Theoretical and experimental investigation of geometry and stability of small potassium‐iodide KnI(n=2–6) clusters
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2019
Authors
Milovanović, BranislavMilovanović, Milan
Veličković, Suzana

Veljković, Filip M.

Perić-Grujić, Aleksandra A.
Jerosimić, Stanka
Article (Published version)

© 2019 Wiley Periodicals, Inc.
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Small heterogeneous potassium-iodide clusters are investigated by means of ab initio electronic structural methods together with experimental production and detection in mass spectrometry. Experiments were done by using Knudsen cell mass spectrometry (KCMS) modification method, which provided simultaneous generating of all KnI0,+1 (n = 2–6) clusters at once. Clusters with more than two potassium atoms are produced for the first time. The lowest lying isomers of those KnI0,+1 (n = 2–6) clusters were found by using a random-kick procedure. The best description of growth of these clusters is the addition of one potassium atom to a smaller-neighbor cluster. Subsequently, stability of these species was examined. In spite of general trend of decreasing of binding energies, the closed-shell species have slightly larger stability with respect to the open-shell species. Alternation of dissociation energies between closed-shell and open-shell clusters is presented. Experimental setup also allows... determination of ionization energies of clusters: the obtained values are in the range of 3.46–3.98 eV, which classify these clusters as “superalkali.” For closed-shell clusters, the theoretical adiabatic ionization energies are close to experimental values, whereas in the case of open-shell clusters, the vertical ionization energies are those that are close to experimental values. © 2019 Wiley Periodicals, Inc.
Keywords:
potassium-iodide clusters / RCCSD[T] / superalkali / surface ionization mass spectrometerSource:
International Journal of Quantum Chemistry, 2019, 119, 22, e26009-Funding / projects:
- The structure and dynamics of molecular systems in ground and excited electronic states (RS-172040)
- Effects of laser radiation and plasma on novel materials in their synthesis, modification, and analysis (RS-172019)
DOI: 10.1002/qua.26009
ISSN: 0020-7608; 1097-461X
WoS: 000489581900007
Scopus: 2-s2.0-85068027257
URI
https://onlinelibrary.wiley.com/doi/abs/10.1002/qua.26009https://vinar.vin.bg.ac.rs/handle/123456789/8352
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VinčaTY - JOUR AU - Milovanović, Branislav AU - Milovanović, Milan AU - Veličković, Suzana AU - Veljković, Filip M. AU - Perić-Grujić, Aleksandra A. AU - Jerosimić, Stanka PY - 2019 UR - https://onlinelibrary.wiley.com/doi/abs/10.1002/qua.26009 UR - https://vinar.vin.bg.ac.rs/handle/123456789/8352 AB - Small heterogeneous potassium-iodide clusters are investigated by means of ab initio electronic structural methods together with experimental production and detection in mass spectrometry. Experiments were done by using Knudsen cell mass spectrometry (KCMS) modification method, which provided simultaneous generating of all KnI0,+1 (n = 2–6) clusters at once. Clusters with more than two potassium atoms are produced for the first time. The lowest lying isomers of those KnI0,+1 (n = 2–6) clusters were found by using a random-kick procedure. The best description of growth of these clusters is the addition of one potassium atom to a smaller-neighbor cluster. Subsequently, stability of these species was examined. In spite of general trend of decreasing of binding energies, the closed-shell species have slightly larger stability with respect to the open-shell species. Alternation of dissociation energies between closed-shell and open-shell clusters is presented. Experimental setup also allows determination of ionization energies of clusters: the obtained values are in the range of 3.46–3.98 eV, which classify these clusters as “superalkali.” For closed-shell clusters, the theoretical adiabatic ionization energies are close to experimental values, whereas in the case of open-shell clusters, the vertical ionization energies are those that are close to experimental values. © 2019 Wiley Periodicals, Inc. T2 - International Journal of Quantum Chemistry T1 - Theoretical and experimental investigation of geometry and stability of small potassium‐iodide KnI(n=2–6) clusters VL - 119 IS - 22 SP - e26009 DO - 10.1002/qua.26009 ER -
@article{ author = "Milovanović, Branislav and Milovanović, Milan and Veličković, Suzana and Veljković, Filip M. and Perić-Grujić, Aleksandra A. and Jerosimić, Stanka", year = "2019", abstract = "Small heterogeneous potassium-iodide clusters are investigated by means of ab initio electronic structural methods together with experimental production and detection in mass spectrometry. Experiments were done by using Knudsen cell mass spectrometry (KCMS) modification method, which provided simultaneous generating of all KnI0,+1 (n = 2–6) clusters at once. Clusters with more than two potassium atoms are produced for the first time. The lowest lying isomers of those KnI0,+1 (n = 2–6) clusters were found by using a random-kick procedure. The best description of growth of these clusters is the addition of one potassium atom to a smaller-neighbor cluster. Subsequently, stability of these species was examined. In spite of general trend of decreasing of binding energies, the closed-shell species have slightly larger stability with respect to the open-shell species. Alternation of dissociation energies between closed-shell and open-shell clusters is presented. Experimental setup also allows determination of ionization energies of clusters: the obtained values are in the range of 3.46–3.98 eV, which classify these clusters as “superalkali.” For closed-shell clusters, the theoretical adiabatic ionization energies are close to experimental values, whereas in the case of open-shell clusters, the vertical ionization energies are those that are close to experimental values. © 2019 Wiley Periodicals, Inc.", journal = "International Journal of Quantum Chemistry", title = "Theoretical and experimental investigation of geometry and stability of small potassium‐iodide KnI(n=2–6) clusters", volume = "119", number = "22", pages = "e26009", doi = "10.1002/qua.26009" }
Milovanović, B., Milovanović, M., Veličković, S., Veljković, F. M., Perić-Grujić, A. A.,& Jerosimić, S.. (2019). Theoretical and experimental investigation of geometry and stability of small potassium‐iodide KnI(n=2–6) clusters. in International Journal of Quantum Chemistry, 119(22), e26009. https://doi.org/10.1002/qua.26009
Milovanović B, Milovanović M, Veličković S, Veljković FM, Perić-Grujić AA, Jerosimić S. Theoretical and experimental investigation of geometry and stability of small potassium‐iodide KnI(n=2–6) clusters. in International Journal of Quantum Chemistry. 2019;119(22):e26009. doi:10.1002/qua.26009 .
Milovanović, Branislav, Milovanović, Milan, Veličković, Suzana, Veljković, Filip M., Perić-Grujić, Aleksandra A., Jerosimić, Stanka, "Theoretical and experimental investigation of geometry and stability of small potassium‐iodide KnI(n=2–6) clusters" in International Journal of Quantum Chemistry, 119, no. 22 (2019):e26009, https://doi.org/10.1002/qua.26009 . .