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Structural and electronic properties of an [(Al2O3)4]+ cluster

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Abstract

Density functional theory (DFT) has been applied to investigate the structural and electronic properties of an [(Al2O3)4]+ cluster. Since there is no structural data available from experiment, the geometry of the cluster was obtained based on a model which produced the best agreement with vibrational IR-MPD data. A range of different exchange-correlation functionals were tested, and it was concluded that the best spectral agreement was produced using the CAM-B3LYP and B3LYP functionals, respectively. To further characterize the properties of the cluster, natural bond order analysis was performed, and it was concluded that an appropriate description for the system is [Al8O12]+. The frontier orbitals and spin densities of both cation and neutral systems were considered, and it was concluded that the unrestricted singlet and triplet spin densities of the neutral [Al8O12] system were nearly degenerate, representing a di-radical, with the triplet state being lower in energy.

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Acknowledgments

We would like to acknowledge support from the Polish Ministry of Science and Higher Education within the statutory research number S-12/2015. Visiting professorship of Pawel M. Kozlowski at the Medical University of Gdansk was partially supported by the KNOW program. In addition, we would like to acknowledge the Cardinal Research Cluster (CRC) at the University of Louisville for ensuring computational resources.

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Correspondence to Pawel M. Kozlowski.

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Jaroszynska-Wolinska, J., Garabato, B.D., Alam, J. et al. Structural and electronic properties of an [(Al2O3)4]+ cluster. J Mol Model 21, 170 (2015). https://doi.org/10.1007/s00894-015-2711-4

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  • DOI: https://doi.org/10.1007/s00894-015-2711-4

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