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DNA-MOF composites: Bespoke Biocompatible Materials
Secondary Supervisor(s): Prof James Tucker
University of Registration: University of Birmingham
BBSRC Research Themes:
Project Outline
We will demonstrate the ability to functionalise the surface of porous metal organic frameworks (MOFs) crystals with de novo designed ‘sticky end’ DNA. Employing the ‘sticky end’ approach, distinct MOF crystals with compatible DNA functionalisation will be joined to form tailored MOF-DNA composites, exploiting the tuneability of MOF porosity, conductivity and reactivity.
MOFs functionalised with DNA have been shown to form composites with nanoparticles [1] but the ability to use related approaches to build composite materials using two different MOFs, or between MOFs and other biocompatible materials have yet to be explored. Our initial investigations illustrate the potential of this approach proving the connection of DNA, tagged with fluorescent groups, to the surface of MOF crystals [2]. This project will study the assembly of DNA-MOFs with i) different compatible ‘sticky end’ DNA-MOFs; ii) DNA-MOF-polymer composites exploiting the interaction between DNA and polymers substrates [3].
The materials will be studied to establish whether DNA functionalisation affects MOF properties, and whether MOF composites retain the properties of the constituent MOFs or whether new emergent properties are observed. Applications in device fabrication for bioremediation, catalysis and sensing will be explored, particularly developing the stabilisation of MOFs by embedding them in a composite material.
This project is a collaboration between the Champness and Tucker research groups, combining expertise in advanced materials science (Champness) with DNA chemistry and design (Tucker). This powerful synergy will offer the student the opportunity to become expert in the broadest range of techniques and skills.
References:
[1] S. Wang et al, J. Am. Chem. Soc. 2019, 141, 2215.
[2] Tucker, Champness et al, unpublished results.
[3] C. J. Whitfield, et al, Chem. Rev., 2021, 121, 11030.