Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 2, Issue 7, Pages 2213-2220Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ta14199c
Keywords
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Funding
- 973 Program [2012CB821700]
- NSFC [21031002, 21202088, 51073079]
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With a flexible aromatic ligand, bis-(3,5-dicarboxy-phenyl)terephthalamide (H4L), two metal-organic frameworks, Cd(L)center dot(HDMA)(2)(DMF)(H2O)(3) (1) and Zn(L)center dot(HDMA)(2)(DMF)(H2O)(6) (2), were synthesized using a solvothermal method. Both 1 and 2 possess a 3D open framework. These two compounds exhibit strong photoluminescence in suspensions, and their luminescence could be efficiently and selectively quenched by a series of nitroaromatics. Thus, 1 and 2 could be used as excellent luminescent probes for nitroaromatic explosives. Additionally, 1 and 2 could also be utilized as the sensing platforms for DNA strands, which is attributed to their different affinities for single-and double-stranded DNAs. With this method, 0.05 nM of target DNA could be detected, and the selectivity could be down to a single nucleotide mismatch. This work shows the potential of MOFs for the sensing of versatile chemicals.
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