Infrared and Raman spectra of polyethyleneglycol dimethylethers in the liquid state

Machida, Katsunosuke; Miyazawa, Tatsuo

doi:10.1016/0371-1951(64)80191-0

Cited by 76 publications

(48 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the spectra of the d-Ut(600) matrix five features centered at about 1168, 1149, 1125, 1103 and 1079 cm -1 are identified (Figure 1(A)), an indication that the POE segments are locally ordered [7]. In the FT-IR spectra of the d-Ut(600) n Eu(CF 3 SO 3 ) 3 compounds with n = 200 and 80 a pair of events, associated with the occurrence of amorphous POE chains, are seen at 1108 cm -1 and 1141 cm -1 [8,9] (Figure 1(A)). They are assigned to the νCOC mode and to the coupled νCOC and CH 2 rocking (rCH 2 ) modes, respectively.…”

Section: Ft-ir and Ft-ramanmentioning

confidence: 95%

Di-Urethane Cross-linked Poly(oxyethylene)/Siloxane Nanohybrids Doped With Eu(CF₃SO₃)₃

et al. 2004

View full text Add to dashboard Cite

Attractive sol-gel derived di-urethane cross-linked poly(oxyethylene), POE/siloxane hybrids (di-urethanesils) doped with europium triflate, Eu(CF 3 SO 3 ) 3 were examined by Fourier Transform mid-infrared (FT-IR), Raman (FT-Raman) and Photoluminescence spectroscopies with the main goal of elucidating the chemical environment of the cations in these materials. In these hybrids the POE chains contain about 13 oxyethylene repeat units. Samples with compositions ∞ > n ≥ 5 (where n indicates the ratio of (OCH 2 CH 2 ) moieties per Eu 3+ ion) were investigated. The FT-IR and FT-Raman data obtained provided unequivocal evidence that the ether oxygen atoms of the polymer chains start to interact with the Eu 3+ ions at n = 20. The presence of a crystalline POE/Eu(CF 3 SO 3 ) 3 complex was detected at n ≤ 20. Photoluminescence results demonstrated that the doped di-urethanesils studied here are room temperature (RT) efficient full-color emitters. Two distinct cation local sites were unequivocally identified at n = 200 and 20. These Eu 3+ local coordination sites involve the oxygen atoms of the urethane carbonyl groups and weakly coordinated Eu 3+ /CF 3 SO 3 ionic species. For the most concentrated hybrid (n=5) evidences of a third local-environment probably involving the oxygen atoms of the polymer chains was observed.

show abstract

Section: Ft-ir and Ft-ramanmentioning

confidence: 95%

Di-Urethane Cross-linked Poly(oxyethylene)/Siloxane Nanohybrids Doped With Eu(CF₃SO₃)₃

et al. 2004

View full text Add to dashboard Cite

show abstract

“…2 (a) and Table 2 (top)). This band ascribed to coordinated oxyethylene moieties [7,8] (Table 2 (bottom)), ascribed, respectively, to the CO stretching vibration mode and to the coupled vibration of the CO stretching and CH2 rocking modes [22][23][24]. The results of curve-fitting carried out in the vCO region of the spectra of the d-Ut(300)nEu(CF3SO3) 3 samples is represented in Fig.…”

Section: II Mono-urethanesils the Room Temperature Ft-irmentioning

confidence: 98%

“…1 (a), 2(a) and Table 2(top)) ascribed, respectively, to the vCO vibration mode of uncomplexed (OCH2CH2)-based moieties and to the coupled vibration of the vCO and rCH2 modes [22][23][24]. Curve-fitting (Fig 2(a)) allows to conclude that the frequency of the 1112 cm-I feature, characteristic of noncoordinated oxyethylene units, persists practically unchanged in the spectra of the electrolytes with n = ~o and 100.…”

Section: II Mono-urethanesils the Room Temperature Ft-irmentioning

confidence: 98%

Infrared and Raman spectroscopic investigation of Eu3+-doped mono and Di-urethanesil hybrid siliceous materials

Gonçalves

Bermúdez

Ostrovskii

et al. 2002

Ionics

View full text Add to dashboard Cite

Abstract. The general features of two series of sol-gel derived materials, designated urethanesils (Ut), have been investigated by infrared and Raman spectroscopies with the goal of elucidating the chemical environment of the Eu3+ cations.The host frameworks of the two families of onnolytes studied have been represented by mUt(350) and d-Ut(300), where m stands for mono, d stands for di, 350 and 300 are the average molecular weights of the organic precursors (poly(ethylene glycol) methyl ether, PEGME, and poly(ethylene glycol), PEG, respectively).The hybrid matrix of the mono-xerogels is composed by a siliceous backbone bonded by means of urethane linkages (-NHC (=O)O-) to pendant methyl end capped oligopolymer chains with approximately 7 oxyethylene units, whereas that of the di-xerogels is based on a siliceous network grafted through urethane groups to both ends of poly(oxyethylene) segments containing about 6 (OCH2CH2) repeat units.Both classes of materials have been doped with europium triflate (Eu(CF3SO3)3). The doped samples have been identified by m-Ut(350)nEu(CF3SO3)3 and d-Ut(300),Eu(CF3SO3), where n is the molar ratio of (OCH2CH 2) repeat units per Eu3+ ion. Materials with n ranging from ~o to 5 have been analyzed. The spectral data obtained provide evidence that the cations begin to coordinate to the ether oxygen atoms of the oligopolymer chains at n = 40 in the mono-urethanesils and at n = 10 in the di-urethanesils. In mono-urethanesils samples with n > 40 and in di-urethanesils materials with n > 10, the Eu 3+ coordinate exclusively to the carbonyl oxygen atoms of the urethane linkages.

show abstract

“…In a 50 cm3 flask, 6.1034 g (23.627 mmol) of EuCI, were added gradually to 29.0116 g (72.525 mmol) of PEG 400. The mixture was then treated at 100 "C with vigorous stirring for 3 h. The pale-yellow solution obtained, after cooling at room temperature turned very viscous and showed a EuCI, weight percentage of 21.038%.…”

Section: Synthesis Of the Systems Peo 4o0/(euc1jxmentioning

confidence: 99%

Conductivity, luminescence and vibrational studies of the poly(ethylene glycol) 400 electrolyte based on europium trichloride

Noto

Bettinelli

Furlani

et al. 1996

Macro Chemistry & Physics

View full text Add to dashboard Cite

Poly(ethy1ene glycol) 40O/(EuCl,), electrolytic complexes with 0 5 x 5 0.327 were prepared. The ionic conductivity of these systems was investigated, and the data were satisfactorily well fitted by the empirical Vogel-Tamman-Fulcher equation. Two different conductivity regions depending on the electrolytic complexes compositions were observed. The conformation of the poly(ethy1ene glycol) 400 (PEG 400) in the complexes was investigated by FT-IR and Raman spectroscopies. These investigations suggest that the PEG 400 chains in PEG 400/(EuCl3), present a TGT conformation (T = trans, G = gauche). Moreover, by laser luminescence spectroscopy it was also proved that each Eu3+ ion is coordinated by four oxygen atoms of PEG in a distorted C,, site symmetry.

show abstract

Infrared and Raman spectra of polyethyleneglycol dimethylethers in the liquid state

Cited by 76 publications

References 11 publications

Di-Urethane Cross-linked Poly(oxyethylene)/Siloxane Nanohybrids Doped With Eu(CF₃SO₃)₃

Di-Urethane Cross-linked Poly(oxyethylene)/Siloxane Nanohybrids Doped With Eu(CF₃SO₃)₃

Infrared and Raman spectroscopic investigation of Eu3+-doped mono and Di-urethanesil hybrid siliceous materials

Conductivity, luminescence and vibrational studies of the poly(ethylene glycol) 400 electrolyte based on europium trichloride

Contact Info

Product

Resources

About

Infrared and Raman spectra of polyethyleneglycol dimethylethers in the liquid state

Cited by 76 publications

References 11 publications

Di-Urethane Cross-linked Poly(oxyethylene)/Siloxane Nanohybrids Doped With Eu(CF3SO3)3

Di-Urethane Cross-linked Poly(oxyethylene)/Siloxane Nanohybrids Doped With Eu(CF3SO3)3

Infrared and Raman spectroscopic investigation of Eu3+-doped mono and Di-urethanesil hybrid siliceous materials

Conductivity, luminescence and vibrational studies of the poly(ethylene glycol) 400 electrolyte based on europium trichloride

Contact Info

Product

Resources

About

Di-Urethane Cross-linked Poly(oxyethylene)/Siloxane Nanohybrids Doped With Eu(CF₃SO₃)₃

Di-Urethane Cross-linked Poly(oxyethylene)/Siloxane Nanohybrids Doped With Eu(CF₃SO₃)₃