Physico-Chemical nanomaterials science

Creation of graphene and graphane layers in hybrid organic-inorganic polymers based on complex compounds of vanadium, iron and copper
Pashchenko E.O., Savchenko D.O., Kukharenko S.A., Kaidash O.M., Skorokhod S.V., Shchur N.A., Koshkin O.M.
Bakul Institute for Superhard Materials of the NAS of Ukraine. 
2 Avtozavodska Str., 04074, Kyiv, Ukraine. 
E-mail: lab6_1@ukr.net
The studying of the formation of three-dimensional cross-linked polymers of a hybrid nature from metal complexes based on vanadium, iron, and copper were conducted. It was found that the resulting spatially cross-linked polymers have a layered structure that combines planar fragments of condensed aromatic nuclei and sections of graphene-graphane structures.
Based on the comparison of XRD, IR- and Raman spectroscopy data, the regularities of changes in the number of graphene and graphane structures in the material with changes in the pressure and temperature of polymerization were established (Fig. 1) and the optimal parameters for obtaining the maximum number and maximum degree of ordering of such structures were determined.
The effect of the content and size of metal nanoclusters in the oligomer on the amount of graphene and graphane structures formed in the hybrid polymer after polymerization was also studied. It was found that the use of metal clusters with a narrow size range of 1–10 nm makes it possible to increase the content of graphene-graphane structures in the polymer in 2–2.5 times.
Fig. 1 – Change in the number of graphene and graphane structures with an increase in the polymerization temperature in metal polymers based on Cu (1), Fe (2), and V (3).
The obtained polymers have a set of characteristics that are promising from the point of view of their use for the production of sensor and photovoltaic devices with a controlled band gap and other characteristics.