Boson peak in the room-temperature molten salt tetra(n-butyl)ammonium croconate -: art. no. 104303

被引：25

作者：

Ribeiro, MCC

de Oliveira, LFC

Gonçalves, NS

机构：

[1] Univ Sao Paulo, Inst Quim, Lab Espectroscopia Mol, BR-05513970 Sao Paulo, Brazil

[2] Univ Fed Juiz de Fora, Inst Ciencias Exatas, Dept Quim, BR-36036330 Juiz De Fora, MG, Brazil

[3] Univ Fed Santa Catarina, Dept Quim, BR-88040900 Florianopolis, SC, Brazil

来源：

PHYSICAL REVIEW B | 2001年 / 63卷 / 10期

关键词：

D O I：

10.1103/PhysRevB.63.104303

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Low-frequency (5-200 cm(-1)) Raman spectra of the room-temperature molten salt, tetra(n-butyl)ammonium croconate (TBCR), [(n-C4H9)(4)N](2)C5O5. 4H(2)O, are reported. TBCR is a very viscous liquid with glass transition temperature T-g=20 degreesC. According to the temperature dependence of the viscosity, TBCR has been classified as a fragile glass-forming liquid. Raman spectra of TBCR have been obtained from 360 K down to a deep supercooled state at 77 K. The boson peak is observed in the Raman spectra as long as the system is cooled below T-g. The spectra are discussed in terms of proposed theories for depolarized light scattering in glass-forming liquids.

引用

页数：8

共 79 条

[1] LOW-FREQUENCY RAMAN-SPECTROSCOPY OF SUPERCOOLED FRAGILE LIQUIDS ANALYZED WITH SCHEMATIC MODE-COUPLING MODELS [J].