Synthesis, Characterization Of Gd@c₈₂-PVK And C₆₀-PVK, And Their Application In Electrical Memory Device

Endoheral fullerene polymers are rarely reported. In this dissertation, twodifferent polymeric derivatives C₆₀-PVK and Gd@C82-PVK were prepared byradical polymerization, obtained the polymer of moderate molecular weights(Mn)(4.15⁵.04×104g/mol) and PDI(2.4³.1), conversion rate higher than75%and good solubility in organic solvents such as toluene, THF, chloroformand DMF. The structure and properties were characterized by GPC, FTIR,UV-vis, DSC, Fluorescence Spectra and XPS prove that fullerene have beenchemically attached to the PVK chains, and the introduction of Gd@C82andC₆₀increased the thermal stability of PVK. The Tg of the polymer is related tothe content of fullerene in the polymerization process, but has no obviousrelation with the variety of fullerenes. Fluorescence Spectra show that theintroduction of fullerene led to the fluorescence quenching of PVK, prove thatGd@C82and C₆₀are a good electron acceptor. The research suggests that thepolarity of solvent, the concentration of solution and the content of fullerene had influence on the fluorescence of the polymer. The current-voltage (I-V)curve of ITO/Gd@C82-PVK/Al device was performed by semiconductorparametric analyzer, and the memory performance was researched. The I-Vcurve shows that ITO/Gd@C82-PVK/Al device has a good nonvolatilememory performance, and has good stability and repeatability.