| 词汇 | transition-metal |
| 释义 | transition metal noun[ C ] chemistry specializeduk /trænˈzɪʃ.ən ˌmet.əl/ us /trænˈzɪʃ.ən ˌmet̬.əl/(alsotransition element) any of a group of metal chemical elements including copper and gold that show more than one valency (= the number of hydrogen atoms that can combine with one of its atoms to form a compound)过渡金属 Chemical elements actinium alkali metal americium astatine berkelium brimstone bromine calcium fluorine germanium iodine lithium manganese nickel plutonium quicksilver selenium silicon sodium sulphur You can also find related words, phrases, and synonyms in the topics: Chemistry: metals & metalworking Examples of transition metaltransition metal As a result, these soils contain high concentrations of oxidized transitionmetal minerals, particularly chromium and manganese, as well as perchlorate. A difficulty is that there are not many transitionmetal systems for which accurate experimental binding energies are known. Therefore, it has been most successfully applied to organic radicals and half-integer spin transitionmetal ions. Site-specific labeling of proteins with cyclen-bound transitionmetal ions. Electronic structure analysis of electron-transfer matrix elements for transitionmetal redox pairs. It is also not conceivable why hydrogen peroxide (of hypothetically biological origin) should release oxygen when humidified, without mentioning the presence of any transitionmetal salt catalysts. Enantioselective reductions of ketones may be accomplished through the use of catalytic amounts of chiral transitionmetal complexes. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. It is typically the second most abundant transitionmetal in organisms after iron and it is the only metal which appears in all enzyme classes. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. For transitionmetal compounds, the crystal field splitting diagram for square planar geometry can thus be derived from the octahedral diagram. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Transitionmetal complexes of both types of carbenes have been generated "in situ". From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. There are also transitionmetal chalcogenols which have potential to serve as catalysts and stabilize nanoparticles. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Aryl halides or triflates can be coupled with diboronyl reagents using transitionmetal catalysts. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Transitionmetal oxides are also frequently used as pigments in paints and plastics, most notably titanium dioxide. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Transitionmetal carbene complexes catalyze the olefin metathesis reaction. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. These transitionmetal electrodes offer excellent reversibility, with several hundred-thousand cycles. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. See all examples of transition metal These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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