325/hungarianstud.49.2.0224.

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Abstract The primary source published here provides a rare and detailed account of a trip to state socialist Hungary in 1962, written by an American historian and expert on the Soviet Bloc, Robert F. Byrnes (1917–97). The document is prefaced by a short introduction that gives a brief presentation of Byrnes’s career and contextualizes his visit to Hungary as the representative of the Inter-University Committee on Travel Grants.

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48

Hasija, Avantika, Shubham Som, and Deepak Chopra. "Investigation of crystal structures, energetics and isostructurality in halogen-substituted phosphoramidates." Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials 78, no. 2 (March 15, 2022): 179–94. http://dx.doi.org/10.1107/s2052520622000889.

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A total of 14 compounds, one unsubstituted and 13 halogen-substituted phosphoramidates, have been synthesized from unsubstituted and halogenated (fluoro-, difluoro-, chloro-, bromo-, iodo-substituted) aniline and diphenyl phosphoryl chloride to investigate their molecular assembly in solid-state structures. Amongst them, six groups were formed based on similarities in unit-cell dimensions, space group and molecular assembly of the crystal. The analysis reveals that all the crystal structures contain robust N—H...O hydrogen bonds which are the primary building blocks with ancillary interactions such as C—H...O, C—H...π, C—H...F/Cl/Br/I, F...F, F...π, I...π, Br...π, I...O and Br...O. The role of short and directional C—H...O and C—H...π interactions providing significant stabilization to the densely packed crystalline arrangement is discussed. The contribution of these interactions in stabilizing the crystalline assembly was deduced via computing total interaction energy between dimers and the overall lattice energies using the computer programs Crystal Explorer 17.5 and PIXELC, respectively. Additionally, the occurrence of 3D isostructurality in phosphoradimates and their halogenated analogs was investigated using the XPac program. A comparison of the magnitudes of the torsion angles in the compounds substantiates the role of conformational flexibility in the solid state.

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Rajesh, John, and Kwang-Soon Ahn. "Facile Hydrothermal Synthesis and Supercapacitor Performance of Mesoporous Necklace-Type ZnCo2O4 Nanowires." Catalysts 11, no. 12 (December 13, 2021): 1516. http://dx.doi.org/10.3390/catal11121516.

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In this work, mesoporous ZnCo2O4 electrode material with necklace-type nanowires was synthesized by a simple hydrothermal method using water/ethylene glycol mixed solvent and subsequent calcination treatment. The ZnCo2O4 nanowires were assembled by several tiny building blocks of nanoparticles which led to the growth of necklace-type nanowires. The as-synthesized ZnCo2O4 nanowires had porous structures with a high surface area of 25.33 m2 g−1 and with an average mesopore of 23.13 nm. Due to the higher surface area and mesopores, the as-prepared necklace-type ZnCo2O4 nanowires delivered a high specific capacity of 439.6 C g−1 (1099 F g−1) at a current density of 1 A g−1, decent rate performance (47.31% retention at 20 A g−1), and good cyclic stability (84.82 % capacity retention after 5000 cycles). Moreover, a hybrid supercapacitor was fabricated with ZnCo2O4 nanowires as a positive electrode and activated carbon (AC) as a negative electrode (ZnCo2O4 nanowires//AC), which delivered an energy density of 41.87 Wh kg−1 at a power density of 800 W kg−1. The high electrochemical performance and excellent stability of the necklace-type ZnCo2O4 nanowires relate to their unique architecture, high surface area, mesoporous nature, and the synergistic effect between Zn and Co metals.

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50

Takeuchi, Akira, and Akihisa Inoue. "Compositional features of bulk metallic glasses analyzed with a tetrahedral composition diagram from s-, p-, d- and f-blocks." International Journal of Materials Research 103, no. 9 (September 2012): 1102–7. http://dx.doi.org/10.3139/146.110801.

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