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Search Publications by: Craig Brown (Fed)

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Displaying 276 - 300 of 309

Site-Specific CO 2 Adsorption and Zero Thermal Expansion in an Anisotropic Pore Network

November 8, 2011
Author(s)
Wendy Queen, Craig M. Brown, David K. Britt, Matthew R. Hudson, Omar M. Yaghi
Detailed neutron powder diffraction (NPD) experiments were carried out on the bare and CO 2 adsorbed Mg-MOF 74. While low-temperature data revealed two CO 2 adsorption sites and multiple changes in the framework as a function of CO 2 loading, room

Selective Binding of O 2 over N 2 in Redox- Active Metal-Organic Framework with Open Iron(II) Coordination Sites

August 10, 2011
Author(s)
Eric D. Bloch, Leslie J. Murray, Wendy Queen, Sachin Chavan, Sergey N. Maximoff, Julian P. Bigi, Rajamani Krishna, Vanessa Peterson, Fernande Grandjean, Berend Smit, Silvia Bordiga, Craig Brown, Jeffrey R. Long
The air-free reaction of FeCl 2 and H 4dobdc (dobdc 4- = 2,5-dioxido-1,4- benzenedicarboxylate) in a mixture of DMF and methanol affords Fe 2(dobdc), a metal-organic framework isostructural to M 2(dobdc) (M = Mg 2+, Mn 2+, Co 2+, Ni 2+, Zn 2+). The

Redox-Promoting Protein Motions in Rubredoxin

May 24, 2011
Author(s)
Jose M. Borreguero, Junhong He, F. Meilleur, Kevin Weiss, Craig Brown, D. A. A. Myles, Kenneth W. Herwig, Pratul K. Agarwal
Abstract Proteins are dynamic objects, constantly undergoing conformational fluctuations, yet the linkage between internal protein motion and function is widely debated. This manuscript reports on the characterization of temperature-activated collective

Neutron Scattering and Spectroscopic Studies of Hydrogen Adsorption in Cr 3 (BTC) 2 - A Metal-Organic Framework with Exposed Cr 2+ Sites

April 1, 2011
Author(s)
Kenji Sumida, Jae-Hyuk Her, Mircea Dinca, Leslie J. Murray, Jennifer M. Schloss, Christopher J. Pierce, Benjamin A. Thompson, Stephen A. FitzGerald, Craig Brown, Jeffrey R. Long
Microporous metal-organic frameworks possessing exposed metal cation sites on the pore surface are of particular interest for high-density H 2 storage at ambient temperatures, owing to the potential for H 2 binding at the appropriate isosteric heat of

A reversible structural transition in MIL-53 with large temperature hysteresis

August 12, 2008
Author(s)
Yun Liu, Jae-Hyuk Her, Anne Dailly, A. Ramirez-Cuesta, Dan A. Neumann, Craig Brown
The metal-organic framework, MIL-53, can have a structural transition from an open-pored to a closed-pored structure by adsorbing different guest molecules. The aid of guest molecules is believed to be necessary to initiate this "breathing" effect. Using

Terahertz Spectroscopy of Short-Chain Polypeptides

July 1, 2003
Author(s)
M R. Kutteruf, Craig Brown, L K. Iwaki, M B. Campbell, Timothy M. Korter, Edwin J. Heilweil
Terahertz (THz) absorption and neutron vibrational spectra for solid-phase short-chain peptide sequences at 77 K and 298 K are reported. We demonstrate that a high degree of spectral and structural information exists for these systems in the 1 THz to 15