Effect of local structure of MnCl2-filled PVDF films on their optical, electrical, electron spin resonance, and magnetic properties

Abstract

ABSTRACT:The filling level (W ) dependence of the local structure of MnCl 2 through the PVDF matrix was explored. The presence of a-and b-PVDF crystalline phases were detected by X-ray diffraction, and it was confirmed by the infrared (IR) absorption spectra. A significant head-to-head content was implied by IR spectroscopy. Two filling, level-dependent optical energy gaps were found through the UV-VIS spectral investigation. An intrachain one-dimensional interpolaron hopping mechanism was assumed to proceed in the temperature range of 350-375 K. The calculated values of the charge carrier hopping distance were in the range of 6.5-9.7 nm. The temperature dependence of the direct current (dc) magnetic susceptibility exhibited a Curie-Weiss behavior. Positive values of the paramagnetic Curie temperature ( u p ) for W up to 14.5% indicated the presence of a ferromagnetic interaction, while negative u p obtained for higher W values suggested an antiferromagnetic interaction at lower temperature. The electron spin resonance (ESR) analysis revealed the existance of both isolated and aggregated Mn 2/ ions within the PVDF matrix.

Effect of NA-light radiation on the optical gap and crystal structure of AgNO3-diffused PVDF sensor

“…This suggested that the role of MnCl 2 can be accepted if one recalls the findings (explained in Tawansi et al 10 and reported in the introduction of the present work) that characterize G2 films. The apparent noninfluence of irradiation on the crystallinity of G2 films may also arise from a shielding role of MnCl 2 .…”

“…PVDF, as a multiphase material, exhibits certain physical properties resulting from crystalamorphous interfacial effects. [5][6][7][8][9] Recently, 10 we have investigated the effect of local structure of MnCl 2 -filled PVDF films on their optical, electrical, electron spin resonance, and magnetic properties. The filling level (W) dependence of the local structure of MnCl 2 through the PVDF matrix was explored.…”

Pressure-Induced Two-Color Photoluminescence and Phase Transition of Two-Dimensional Layered MnCl2

“…13 It was concluded that MnCl 2 filled into PVDF (polyvinylidene fluoride) films exhibit minimum widths of two optical gaps. 14 Ronda et al reported that the absorption and emission of manganese dichloride exhibited a broad band, which interpreted the 4 T 1g (G) → 6 A 1g (S) crystal field transition of the Mn 2+ ion. It was also confirmed that the emission intensity and the decay time of the luminescence of MnCl 2 decrease with the increasing temperature.…”

“…found that the optical energy gap of poly­(ethylene oxide) decreased with the increase of the doping concentration of MnCl 2 . It was concluded that MnCl 2 filled into PVDF (polyvinylidene fluoride) films exhibit minimum widths of two optical gaps . Ronda et al .…”

Synthesis and characterization of a polymer–metal complex from bisphenol A polyhydroxy ether with sulfur‐bearing side‐groups

“…The metal cations include Co 2+ , Ni 2+ , Cu 2+ , Mn 2+ , Zn 2+ , Al 3+ , Ba 2+ and Ca 2+ , etc 8. Various ways were used to synthesize these PMCs, the thermal, electrical, optical and magnetic properties of which have been discussed 9…”