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Wolfgang Kaim
Wolfgang Kaim (born 13 May 1951 in Bad Vilbel, Germany) is a German chemist who held the chair of coordination chemistry at the University of Stuttgart. He is co-author of the internationally recognized book, ''Bioinorganic Chemistry'' which was awarded with the Literature Award of the German Chemical Industry. Career Kaim studied chemistry and physics at the University of Frankfurt and the University of Konstanz. His diploma thesis in physical organic chemistry was supervised by E. Daltrozzo (1974). He started working on main group radicals in Hans Bock’s group at the University of Frankfurt, where he earned his PhD in 1978. After a post-doctoral year with F. A. Cotton at Texas A&M University, supported by a postdoctoral Liebig Fellowship, he completed his habilitation for inorganic chemistry in 1982 ("Coordination Chemistry of Reduced Heterocycles"). Kaim continued his independent research career at the University of Frankfurt with a Winnacker Fellowship followed by a H ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bad Vilbel
Bad Vilbel () is a spa town in Hesse (Hessen), Germany, famous for its many mineral water springs. Bad Vilbel is the largest town in the Wetteraukreis district and part of the Frankfurt Rhein-Main urban area with its city center being located 8 km northeast of downtown Frankfurt am Main at the banks of the river Nidda. History Bad Vilbel was founded in 774 (first written document) but much older artefacts were found in the area. In 1848 during railway works, a Roman villa was unearthed with a Thermae and a Mosaic. A replica of this mosaic is presented in a modern exhibition in the spa gardens. 20th Century The town Vilbel got the label "Bad" (spa) in 1948 for its numerous mineral springs. The health spa operations stopped in the 1960s but the mineral water industry connected more springs of the Wetterau by pipelines to the bottling plant of ''Hassia'' in Bad Vilbel. The hessian government reform formed 1971/72 Bad Vilbel (with Heilsberg), Dortelweil, Gronau and Massenhe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heisenberg Fellowship
Werner Karl Heisenberg () (5 December 1901 – 1 February 1976) was a German theoretical physicist and one of the main pioneers of the theory of quantum mechanics. He published his work in 1925 in a breakthrough paper. In the subsequent series of papers with Max Born and Pascual Jordan, during the same year, his matrix formulation of quantum mechanics was substantially elaborated. He is known for the uncertainty principle, which he published in 1927. Heisenberg was awarded the 1932 Nobel Prize in Physics "for the creation of quantum mechanics". Heisenberg also made contributions to the theories of the hydrodynamics of turbulent flows, the atomic nucleus, ferromagnetism, cosmic rays, and subatomic particles. He was a principal scientist in the German nuclear weapons program during World War II. He was also instrumental in planning the first West German nuclear reactor at Karlsruhe, together with a research reactor in Munich, in 1957. Following World War II, he was appoint ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electron Transfer
Electron transfer (ET) occurs when an electron relocates from an atom or molecule to another such chemical entity. ET is a mechanistic description of certain kinds of redox reactions involving transfer of electrons. Electrochemical processes are ET reaction. ET reactions are relevant to photosynthesis and respiration. ET reactions commonly involve transition metal complexes, In organic chemistry ET is a step in some commercial polymerization reactions. It is foundational to photoredox catalysis. Classes of electron transfer Inner-sphere electron transfer In inner-sphere ET, the two redox centers are covalently linked during the ET. This bridge can be permanent, in which case the electron transfer event is termed intramolecular electron transfer. More commonly, however, the covalent linkage is transitory, forming just prior to the ET and then disconnecting following the ET event. In such cases, the electron transfer is termed intermolecular electron transfer. A famous ex ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mixed-valence
Inner sphere electron transfer (IS ET) or bonded electron transfer is a redox chemical reaction that proceeds via a covalent linkage—a strong electronic interaction—between the oxidant and the reductant reactants. In inner sphere electron transfer, a ligand bridges the two metal redox centers during the electron transfer event. Inner sphere reactions are inhibited by large ligands, which prevent the formation of the crucial bridged intermediate. Thus, inner sphere ET is rare in biological systems, where redox sites are often shielded by bulky proteins. Inner sphere ET is usually used to describe reactions involving transition metal complexes and most of this article is written from this perspective. However, redox centers can consist of organic groups rather than metal centers. The bridging ligand could be virtually any entity that can convey electrons. Typically, such a ligand has more than one lone electron pair, such that it can serve as an electron donor to both the re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Non-innocent Ligands
In chemistry, a (redox) non-innocent ligand is a ligand in a metal complex where the oxidation state is not clear. Typically, complexes containing non-innocent ligands are redox active at mild potentials. The concept assumes that redox reactions in metal complexes are either metal or ligand localized, which is a simplification, albeit a useful one. C.K. Jørgensen first described ligands as "innocent" and "suspect": "Ligands are innocent when they allow oxidation states of the central atoms to be defined. The simplest case of a suspect ligand is NO..." Redox reactions of complexes of innocent vs. non-innocent ligands Conventionally, redox reactions of coordination complexes are assumed to be metal-centered. The reduction of MnO4− to MnO42− is described by the change in oxidation state of manganese from 7+ to 6+. The oxide ligands do not change in oxidation state, remaining 2-. Oxide is an innocent ligand. Another example of conventional metal-centered redox couple is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metal Coordination
A metal (from Greek μέταλλον ''métallon'', "mine, quarry, metal") is a material that, when freshly prepared, polished, or fractured, shows a lustrous appearance, and conducts electricity and heat relatively well. Metals are typically ductile (can be drawn into wires) and malleable (they can be hammered into thin sheets). These properties are the result of the '' metallic bond'' between the atoms or molecules of the metal. A metal may be a chemical element such as iron; an alloy such as stainless steel; or a molecular compound such as polymeric sulfur nitride. In physics, a metal is generally regarded as any substance capable of conducting electricity at a temperature of absolute zero. Many elements and compounds that are not normally classified as metals become metallic under high pressures. For example, the nonmetal iodine gradually becomes a metal at a pressure of between 40 and 170 thousand times atmospheric pressure. Equally, some materials regarded as meta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gesellschaft Deutscher Chemiker
The German Chemical Society (German: ', GDCh) is a learned society and professional association founded in 1949 to represent the interests of German chemists in local, national and international contexts. GDCh "brings together people working in chemistry and the molecular sciences and supports their striving for positive, sustainable scientific advance – for the good of humankind and the environment, and a future worth living for."Gesellschaft Deutscher Chemiker (GDCh)About us, Mission Statement and History/ref> History The earliest precursor of today's GDCh was the German Chemical Society (', DChG). Adolf von Baeyer was prominent among the German chemists who established DChG in 1867; and August Wilhelm von Hofmann was the first president. This society was modeled after the British Chemical Society, which was the precursor of the Royal Society of Chemistry. Like its British counterpart, DChG sought to foster the communication of new ideas and facts throughout Germany and acros ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alfred Stock Memorial Prize
The Alfred-Stock Memorial Prize or Alfred-Stock-Gedächtnispreis is an award for "an outstanding independent scientific experimental investigation in the field of inorganic chemistry." It is awarded biennially (originally annually) by the German Chemical Society (Gesellschaft Deutscher Chemiker). The award, consisting of a gold medal and money, was created in 1950 in recognition of the pioneering achievements in inorganic chemistry by the German chemist Alfred Stock. Recipients SourceGesellschaft Deutscher Chemiker See also * List of chemistry awards This list of chemistry awards is an index to articles about notable awards for chemistry. It includes awards by the Royal Society of Chemistry, the American Chemical Society, the Society of Chemical Industry and awards by other organizations. ... References {{reflist Chemistry awards German awards Awards established in 1950 1950 establishments in West Germany ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Indian Institute Of Technology Bombay
The Indian Institute of Technology Bombay (IIT Bombay or IITB) is a public research university and technical institute in Powai, Mumbai, Maharashtra, India. It is considered as one of the best engineering universities in India and is top ranked Indian university in QS World University Rankings 2022 and 3rd in NIRF overall rankings 2022 as well as NIRF engineering rankings 2022. IIT Bombay was founded in 1958. In 1961, the Parliament decreed IITs as Institutes of National Importance. A committee formed by the Government of India recommended the establishment of four higher institutes of technology to set the direction for the development of technical education in the country in 1946. Planning began in 1957 and the first batch of 100 students was admitted in 1958. Since its establishment in Powai, the institute has physically expanded to include more than 584 major buildings with a combined area of more than 2.2 square kilometers. IIT Bombay is considered as one of the fore ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Concepción
A university () is an institution of higher (or tertiary) education and research which awards academic degrees in several academic disciplines. ''University'' is derived from the Latin phrase ''universitas magistrorum et scholarium'', which roughly means "community of teachers and scholars". Universities typically offer both undergraduate and postgraduate programs. The first universities in Europe were established by Catholic Church monks. The University of Bologna (), Italy, which was founded in 1088, is the first university in the sense of: *being a high degree-awarding institute. *using the word ''universitas'' (which was coined at its foundation). *having independence from the ecclesiastic schools and issuing secular as well as non-secular degrees (with teaching conducted by both clergy and non-clergy): grammar, rhetoric, logic, theology, canon law, notarial law.Hunt Janin: "The university in medieval life, 1179–1499", McFarland, 2008, , p. 55f.de Ridder-Symoens, Hil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Universidad De Chile
The University of Chile ( es, Universidad de Chile) is a public research university in Santiago, Chile. It was founded on November 19, 1842, and inaugurated on September 17, 1843.Fuentes documentales y bibliográficas para el estudio de la historia de Chile. Capítulo III: "La Universidad de Chile 1842 – 1879". 1. La ley orgánica de 1842 www.uchile.cl It is the oldest in the country. It was established as the continuation of the former colonial Royal University of San Felipe (1738) [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Guangzhou
Guangzhou (, ; ; or ; ), also known as Canton () and alternatively romanized as Kwongchow or Kwangchow, is the capital and largest city of Guangdong province in southern China. Located on the Pearl River about north-northwest of Hong Kong and north of Macau, Guangzhou has a history of over 2,200 years and was a major terminus of the maritime Silk Road; it continues to serve as a major port and transportation hub as well as being one of China's three largest cities. For a long time, the only Chinese port accessible to most foreign traders, Guangzhou was captured by the British during the First Opium War. No longer enjoying a monopoly after the war, it lost trade to other ports such as Hong Kong and Shanghai, but continued to serve as a major transshipment port. Due to a high urban population and large volumes of port traffic, Guangzhou is classified as a Large-Port Megacity, the largest type of port-city in the world. Due to worldwide travel restrictions at the beg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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