Ulrich Kortz | |
---|---|
Born | 8 June 1963 |
Nationality | German |
Alma mater | Georgetown University |
Known for | structural inorganic chemistry, polyoxometalate chemistry |
Awards | Harold N. Glassman award; Alfred Kastler postdoctoral fellowship; |
Scientific career | |
Fields | Chemistry |
Institutions | American University of Beirut, Constructor University |
Doctoral advisor | Michael Thor Pope |
Ulrich "Uli" Kortz is a German chemist and professor, working in the area of synthetic polyoxometalate chemistry.
Ulrich Kortz obtained his education in Chemical Engineering in the period 1982–1989 and was awarded his Diplom from Darmstadt University of Applied Sciences. In the period of 1989–1995 he was working on his doctorate degree at Georgetown University in Washington, DC, under close supervision of Michael T. Pope. He spent his postdoctoral years with Dante Gatteschi at Florence University, Italy, from 1995 to 1996, and with Andre Tézé and Gilbert Hervé at Versailles University, France, from 1996 to 1997. In 1997 he was hired as assistant professor at the American University of Beirut in Lebanon, and he was promoted to associate professor in 2001. In 2002 he returned to Germany to join the newly established International University Bremen, now Constructor University, as associate professor and he was promoted to full professor in 2007.
The Kortz group ("The POM Lab") has discovered the class of polyoxopalladates(II) in 2008 with the synthesis of {Pd13As8}, [1] [2] and the class of polyoxoaurates(III) in 2010 with the synthesis of {Au4As4}. [3] Ever since they have systematically developed the field of polyoxo-noble-metalates further. [4] [5] They have also pioneered the chemistry of the wheel-shaped {P8W48} by preparing {Cu20P8W48}, which contains a highly symmetrical Cu20 core with copper(II) ions in three different coordination geometries, [6] and another highlight example was {Fe16P8W48}. [7] Kortz and his team have also discovered the dilacunary heteropolytungstate {GeW10} in 2006, [8] and systematically explored its reactivity towards transition metal ions. [9] They have also explored the reactivity of many other lacunary heteropolytungstates with d and f block metal ions, two highlight products being {Mn19Si6W60} [10] and {Ce20Ge10W100}. [11] [12] The Kortz group has also reported on POMs with interesting magnetic properties. [13] [14] In the area of catalysis, they have reported mainly on olefin epoxidation, [15] alkane/alkene oxidation, [16] as well as oxidative [17] and reductive [18] water splitting. Finally, they are also interested in the biological properties of POMs. [19] [20] [21] [22]
In chemistry, a polyoxometalate is a polyatomic ion, usually an anion, that consists of three or more transition metal oxyanions linked together by shared oxygen atoms to form closed 3-dimensional frameworks. The metal atoms are usually group 6 or less commonly group 5 and group 7 transition metals in their high oxidation states. Polyoxometalates are often colorless, orange or red diamagnetic anions. Two broad families are recognized, isopolymetalates, composed of only one kind of metal and oxide, and heteropolymetalates, composed of one or more metals, oxide, and eventually a main group oxyanion. Many exceptions to these general statements exist.
Benzothiophene is an aromatic organic compound with a molecular formula C8H6S and an odor similar to naphthalene (mothballs). It occurs naturally as a constituent of petroleum-related deposits such as lignite tar. Benzothiophene has no household use. In addition to benzo[b]thiophene, a second isomer is known: benzo[c]thiophene.
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Michael Pope, was born and educated in England. He received B.A. and D.Phil. degrees from Oxford University. He can be considered as one of the leading and most influential polyoxometalate chemists worldwide. His 1983 book entitled “Heteropoly and Isopoly Oxometalates” is the most cited reference in the field.
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The borosulfates are heteropoly anion compounds which have sulfate groups attached to boron atoms. Other possible terms are sulfatoborates or boron-sulfur oxides. The ratio of sulfate to borate reflects the degree of condensation. With [B(SO4)4]5- there is no condensation, each ion stands alone. In [B(SO4)3]3- the anions are linked into a chain, a chain of loops, or as [B2(SO4)6]6− in a cycle. Finally in [B(SO4)2]− the sulfate and borate tetrahedra are all linked into a two or three-dimensional network. These arrangements of oxygen around boron and sulfur can have forms resembling silicates. The first borosulfate to be discovered was K5[B(SO4)4] in 2012 by the research group of Henning Höppe, although the compound class as such had been postulated already in 1962 by G. Schott and H. U. Kibbel. Over 80 unique compounds are known as of 2024.
Regina Palkovits is a German chemist who is a Professor of Chemistry at the RWTH Aachen University. Her research considers heterogenous catalysis. She was elected a Fellow of the North Rhine-Westphalian Academy of Sciences, Humanities and the Arts in 2020. In 2023 she was appointed as Director at the Institute for a Sustainable Hydrogen Economy (INW) at Forschungszentrum Jülich.
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Benjamin List is a German chemist who is one of the directors of the Max Planck Institute for Coal Research and professor of organic chemistry at the University of Cologne. He co-developed organocatalysis, a method of accelerating chemical reactions and making them more efficient. He shared the 2021 Nobel Prize in Chemistry with David MacMillan "for the development of asymmetric organocatalysis".
René Peters is a German chemist and since 2008 Professor of Organic Chemistry at the University of Stuttgart.
Sigma non-innocence is a special form of non-innocence, an oxidation characteristic in metal complexes. It is mainly discussed in coordination complexes of late transition metals in their high formal oxidation states. Complexes exhibiting sigma non-innocence differ from classical Werner coordination complexes in that their bonding and antibonding orbitals have an inverted distribution of metal and ligand character. The oxidation of the ligand and a lowered charge at the metal center renders the assignment of the oxidation state non-trivial.
A ketenyl anion contains a C=C=O allene-like functional group, similar to ketene, with a negative charge on either terminal carbon or oxygen atom, forming resonance structures by moving a lone pair of electrons on C-C-O bond. Ketenes have been sources for many organic compounds with its reactivity despite a challenge to isolate them as crystal. Precedent method to obtain this product has been at gas phase or at reactive intermediate, and synthesis of ketene is used be done in extreme conditions. Recently found stabilized ketenyl anions become easier to prepare compared to precedent synthetic procedure. A major feature about stabilized ketene is that it can be prepared from carbon monoxide (CO) reacting with main-group starting materials such as ylides, silylene, and phosphinidene to synthesize and isolate for further steps. As CO becomes a more common carbon source for various type of synthesis, this recent finding about stabilizing ketene with main-group elements opens a variety of synthetic routes to target desired products.
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