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SUMMARY:Structural and dynamical studies of small molecules adsorbed in MO
 Fs.
DTSTART:20160310T160000
DTEND:20160310T170000
DTSTAMP:20260408T025929Z
UID:be070b65918c51ca813ec732ba9a4a160f25fc5d769ce5432be842de
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Craig M. Brown\, NIST\nBio: My interests in science cent
 er around the structure and dynamics of novel materials. I have published 
 in the arenas of fullerenes\, nanotubes\, inorganic polymers and various f
 orms of hydrogen related to storage\, taking data from numerous large-scal
 e facilities including ESRF\, PSI\, ISIS\, SNS\, LANL\, SNLS\, ILL and NCN
 R.\nThe hydrogen work has really been quite a productive aspect of the ove
 rall chemi/physi-sorption efforts. The goals have been stipulated by the D
 oE and for the case of physisorption the main stumbling blocks are the low
 -ish volumetric capacities and the need to use cryogenic temperatures. The
 re are a number of mechanisms we are pursuing to increase the operating te
 mperature\, from strong-binding (less than 'Kubas' though)\, engineered na
 nospaces\, spillover mechanisms\, and substitution of hetero-atoms in carb
 on frameworks. The porous frameworks lend themselves to many more applicat
 ions and uses\, however\, and here are a few highlights from our efforts.\
 nAdsorption of molecules in functionalized and high surface area microporo
 us materials is of technological importance in a multitude of areas rangin
 g from chemical separations to energy storage. Over the past several years
  we have focused our research efforts on understanding the properties of m
 etal-organic frameworks (MOFs)1 and zeolites2 for storage and separations 
 of industrially important small molecules such as hydrogen\, oxygen\, carb
 on dioxide\, noble gases\, and short chain organics.  Besides the geometr
 ical and porosity control in either class of materials\, the properties of
  metal-organic frameworks can be tuned to optimize electrostatic interacti
 ons by exposing open metal cation sites.  Here\, we discuss the different
  requirements for performing these experiments at X-ray compared to neutro
 n sources and reflect on the information potentially obtainable in both ca
 ses. The results illustrate the power\, and limitations\, of diffraction i
 n elucidating many of the governing characteristics of these material prop
 erties and the interactions with the guest molecules.
LOCATION:EPFL Valais Wallis/Zeuzier conference room
STATUS:CONFIRMED
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