物理化学学报 >> 2001, Vol. 17 >> Issue (10): 898-903.doi: 10.3866/PKU.WHXB20011007

研究论文 上一篇    下一篇

高压下两种8-羟基喹啉络合物的发光行为和结构变化

卢雪芳;张海蓉;李嫕;刘景;杨国强   

  1. 中国科学院化学研究所 分子科学中心光化学实验室,北京 100080;中国科学院理化技术研究所,北京 100101;中国科学院高能物理研究所,北京 100039;中国科学院北京高压科学研究中心,北京 100080
  • 收稿日期:2001-04-05 修回日期:2001-05-28 发布日期:2001-10-15
  • 通讯作者: 杨国强 E-mail:gyang@ipc.ac.cn

Luminescence Properties and Crystal Structure of Two Metal 8-hydroxyquinoline Complexes at High Pressure

Lu Xue-Fang;Zhang Hai-Rong;Li Yi;Liu Jing;Yang Guo-Qiang   

  1. Laboratory of Photochemistry,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100080;Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing 100101;Beijing Synchrotron Radiation Facility,Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100039;Beijing Center for High Pressure Sciences,Chinese Academy of Sciences,Beijing 100080
  • Received:2001-04-05 Revised:2001-05-28 Published:2001-10-15
  • Contact: Yang Guo-Qiang E-mail:gyang@ipc.ac.cn

摘要: 测定了在高压条件下两种金属(钙和锌)的8羟基喹啉络合物的晶体粉末样品的发光行为和原位X光衍射光谱.结果表明,压力对其发光性质产生极大的影响.随着压力的增加,8羟基喹啉钙的发光强度在3 GPa以内时大大增加,随后发光强度快速下降,到7 GPa左右时几乎为零.而8羟基喹啉锌的发光强度随压力的增加而逐渐降低,到7 GPa左右时约为常压的10%.高压下的原位X光衍射结果表明,8羟基喹啉钙的晶体在3~4 GPa开始 发生非晶化相变,在7 GPa时该非晶化相变完成,样品的X光衍射完全消失.而8羟基喹啉锌在压力的作用下(至16 GPa)没有发生明显的相变.

关键词: 高压, 金属8-羟基喹啉络合物, 发光光谱, 晶体结构

Abstract: The fluorescence emission and Xray diffraction of two metal (Ca2+ and Zn2+) 8hydroxyquinoline complexes (Caq2 and Znq2) have been measured at high pressure. It has been found that pressure can influence the emission dramatically. With increase of pressure Caq2 gives increasing of its emission within 3 GPa and drops quickly when the pressure gets higher. At about 7 GPa it shows almost no emission at all. The emission of Znq2 decreases gradually with increase of the pressure. The emission intensity is about 10% of its original when the pressure gets 7 GPa. The result of in situ Xray diffraction of Caq2 indicates that at about 3~4 GPa it starts a phase transition to amorphous and this transition completes at 7 GPa. All of the diffraction peaks has disappeared at this pressure. Znq2,however,gives no significant phase transition up to 16 GPa according to its in situ Xray diffraction result at pressure.

Key words: High pressure, Metal 8-hydroxyquinoline complexes, Fluorescence emission, Crystal structure