BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Memento EPFL//
BEGIN:VEVENT
SUMMARY:Phase transitions and transformations in metal-organic framework m
 aterials
DTSTART:20160602T160000
DTEND:20160602T170000
DTSTAMP:20260412T123156Z
UID:278ddfdc0141d41b27700fbd3be632b7314a0f191f475b01b7334499
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Anthony K. Cheetham\, University of Cambridge\nBio: Prof
 . Cheetham was educated at St Catherine's College\, Oxford in 1965 to stud
 y chemistry\, and graduated with a first class BA in 1969. He started his 
 doctorate at Wadham College\, Oxford in the same year\, preparing a disser
 tation on 'The Structures of some Non-stoichiometric Compounds'\, which he
  completed in 1971.\nAfter receiving his doctorate he became a lecturer at
  Lincoln College\, Oxford. In 1974 he became the Lecturer in Chemical Crys
 tallography\, and in 1990 he became Reader in Organic Materials. He moved 
 to the United States a year later to take up a position as Professor of Ma
 terials and Chemistry at the University of California\, Santa Barbara\, mo
 ving back to the United Kingdom in 2007 to become Goldsmiths' Professor of
  Materials Science at University of Cambridge.\nHis area of research is th
 at of inorganic materials\, involving their synthesis\, characterization a
 nd application. He is working on the development of advanced methods for t
 he chemical and structural characterization of polycrystalline materials a
 nd the application of the techniques to the study of zeolite catalysts\, m
 olecular sieves and optical materials.\nOur current research on metal-orga
 nic frameworks (MOFs) focuses primarily on their physical properties\, inc
 luding their remarkable mechanical\, optical\, magnetic\, ferroelectric an
 d electronic behaviour. We have worked extensively on the amorphization of
  MOFs\, which can be induced thermally\, under pressure\, or by milling [1
 ]. In certain cases we have been able to form glassy MOFs by quenching of 
 the molten state [2].\nI shall discuss several cases of phase transitions 
 that depend heavily on framework flexibility. These include the transition
  from a porous to a dense framework at 160K in the Zeolitic Imidazolate Fr
 amework\, ZIF-4\, which is accompanied by a decrease in volume of ~23% [3]
 .\nA second example involves a reversible\, pressure-induced phase transit
 ion in a dense rare-earth formate\, which shows the breaking and making of
  bonds during a transition that is accompanied by a 10% change in volume [
 4]. In addition\, we shall explore chemical transformations that depend on
  flexibility. These include the topochemical dehalogenation of a copper tr
 ithiocyanurate framework that is accompanied by a change from an insulatin
 g crystalline phase to an amorphous semiconductor [5]\, an insulator to pr
 oton conductor transition that is driven by hydration [6]\, and an in situ
  study of the successive crystallization of MOFs with increasing stability
  [7].\nFinally\, a brief summary of some of our recent work on hybrid pero
 vskites will also be presented [8].\n1. T. D. Bennett and A. K. Cheetham\,
  Accounts of Chemical Research 47\, 1555 (2014)\n2. T. D. Bennett\, J. C. 
 Tan\, Y. Z. Yue\, C. Ducati\, N. Terrill\, H.H.M. Yeung\, Z. Zhou\, S. Hen
 ke\, A. K. Cheetham and G. N. Greaves\, Nature Comm. 6\, 8079 (2015)\n3. 
  M. T. Wharmby\, S. Henke\, T. D. Bennett\, Y. Yue\, C. Mellot-Draznieks\,
  and A. K. Cheetham\, Angew. Chem. Intl. Ed. 54\, 6447 (2015)\n4.  E. C. 
 Spencer\, M. S. R. N. Kiran\, Wei Li\, U. Ramamurty\, N. L. Ross and A. K.
  Cheetham\, Angew. Chem. Intl. Ed. 53\, 5583 (2014)\n5. S. Tominaka\, T. S
 uga\, T. D. Bennett and A. K. Cheetham\, Chem. Sci. 6\, 1465 (2015)\n6. S.
  Tominaka\, F. X. Coudert\, T. D. Dao\, T. Nagao and A. K. Cheetham\, J. A
 mer. Chem. Soc. 137\, 6428 (2015)\n7. H.H.M. Yeung\, Y. Wu\, S. Henke\, A.
  K. Cheetham\, D. O’Hare and R. I. Walton\, Angew. Chem. Intl. Ed. Eng. 
 55\, 2012 (2016)\n8.  S. Sun\, S. Tominaka\, J.-H. Lee\, S. F. Xie\, P. D
 . Bristowe and A. K. Cheetham\, APL Materials\, 4\, 031101 (2016)\; F.  W
 ei\, Z. Deng\, S. Sun\, F. Xie\, G. Kieslich\, D. M. Evans\, M. A. Carpent
 er\, P. D Bristowe and A. K. Cheetham\, Materials Horizons (to be publishe
 d 2016)
LOCATION:EPFL Valais Wallis/Zeuzier conference room
STATUS:CONFIRMED
END:VEVENT
END:VCALENDAR