Wednesday, 18 May 11:00am – 12:00pm

This seminar will be delivered in Online Zoom Please email chemistry.researchsupport@sydney.edu.au for zoom link and password.

Speaker: Prof. James Crowley; University of Otago

Host: Dr Lauren Macreadie

Title: Heterometallic Low-symmetry Metallosupramolecular Cages: Self-assembly, Switching and Molecular Recognition

Abstract: Self-assembled metallosupramolecular architectures (MSAs) or metal-organic cages (MOCs), depending on whom you ask, are the smaller, more soluble cousins of Metal Organic Frameworks (MOFs). Like their MOF cousins MSAs/MOCs can be exploited for the molecular recognition of a wide range of guests including reactive molecules and intermediates, pollutants and drugs.^[1] For the most part MSAs/MOCs have tended to be high-symmetry and homometallic species. More recently there has been a drive to generate lower-symmetry and heterometallic MSAs/MOCs as parts of efforts to further enhance the properties of these systems.^[2] Here I will described some of the strategies we have developed for the synthesis of lower-symmetry heterometallic MSAs/MOCs featuring palladium(II) and platinum(II) ions (Figure 1).^[3]  Additionally, the molecular recognition and switching properties of the heterometallic Pd(II)/Pt(II) MSAs/MOCs will be discussed.

Figure 1: Cartoon representations of a) homometallic M₂L₄ cages systems (where M = Pd(II) or Pt(II)); b and c) related heterometallic PdPtL₄ systems.

References

• [1]          T. R. Cook, P. J. Stang, Chem. Rev. 2015, 115, 7001-7045.
• [2]          a) M. Hardy, A. Lützen, Chem. Eur. J. 2020, 26, 13332-13346; b) J. Lewis, J. Crowley, ChemPlusChem 2020, 85, 815-827.
• [3]          a) L. S. Lisboa, D. Preston, C. J. McAdam, L. J. Wright, C. G. Hartinger, J. D. Crowley, Angew Chem., Int. Ed. 2022, 61, e202201700; b) L. S. Lisboa, J. A. Findlay, L. J. Wright, C. G. Hartinger, J. D. Crowley, Angew. Chem., Int. Ed. 2020, 59, 11101 –11107; c) D. Preston, J. J. Sutton, K. C. Gordon, J. D. Crowley, Angew. Chem., Int. Ed. 2018, 57, 8659-8663.

Biography: James obtained his BSc (Hons) (1998) and MSc (2000) from Victoria University of Wellington and completed his PhD (2000–2005) at the University of Chicago under the direction of the incomparable Prof. Brice Bosnich, FRS. In 2005 he moved to Prof. David Leigh’s group at the University of Edinburgh, where he was awarded a British Ramsay Memorial Trust Fellowship (2006–2008), to carry out research on interlocked architectures and molecular machines. James started his independent career at the University of Otago in 2008 where he is now a Professor.