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Iodization Threshol...
Iodization Threshold in Size-Dependent Reactions of Lead Clusters Pbn+ with Iodomethane
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Yang, Mengzhou (författare)
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Wu, Haiming (författare)
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Huang, Benben (författare)
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Luo, Zhixun (författare)
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- Hansen, Klavs, 1958 (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)
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(creator_code:org_t)
- 2020-02-24
- 2020
- Engelska.
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Ingår i: Journal of Physical Chemistry A. - : American Chemical Society (ACS). - 1089-5639 .- 1520-5215. ; 124:12, s. 2505-2512
- Relaterad länk:
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https://gup.ub.gu.se...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Utilizing a magnetron-sputtering (MagS) source in tandem with a multiple-ion laminar flow tube (MIFT) reactor and a customized triple quadrupole mass spectrometer (TQMS), we have prepared clean Pbn+ (n = 1−13) clusters and measured their reactivity with iodomethane under high carrier gas pressures. Strong size dependences are found for the reactivity of these cationic Pbn+ clusters with CH3I. For the Pbn+ with n ≤ 4, iodinated clusters PbnI+ were found to be the dominant products, in strong contrast to n > 4 where no such products were seen. Quantum chemical studies show that with an increasing number of Pb atoms, the Pb−Pb interatomic interactions become stronger compared with the Pb−I bonding in PbnI+ clusters. Furthermore, the reactions of Pb1−4+ with CH3I have fairly small transition state energy barriers, in contrast to those for Pbn>4 + clusters which have magnitudes that will prevent reactions under the ambient conditions.
Ämnesord
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
Nyckelord
- Lead clusters
- reactivity
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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