Langmuir-Blodgett films containing cluster moleculesстатья
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Статья опубликована в журнале из перечня ВАК
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 29 мая 2015 г.
Аннотация:The biomimetic stable planar molecular structures organized like biomembrane electron transport chains have been generated. They contain organometallic chemically synthesized guest nanocluster molecules incorporated into inert amphiphile molecular matrix of Langmuir-Blodgett films (a "proteins in membrane" model). Such structures can serve as the base for model investigations of the mechanicms of membrane redox reactions and are promising for the development of room-temperature controlled single-electron tunneling molecular elements and systems via the creation of reproducible stable planar nanostructures with different systems of electron tunnel junctions. The double tunnel junction structure "graphite substrate-platinum Pt-5(CO)(6)(PPh3)(4) nanocluster molecule-STM tip" was studied, the effects related to single-electron tunneling and discrete electronic levels of spectrum were observed in such structures at room temperature using STM. Platinum cluster molecules appear to posses surface-active properties and on the water surface can form stable homogeneous monolayers, which can be effectively transferred onto solid-state substrates so that corresponding multilayer LB films are obtained. X-ray difractogranis recorded for those films show a number of Bragg peaks caused by layered structure of the films. Close values of intensity of the second harmonic generation measured for mono- and 11-layer LB films of platinum clusters give the evidence of the centrosymmetrical Y-type packing of cluster molecules in multilayer films. Corresponding theoretical model of cluster molecules packing in such films has been proposed.