• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Chemistry: A European journal >Unraveling the Crystal Structure of Lanthanide–Murexide Complexes: Use of an Ancient Complexometry Indicator as a Near-Infrared-Emitting Single-Ion Magnet
【24h】

Unraveling the Crystal Structure of Lanthanide–Murexide Complexes: Use of an Ancient Complexometry Indicator as a Near-Infrared-Emitting Single-Ion Magnet

机译：揭示镧系元素-莫赛德配合物的晶体结构：使用古代复杂度指示剂作为近红外发射单离子磁体

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Herein, we provide some structural evidence of the complexation color-change of murexide solutions in presence of lanthanide, which has been used for decades in complexometric studies. For Ln=Sm to Lu and Y, the compounds crystallize as monomeric [Ln(Murex)_3]?11H_2O with an N3O6 tricapped square-antiprism environment, which are stable up to 250 ℃. Single-ion magnet (SIM) behavior is then observed on the Yb~(III) derivative in an original nine-coordinated environment. In-field slow relaxation (△=(15.6±1) K; τ_0=2.73×10~(-6) s) is observed with a very narrow distribution of the relaxation time (a_(max)=0.09). Magnetic and photophysical properties can be correlated. On one hand the analysis of NIR emission spectrum permits to have access to crystal field parameters and to compare them with those extracted from dc measurements. On the other hand, magnetic measurements permit to identify the nature of the MJ states involved in the ~2F_(5/2)→~2F_(7/2) luminescence spectrum. The gap between the low-lying states is in agreement with the energy barrier obtained from magnetic slow-relaxation measurement.
机译：在此，我们提供了在镧系元素存在下氨苯蝶呤溶液的络合颜色变化的一些结构性证据，该化合物在络合计量研究中已经使用了数十年。当Ln = Sm表示Lu和Y时，在N3O6限制的方形反棱镜环境下，该化合物结晶为单体[Ln（Murex）_3]？11H_2O，在250℃以下稳定。然后在原始的九配位环境中，在Yb〜（III）衍生物上观察到单离子磁体（SIM）行为。观察到场内缓慢弛豫（△=（15.6±1）K;τ_0= 2.73×10〜（-6）s），弛豫时间分布很窄（a_（max）= 0.09）。磁性和光物理性质可以相关。一方面，近红外发射光谱的分析允许访问晶体场参数，并将其与从直流测量中提取的参数进行比较。另一方面，磁测量允许识别〜2F_（5/2）→〜2F_（7/2）发光光谱中涉及的MJ状态的性质。低洼状态之间的间隙与通过磁慢弛豫测量获得的能垒一致。

著录项

相似文献

  • 外文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号