Spectroscopic evidence for a continuous change in molecular and crystal structure: deformation of biphenyl in the low temperature solid

✍ Scribed by Peter S. Friedman; Raoul Kopelman; Paras N. Prasad

• Publisher: Elsevier Science
• Year: 1974
• Tongue: English
• Weight: 243 KB
• Volume: 24
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(74)80201-0

✦ Synopsis

A Raman temperature study of biphcnyl-hro and biphcnyld ,o crystals reveals 3" unusulll spec1ral chulge over ;I wide temperature repion. Mor~_v internal nnd es~rnal infrnretl-octivc modes nppenr grodrro/I~~ ns rhc temperature is lowered from about 75 to 1.5" K. We inrerprel this ils ;I mild af~d gradual chun$ in both cryslnl and molecular struttore: a loss of center of inversion, probably involving the porriol rerurt~ of the molecule LO its non-plnnnr shnpc CD,