期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 20, 期 46, 页码 14965-14970出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201405194
关键词
crystal structures; fluorescence sensing; functionalization; metal sensing; metal-organic frameworks
资金
- DoE Office of Nuclear Energy's Nuclear Energy University Program [120427, 3151]
- National Science Foundation - Earth Sciences [EAR-1128799]
- Department of Energy (DOE)- GeoSciences [DE-FG02-94ER14466]
- Division of Chemistry (CHE)
- Division of Materials Research (DMR)
- National Science Foundation [NSF/CHE-1346572]
- U.S. DOE [DE-AC02-06CH11357]
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [1346572] Funding Source: National Science Foundation
Two metal-organic frameworks (MOFs) with Zr-oxo secondary building units (SBUs) were prepared by using p,p-terphenyldicarboxylate (TPDC) bridging ligands pre-functionalized with orthogonal succinic acid (MOF-1) and maleic acid groups (MOF-2). Single-crystal X-ray structure analysis of MOF-1 provides the first direct evidence for eight-connected SBUs in UiO-type MOFs. In contrast, MOF-2 contains twelve-connected SBUs as seen in the traditional UiO MOF topology. These structural assignments were confirmed by extended X-ray absorption fine structure (EXAFS) analysis. The highly porous MOF-1 is an excellent fluorescence sensor for metal ions with the detection limit of <0.5 ppb for Mn(2+)and three to four orders of magnitude greater sensitivity for metal ions than previously reported luminescent MOFs.
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