Synthesis, conformational studies, vibrational spectra and thermal properties, of new 1,4-(phenylenebis(methylene) bis(methyl-imidazolium) ionic liquids

被引：22

作者：

Boumediene, Mostefa ^{[1
]}

Haddad, Boumediene ^{[1
,2
,3
]}

Paolone, Annalisa ^{[4
]}

Assenine, Mohammed Amin ^{[5
]}

Villemin, Didier ^{[2
]}

Rahmouni, Mustapha ^{[3
]}

Bresson, Serge ^{[6
]}

机构：

[1] Dr Moulay Tahar Univ Saida, Fac Sci, Dept Chem, Saida, Algeria

[2] Univ Caen, ENSICAEN, LCMT, UMR 6507,CNRS, 6 Bd Ml Juin, F-14050 Caen, France

[3] Tiaret Univ, Synth & Catalysis Lab LSCT, Tiaret, Algeria

[4] CNR, UOS La Sapienza, ISC, Piazzale A Moro 5, I-00185 Rome, Italy

[5] Univ Djillali Liabes Sidi Bel Abbes, BP 89, Sidi Bel Abbes 22000, Algeria

[6] Univ Picardie Jules Verne, Lab Phys Syst Complexes, 33 Rue St Leu, F-80039 Amiens, France

来源：

JOURNAL OF MOLECULAR STRUCTURE | 2020年 / 1220卷

关键词：

Biphenylenedimethylene; Bis-imidazolium; Thermal analysis; Conformers; Raman measurements; DFT calculations; FT-RAMAN; MOLECULAR-STRUCTURE; CRYSTAL-STRUCTURE; HYDROGEN SULFATE; INFRARED-SPECTRA; IMIDAZOLIUM; CATION; DFT; STABILITY; SPECTROSCOPY;

D O I：

10.1016/j.molstruc.2020.128731

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Three new substituted dicationic ionic liquids (DILs) based on biphenylenedimethylene linked bis-1-methylimidazolium ionic liquids [bis-(PhCH(2)Mlm)(+)], combined with three anions, namely dichloride [Cl](2), di (hexafluorophosphate) [PF6-](2) and di(bis(trifluoromethylsulfonyl)Imide) [(CF3SO2)(2)N-](2) were synthesized. The three synthesized dicationic ionic liquids were characterized by Nuclear Magnetic Resonance and Fourier transform infrared (FTIR) and Raman spectroscopy in the region 4000-600 cm(-1) and 4000-45 cm(-1), respectively. A complete vibrational assignments have been performed; the biphenylene linkage spacer is confirmed by the presence of strong Raman band at 1616 cm(-1) related to the C=C vibration in all our investigated DILs. Moreover, a conformational investigation of the cation was performed by means of DFT calculations using the 6 31G** basis set and the B3LYP theory. The comparison of the computed and experimental Raman spectra further corroborate the structure of the cation. Finally, the thermal stability of the DILs was investigated by TGA and DTA measurements. The DILs with Cl-, PF6- and [(CF3SO2)(2)N-] anions decompose at 252, 323 and 420 degrees C, respectively. (C) 2020 Elsevier B.V. All rights reserved.

引用

页数：10

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