A new phase transition in supercooled TBDA probed by low-temperature Raman study

被引：0

作者：

Dash, SK

Singh, RK

Asthana, BP ^{[1
]}

Alapati, PR

Verma, AL

机构：

[1] Banaras Hindu Univ, Dept Phys, Laser & Spect Lab, Varanasi 221005, Uttar Pradesh, India

[2] NE Reg Inst Sci & Technol, Dept Phys, Itanagar 791109, India

[3] Jai Prakash Univ, Rajendra Coll, Dept Phys, Chapra 841301, India

[4] NE Hill Univ, Dept Phys, Shillong 793022, Meghalaya, India

来源：

JOURNAL OF RAMAN SPECTROSCOPY | 1999年 / 30卷 / 02期

关键词：

D O I：

10.1002/(SICI)1097-4555(199902)30:2<81::AID-JRS348>3.0.CO;2-Z

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

Raman spectra of terephthalidenebis-p-n-decylaniline (TBDA) were recorded in the regions 925-1000 and 1120-1220 cm(-1) from room temperature down to 20 K during both cooling and heating cycles. The subtle changes in the spectral features of the bands at ca 975 and ea 1195 cm(-1) at 47 It were attributed to a hitherto unreported stable-metastable phase transition in TBDA, The dynamics of the new phase transition are explained in terms of splitting of the non-planar mode at ca 975 cm-l due to strong steric hindrances caused by increased intermolecular interactions due to close packing in the low-temperature phase. Copyright (C) 1999 John Wiley & Sons, Ltd.

引用

页码：81 / 84

页数：4

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