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

详细信息    查看全文

• 作者：Cheng Wang ; Olga Volotskova ; Kuangda Lu ; Moiz Ahmad ; Conroy Sun ; Lei Xing ; Wenbin Lin
• 刊名：Journal of the American Chemical Society
• 出版年：2014
• 出版时间：April 30, 2014
• 年：2014
• 卷：136
• 期：17
• 页码：6171-6174
• 全文大小：316K
• 年卷期：v.136,no.17(April 30, 2014)
• ISSN：1520-5126

文摘

We have designed two metal鈥搊rganic frameworks (MOFs) to efficiently convert X-ray to visible-light luminescence. The MOFs are constructed from M₆(渭₃-O)₄(渭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.