A probable association of acute dystonia with gemifloxacin administration

Abstract

ABSTRACT

Synthesis of polydiphenylamine with tunable size and shape via emulsion polymerization

“…The nPDPA‐TW80 sample shows the narrowest optical band gap value (1.65 eV), followed by nPDPA‐CTAB (2.53 eV) and nPDPA‐SDS (3.69 eV), respectively, because the surfactants may act as dopant molecules. Thus, the shifting of electrons on the nPDPA backbone occurs from the new excitation band of the benzenoid to quinoid rings (π−π* transition) . As the surfactant concentration increases, the band gap value decreases because there are more surfactant molecules, or more electron density on the imine nitrogen, leading to narrowing of the excitation transition (π−π* transition), which is consistent with the UV−visible results.…”

“…The extrapolation of the straight line from the plot between ( αhν ) and hν produces an energy band gap value (Fig. (b)) . The optical band gaps of nPDPA in the presence of the surfactants are tabulated in Table .…”

“…An interaction between the imine nitrogen of nPDPA and oxygen at the hydroxyl group of TW80 can occur. This interaction stabilizes the π* orbital and reduces the energy gap between the π and π* orbitals . Thus, as the energy required for the π−π* transition decreases, nPDPA‐TW80 possesses a rather narrow band gap.…”

“…The absorption spectra of all nPDPA samples were investigated by UV−visible spectroscopy (Shimadzu, UV 1800) over wavelength numbers from 200 nm to 500 nm in the absorption mode at room temperature. The Tauc relation was used to calculate the energy band gap from the absorption spectra: …”

Emulsion-polymerized flexible semi-conducting CNCs–PANI–DBSA nanocomposite films

“…35 The increase in the band gap consequently leads to a decrease in the conductivity of the polymer which could also explain the decrease in electrical conductivity for CNCs-PANI-DBSA nanocomposites at high DBSA concentration. This hypsochromic shift is most likely due to the steric repulsion between the bulky DBSA molecules bound to polyaniline.…”