Special Issue "Organoplatinum Complexes"
Deadline for manuscript submissions: closed (30 September 2014)
Prof. Dr. Axel Klein
University of Cologne, Department of Chemistry, Institute of Inorganic Chemistry, Cologne, Germany.
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Interests: transition metal complexes (including organometallic); platinum, palladium, nickel; synthesis; electrochemistry; photophysics; spectroscopy; modelling of catalytic processes
Prof. Dr. Elena Lalinde
The history of organoplatinum chemistry spans a long time period, from the early reports of Zeise or Pope and Peachey in the 19th century to today’s manifold applications of organoplatinum complexes or building blocks. On first view, the reason is simple: platinum, especially in the oxidation state +II provides very inert and thermodynamically stable Pt-C bonds and Pt2+ is (apart from Pd2+) the best ion to coordinate to olefin ligands.
Many applications of organoplatinum compounds utilize this robustness, which is even further elevated in cyclometalated compounds or units. In turn, the ease-of-use of the metalation reaction in activating H-C or X-C functions opens a vast field of synthetic organometallic chemistry. Organometallic platinum complexes or building blocks are highly amenable for use in the construction of supramolecular aggregates or hybrid materials. Such materials are often employed because of their easily tuneable (electro)luminescence. Here, the heavy and relativistic character of platinum, and thus the availability of triplet excited states, adds to the stable binding in such compounds. Pt-C bonds of organoplatinum complexes have also proved to be inert under physiological conditions; and the increased cytotoxicity compared to the established (non-organometallic) drug cisplatin and different toxicity mechanism, makes them interesting candidates for future anti-cancer drugs. On the other hand, chemists would not be chemists if they could not tune the bond strength and reactivity of Pt-C bonds, and thus render them more reactive. Therefore, in addition to the currently established use of organoplatinum complexes as slowed down models of platinum metal catalysed processes (note that palladium and rhodium are far less inert), organoplatinum complexes themselves have emerged on the scene as reactive, chemo- or stereo-selective reagents or catalysts.
Prof. Dr. Axel Klein
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- luminescent complexes and materials
- supramolecular chemistry; cytotoxicity
- structural and mechanistic studies
- reactive species in organometallic catalysis