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高压拉曼光谱方法研究联苯分子费米共振
  • ISSN号：1000-3290
  • 期刊名称：物理学报
  • 时间：0
  • 页码：155-159
  • 分类：O561.1[理学—原子与分子物理;理学—物理]
  • 作者机构：[1]超硬材料国家重点实验室 物理学院 吉林大学,长春130012
  • 相关基金：国家自然科学基金（批准号：10974067）; 吉林省科技厅项目（批准号：20090534 20101508）; 吉林大学科学前沿与交叉学科创新项目（批准号：200903322）;吉林大学青年教师创新项目（批准号：201001007）;吉林大学研究生创新基金（批准号：20101055）资助的课题
  • 相关项目：类胡萝卜素分子结构有序对性能的影响
作者： 周密|李占龙|陆国会|李东飞|孙成林|高淑琴|里佐威|Zhou Mi Li Zhan-Long Lu Guo-Hui Li Dong-Fei Sun Ch|
关键词： 联苯, 费米共振, 高压, 拉曼光谱, biphenyl, Fermi resonance, high pressure, Raman spectroscopy
中文摘要：

测量了0—15GPa压强下联苯分子的拉曼光谱.结果表明,随压强增加,分子内和分子间π-π共轭和离域效应增强,谱线的绝对强度变大、蓝移.联苯分子的两费米共振谱线强度比Rf/a减少,频率差Δ增加,当压强为8GPa时,费米共振现象消失,利用Betran理论得出了固有频率差Δ0和耦合系数ω随压强的变化关系,通过高压下相变进行了解释,并探讨了高压下费米共振耦合变弱的机理.

英文摘要：

Raman spectra of biphenyl have been obtained under pressures up to 15 GPa.The results indicated that with the increase of pressure,the effect of inter-and intra-molecular π-πconjugation and delocation increases,accompanied by the intensity enhancement of the Raman bands,and blue shift of the frequency.The intensity ratio（Rf/a） of two Fermi resonance bands υ＇6 ＋ υ＇1 and υ＇8 decreases,and the frequency difference Δ increases with the pressure.The Fermi resonance phenomenon disappears when the pressure goos up to 8 GPa.Using J.F.Bertrans theory,we obtained the relationship of the inherent frequency difference Δ0 and coupling coefficient ω with pressure.This phenomenon was explained by high-pressure phase transition.The mechanism of high pressure induced Fermi resonance weakening was also discussed.

同期刊论文项目
类胡萝卜素分子结构有序对性能的影响
期刊论文 67
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期刊信息
  • 《物理学报》
  • 北大核心期刊（2011版）
  • 主管单位:中国科学院
  • 主办单位:中国物理学会 中国科学院物理研究所
  • 主编：欧阳钟灿
  • 地址：北京603信箱(中国科学院物理研究所)
  • 邮编：100190
  • 邮箱：apsoffice@iphy.ac.cn
  • 电话：010-82649026
  • 国际标准刊号：ISSN：1000-3290
  • 国内统一刊号：ISSN：11-1958/O4
  • 邮发代号:2-425
  • 获奖情况:
  • 1999年首届国家期刊奖,2000年中科院优秀期刊特等奖,2001年科技期刊最高方阵队双高期刊居中国期刊第12位
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  • 被引量:49876