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Kolesnikov A, Krishnamoorthy A, Nomura KI, Wu Z, Abernathy DL, Huq A, Granroth GE, Christe KO, Haiges R, Kalia RK, Nakano A, Vashishta P. Inelastic Neutron Scattering Study of Phonon Density of States of Iodine Oxides and First-Principles Calculations. J Phys Chem Lett 2023; 14:10080-10087. [PMID: 37917420 PMCID: PMC10641886 DOI: 10.1021/acs.jpclett.3c02357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Revised: 10/24/2023] [Accepted: 10/25/2023] [Indexed: 11/04/2023]
Abstract
Iodine oxides I2Oy (y = 4, 5, 6) crystallize into atypical structures that fall between molecular- and framework-base types and exhibit high reactivity in an ambient environment, a property highly desired in the so-called "agent defeat materials". Inelastic neutron scattering experiments were performed to determine the phonon density of states of the newly synthesized I2O5 and I2O6 samples. First-principles calculations were carried out for I2O4, I2O5, and I2O6 to predict their thermodynamic properties and phonon density of states. Comparison of the INS data with the Raman and infrared measurements as well as the first-principles calculations sheds light on their distinctive, anisotropic thermomechanical properties.
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Affiliation(s)
- Alexander
I. Kolesnikov
- Neutron
Scattering Division, Oak Ridge National
Laboratory, Oak Ridge, Tennessee 37831-6473, United States
| | - Aravind Krishnamoorthy
- J.
Mike Walker ’66 Department of Mechanical Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Ken-ichi Nomura
- Collaboratory
for Advanced Computing and Simulations, Department of Chemical Engineering
& Materials Science, Department of Physics & Astronomy, and
Department of Computer Science, University
of Southern California, Los Angeles, California 90089-0242, United States
| | - Zhongqing Wu
- School
of Earth and Space Sciences, University
of Science and Technology of China, Hefei, Anhui 230026, China
| | - Douglas L. Abernathy
- Neutron
Scattering Division, Oak Ridge National
Laboratory, Oak Ridge, Tennessee 37831-6473, United States
| | - Ashfia Huq
- Sandia
National Laboratories, Livermore, California 94551, United States
| | - Garrett E. Granroth
- Neutron
Scattering Division, Oak Ridge National
Laboratory, Oak Ridge, Tennessee 37831-6473, United States
| | - Karl O. Christe
- Loker Research
Institute and Department of Chemistry, University
of Southern California, Los Angeles, California 90089-1661, United States
| | - Ralf Haiges
- Loker Research
Institute and Department of Chemistry, University
of Southern California, Los Angeles, California 90089-1661, United States
| | - Rajiv K. Kalia
- Collaboratory
for Advanced Computing and Simulations, Department of Chemical Engineering
& Materials Science, Department of Physics & Astronomy, and
Department of Computer Science, University
of Southern California, Los Angeles, California 90089-0242, United States
| | - Aiichiro Nakano
- Collaboratory
for Advanced Computing and Simulations, Department of Chemical Engineering
& Materials Science, Department of Physics & Astronomy, and
Department of Computer Science, University
of Southern California, Los Angeles, California 90089-0242, United States
| | - Priya Vashishta
- Collaboratory
for Advanced Computing and Simulations, Department of Chemical Engineering
& Materials Science, Department of Physics & Astronomy, and
Department of Computer Science, University
of Southern California, Los Angeles, California 90089-0242, United States
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