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SUMMARY:Beyond the Chemical Cemetery: in situ X-ray Characterisation of St
 ructural Changes in Solids - Anthony Phillips (Cavendish Laboratory)
DTSTART:20101108T160000Z
DTEND:20101108T170000Z
UID:TALK26587@talks.cam.ac.uk
CONTACT:Ian Farnan
DESCRIPTION:We often think of crystal structures as essentially rigid -- b
 ut in many cases parts of the structure have considerable freedom of movem
 ent\, and may even undergo outright chemical reaction\, within the crystal
  lattice. I will discuss two families of materials in which substantial at
 omic motion gives rise to unusual\, useful properties. First\, in framewor
 ks of d10 metals connected by cyanide bridges\, the motion of the cyanide 
 ligands gives rise to anomalous thermal expansion behaviour\; I show that 
 this can easily be tuned by altering the composition of the material. Seco
 nd\, ruthenium-sulfur dioxide complexes undergo photoinduced linkage isome
 rism\, which leads to properties potentially useful in holographic data st
 orage. I demonstrate the powerful influence of the local crystal structure
  over the structural changes observed.
LOCATION:Harker 2 lecture room\, Department of Earth Sciences\, Downing Si
 te
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