Synergistic Assembly of Heavy Metal Clusters and Luminescent Organic Bridging Ligands in Metal-Organic Frameworks for Highly Efficient X-ray Scintillation

被引：237

作者：

Wang, Cheng ^{[1
]}

Volotskova, Olga ^{[2
]}

Lu, Kuangda ^{[1
]}

Ahmad, Moiz ^{[2
]}

Sun, Conroy ^{[2
]}

Xing, Lei ^{[2
]}

Lin, Wenbin ^{[1
]}

机构：

[1] Univ Chicago, Dept Chem, Chicago, IL 60637 USA

[2] Stanford Univ, Sch Med, Dept Radiat Oncol, Stanford, CA 94305 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2014年 / 136卷 / 17期

关键词：

NANOSCALE COORDINATION POLYMERS; COMPUTED-TOMOGRAPHY; CONTRAST AGENTS; WATER OXIDATION; ANTHRACENE; RADIATION; DESIGN; NANOPARTICLES; FLUORESCENCE; CRYSTALS;

D O I：

10.1021/ja500671h

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We have designed two metal organic frameworks (MOFs) to efficiently convert X-ray to visible-light luminescence. The MOFs are constructed from M-6(mu(3)-O)(4)(mu(3)-OH)(4)(carboxylate)(12) (M = Hf or Zr) secondary building units (SBUs) and anthracene-based dicarboxylate bridging ligands. The high atomic number of Zr and Hf in the SBUs serves as effective X-ray antenna by absorbing X-ray photons and converting them to fast electrons through the photoelectric effect. The generated electrons then excite multiple anthracene-based emitters in the MOF through inelastic scattering, leading to efficient generation of detectable photons in the visible spectrum. The MOF materials thus serve as efficient X-ray scintillators via synergistic X-ray absorption by the metal-cluster SBUs and optical emission by the bridging ligands.

引用

页码：6171 / 6174

页数：4

共 44 条

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