X-ray photoemission spectroscopy and Fourier transform infrared characterizations of C60 states in C60 doped conducting polymers

Abstract

Conducting polymer polythiophene (PT) film incorporated with C60 was prepared by electrochemical doping and diffusing injection methods. Charge transfer and the molecule-chain interaction were investigated by x-ray photoemission spectroscopy (XPS). Vibration states of the doped C60 and polymer backbone in the hybrid films were also investigated by fourier transform infrared (FTIR) reflaction absorption spectroscopy and FTIR transmission. The XPS spectral profile of the electrochemically doped sample was different from that of the casting sample, which reflects the different dopant-chain interactions in polymer films. The higher binding peaks appearing in the C 1s spectra correspond to C60 and its charged states doped in the polymer, which are closely connected with threefold t1u lowest unoccupied molecular orbital and fivefold hu higest occupied molecular orbital. FTIR transmission measurements clarified that C60 molecules were doped in the polymer film using both electrochemical doping and casting, as characteristic peaks due to the vibration modes of C60 were observed. The C60 peaks observed in the spectra for electrochemical doping and casting samples differed, which reflects the different doping states of C60. The results of XPS and FTIR suggest the conductive state of PT may be controlled by changing the ionic states of C60.

Photocorrosion Inhibition and Enhancement of Photocatalytic Activity for ZnO via Hybridization with C60

“…It could be found that the characteristic mode at 1182 cm −1 split into two peaks at about 1229 and 1162 cm −1 . These two characteristic modes (1182 cm −1 and 1428 cm −1 ) are known for being sensitive to charge transfer of C 60 , therefore, it can be concluded that the occurrence charge-transfers from ZnO to C 60 inducing the splitting and extension, the interaction by hybridization effect existed between ZnO and C 60 …”

“…It could be found that the characteristic mode at 1182 cm -1 split into two peaks at about 1229 and 1162 cm -1 . These two characteristic modes (1182 cm -1 and 1428 cm -1 ) are known for being sensitive to charge transfer of C 60, therefore, it can be concluded that the occurrence charge-transfers from ZnO to C 60 inducing the splitting and extension, the interaction by hybridization effect existed between ZnO and C 60 (14) The pore size distributions were measured by BJH desorption isotherms (Supporting Information Figure S3). There was no appreciable change for the surface area before (57.3 m 2 g -1 ) and after hybridization (56.9 m 2 g -1 ) by C60.…”

Diffusion Dynamics of the Li Ion on C60: A Direct Molecular Orbital−Molecular Dynamics Study

“…The chemistry of fullerenes consists of wide fields from basic science to technological application. − Also, it has potential utilities from electronic materials to medical pharmacy . The variety of utilities is originated in the specific properties of C 60 which can interact easily with several atoms, ions, and molecules inside and outside of C 60 .…”

Kinetics and mechanism effects of 2D carbon supports in hydrogen spillover composites

“…The spectrum of Co 1− x S/C 60 exhibited the characteristic bands of C 60 at 1428, 1182, 576, and 526 cm −1 . 20 However, compared to the reference C 60 spectrum, the first two absorption bands appeared weakened and narrowed, while the latter two bands appeared weakened and broadened (Fig. S1†).…”

“…To investigate the composition and chemical bonds, X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS) were employed to examine the impact of highenergy ball milling on the formation of the hydrogen spillover structure. Co 20 However, compared to the reference C 60 spectrum, the first two absorption bands appeared weakened and narrowed, while the latter two bands appeared weakened and broadened (Fig. S1 †).…”