School Seminar: Prof. James Crowley; University of Otago
Wednesday, 18 May 11:00am – 12:00pm
This seminar will be delivered in Online Zoom Please email email@example.com 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. 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. 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). 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.
-  T. R. Cook, P. J. Stang, Chem. Rev. 2015, 115, 7001-7045.
-  a) M. Hardy, A. Lützen, Chem. Eur. J. 2020, 26, 13332-13346; b) J. Lewis, J. Crowley, ChemPlusChem 2020, 85, 815-827.
-  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.