Colloidal crystal engineering with metal–organic framework nanoparticles and DNA

Shunzhi Wang, Sarah S. Park, Cassandra T. Buru, Haixin Lin, Peng-Cheng Chen, Eric W. Roth, Omar K. Farha and Chad A. Mirkin ()
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Shunzhi Wang: Northwestern University
Sarah S. Park: Northwestern University
Cassandra T. Buru: Northwestern University
Haixin Lin: Northwestern University
Peng-Cheng Chen: International Institute for Nanotechnology
Eric W. Roth: International Institute for Nanotechnology
Omar K. Farha: Northwestern University
Chad A. Mirkin: Northwestern University

Nature Communications, 2020, vol. 11, issue 1, 1-8

Abstract: Abstract Colloidal crystal engineering with nucleic acid-modified nanoparticles is a powerful way for preparing 3D superlattices, which may be useful in many areas, including catalysis, sensing, and photonics. To date, the building blocks studied have been primarily based upon metals, metal oxides, chalcogenide semiconductors, and proteins. Here, we show that metal–organic framework nanoparticles (MOF NPs) densely functionalized with oligonucleotides can be programmed to crystallize into a diverse set of superlattices with well-defined crystal symmetries and compositions. Electron microscopy and small-angle X-ray scattering characterization confirm the formation of single-component MOF superlattices, binary MOF–Au single crystals, and two-dimensional MOF nanorod assemblies. Importantly, DNA-modified porphyrinic MOF nanorods (PCN-222) were assembled into 2D superlattices and found to be catalytically active for the photooxidation of 2-chloroethyl ethyl sulfide (CEES, a chemical warfare simulant of mustard gas). Taken together, these new materials and methods provide access to colloidal crystals that incorporate particles with the well-established designer properties of MOFs and, therefore, increase the scope of possibilities for colloidal crystal engineering with DNA.

Date: 2020
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DOI: 10.1038/s41467-020-16339-w

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