Structural and dynamical studies of small molecules adsorbed in MOFs.
Event details
| Date | 10.03.2016 |
| Hour | 16:00 › 17:00 |
| Speaker |
Prof. Craig M. Brown, NIST Bio: My interests in science center around the structure and dynamics of novel materials. I have published in the arenas of fullerenes, nanotubes, inorganic polymers and various forms of hydrogen related to storage, taking data from numerous large-scale facilities including ESRF, PSI, ISIS, SNS, LANL, SNLS, ILL and NCNR. The hydrogen work has really been quite a productive aspect of the overall chemi/physi-sorption efforts. The goals have been stipulated by the DoE and for the case of physisorption the main stumbling blocks are the low-ish volumetric capacities and the need to use cryogenic temperatures. There are a number of mechanisms we are pursuing to increase the operating temperature, from strong-binding (less than 'Kubas' though), engineered nanospaces, spillover mechanisms, and substitution of hetero-atoms in carbon frameworks. The porous frameworks lend themselves to many more applications and uses, however, and here are a few highlights from our efforts. |
| Location |
EPFL Valais Wallis/Zeuzier conference room
|
| Category | Conferences - Seminars |
Adsorption of molecules in functionalized and high surface area microporous materials is of technological importance in a multitude of areas ranging from chemical separations to energy storage. Over the past several years we have focused our research efforts on understanding the properties of metal-organic frameworks (MOFs)1 and zeolites2 for storage and separations of industrially important small molecules such as hydrogen, oxygen, carbon dioxide, noble gases, and short chain organics. Besides the geometrical and porosity control in either class of materials, the properties of metal-organic frameworks can be tuned to optimize electrostatic interactions by exposing open metal cation sites. Here, we discuss the different requirements for performing these experiments at X-ray compared to neutron sources and reflect on the information potentially obtainable in both cases. The results illustrate the power, and limitations, of diffraction in elucidating many of the governing characteristics of these material properties and the interactions with the guest molecules.
Practical information
- General public
- Free
Organizer
- Prof. Wendy Queen
Contact
- Constance Visser Witman