TY - JOUR
T1 - Low-energy configurations of Pt6Cu6 clusters and their physical-chemical characterization
T2 - a high-accuracy DFT study
AU - Mejía-López, J.
AU - Velásquez, E. A.
AU - Mazo-Zuluaga, J.
N1 - Funding Information:
We gratefully acknowledge support from: Financiamiento Basal para Centros Científicos y Tecnológicos de Excelencia AFB180001, Dirección de Investigación de la Vicerrectoría de Investigación de la Pontificia Universidad Católica de Chile-Concurso Puente 034/2020 (Chile); the ‘Dedicación Exclusiva’, ‘Estrategia de Sostenibilidad GES 2020-2021’ and CODI 2018-22410 grants at the Universidad de Antioquia (Colombia). E. A. V. and J. M.-Z. acknowledge the Colombian youth for their defense of a better country and their seek of a high-quality public education system, free of charge and open to everyone.
Publisher Copyright:
© 2022 The Royal Society of Chemistry.
PY - 2022
Y1 - 2022
N2 - Based on a combination of many-body potentials, an analysis of the inertia tensors and a Density Functional Theory framework, we use a method to harvest the lowest energy states of any set of cluster systems. Then, this methodology is applied to the Pt6Cu6 cluster case and the structural, chemical, electronic, anisotropy, magnetic and vibrational properties of the lowest energy isomers are studied. Unexpectedly, some tens of isomers with much lower energy than the precedent believed ground state [J. Chem. Phys., 131(4):044701] are found, which indicates the goodness of this methodology. Some of the isomers obtained present the point groups Cs, C2v according to Schoenflies notation, while others do not exhibit specific symmetry operations. The global chemical descriptors as the ionization potential, the electron affinity and the chemical hardness have oscillating behaviors with overall decreasing trends as the energy of the isomer grows up, indicating a higher rate of deactivation by sintering processes and a higher strength of the adsorption of small molecules on these systems. We present interesting results of the electronic, magnetic, anisotropy, vibrational and thermal properties of these clusters and discuss them; what can be useful information for future experiments and technical applications in varied fields as catalysis, spintronics, molecular magnetism or magnetic storage information.
AB - Based on a combination of many-body potentials, an analysis of the inertia tensors and a Density Functional Theory framework, we use a method to harvest the lowest energy states of any set of cluster systems. Then, this methodology is applied to the Pt6Cu6 cluster case and the structural, chemical, electronic, anisotropy, magnetic and vibrational properties of the lowest energy isomers are studied. Unexpectedly, some tens of isomers with much lower energy than the precedent believed ground state [J. Chem. Phys., 131(4):044701] are found, which indicates the goodness of this methodology. Some of the isomers obtained present the point groups Cs, C2v according to Schoenflies notation, while others do not exhibit specific symmetry operations. The global chemical descriptors as the ionization potential, the electron affinity and the chemical hardness have oscillating behaviors with overall decreasing trends as the energy of the isomer grows up, indicating a higher rate of deactivation by sintering processes and a higher strength of the adsorption of small molecules on these systems. We present interesting results of the electronic, magnetic, anisotropy, vibrational and thermal properties of these clusters and discuss them; what can be useful information for future experiments and technical applications in varied fields as catalysis, spintronics, molecular magnetism or magnetic storage information.
UR - http://www.scopus.com/inward/record.url?scp=85132872148&partnerID=8YFLogxK
U2 - 10.1039/d2cp01614a
DO - 10.1039/d2cp01614a
M3 - Artículo
AN - SCOPUS:85132872148
SN - 1463-9076
VL - 24
SP - 16011
EP - 16020
JO - Physical Chemistry Chemical Physics
JF - Physical Chemistry Chemical Physics
IS - 26
ER -