Synthesis, Characterization and Ionic Conductivity of Poly[(oligoethylene oxide) ethoxysilane] and Poly[(oligoethylene oxide) ethoxysilane]/(EuCl3)0.67

Abstract

Poly[(oligoethylene oxide) ethoxysilane)] (I) and poly[(oligoethylene oxide) ethoxysilane)]/(EuCl3)0.67 (II) were synthesized by reacting tetraethoxysilane with oligo(ethylene glycol) of molecular weight 400 and oligo(ethylene glycol)400/(EuCl3)0.317, respectively. The products so obtained are very transparent and rubbery. By Fourier transform infrared and Raman spectroscopy studies and by using analytical results it was concluded that these products are crosslinked macromolecular materials where the Si atom is bonded to one OEt group and to three poly(ethylene oxide) 400 chains. Scanning electronic microscopy studies showed that the presence of EuCl3 in polymer host significantly affects the morphology of the material. Laser luminescence investigations on (II) showed that Eu3+ ion in the polymer host is accommodated in two different types of sites having a distorted C2v symmetry. Moreover, the ionic conductivity of these systems was investigated and the data were satisfactorily fitted by the empirical Vogel Tamman Fulcher equation. At 70°C the conductivities of (I) and (II) were 9 × 10−6 and 14.3 × 10−6 Ω−1 cm−1 respectively.

Synthesis and characterization of lithium and magnesium complexes based on [EDTA][PEG400] 2 and [EDTA] 3 [PEG400] 7

“…The presence of two acidic groups per polymer chain was determined by titration of the samples with NaOH. [EDTA] 3 [PEG400] 7 /(LiCl) 6.39 (MgCl 2 ) 6.16 both of which exhibited a gummy consistency. The exact salt concentrations in the bulk materials were determined by ICP-AES spectrometry as described above.…”

“…We considered the polycondensation reaction to be the most suitable synthesis route for preparing the desired EDTA-containing polyether products. As a preliminary step toward preparing [EDTA] 3 [PEG400] 7 by a condensation reaction between PEG400 and acylic chloride of EDTA, we made many unsuccessful attempts to obtain the latter derivative by conventional synthesis routes. [14][15][16] These failures prompted us to adopt a second approach in which the [EDTA] 3 -[PEG400] 7 host polymer was prepared by means of a transesterification reaction between EDTA methylic ester and PEG400 in the presence of Ti(OC 2 H 5 ) 4 as a catalyst.…”

“…[1][2][3][4] The classic polymer electrolytes consist of organic polymers, e.g., poly(ethylene oxide), poly(propylene oxide) or poly(ethyleneimine), doped with inorganic salts such as LiClO 4 , and (CF 3 SO 2 ) 2 NLi etc., and exhibit an ionic conductivity ranging from 10 À7 to 10 À4 S Á cm À1 at room temperature. [1,2] Widespread investigations have been directed towards preparation and conductivity studies of these systems with the aim of improving their electrical properties.…”

Effect of Stepwise Replacement of Non-Oxide to Oxide Group on Structural Properties ofBi2O3·LiF·B2<

“…Luminescent materials have always been studied by researchers for their wide range of applications. Noto reported the luminescence spectroscopy of some systems containing rare earth ions [16,17]. Also, bismuth ion acts as an efficient luminescent activator with applications in lasers as a sensitizer for some rare earth ions [18,19].…”

Synthesis and characterization of [PEG400-alt-DEOS]/(δ-MgCl2)0.2597 complex

“…In general, polyether macromolecules are used as organic components and siloxane, polysiloxane, or polyphosphazene derivatives are used as inorganic components. [17,18] This approach allows the design of materials exhibiting both the cation complexation and ion-pair separation Full Paper: An alternating copolymer with the formula a-hydro-o-oligo(oxyethylene)hydroxy poly[oligo(oxyethylene)oxydimethylsilylene] and a molecular weight of 9 860 was synthesized. Doping of this polymer with the extremely anhydrous salt d-MgCl 2 resulted in a new magnesium complex with the formula poly[PEG400-alt-DEOS]/ (MgCl 2 ) 0.2597 .…”