{"id":6862,"date":"2020-06-12T16:55:00","date_gmt":"2020-06-12T13:55:00","guid":{"rendered":"https:\/\/en.buradabiliyorum.com\/scientists-report-heavy-ion-transfer-in-charged-vdw-cluster-for-the-first-time\/"},"modified":"2020-06-12T16:55:00","modified_gmt":"2020-06-12T13:55:00","slug":"scientists-report-heavy-ion-transfer-in-charged-vdw-cluster-for-the-first-time","status":"publish","type":"post","link":"https:\/\/buradabiliyorum.com\/en\/scientists-report-heavy-ion-transfer-in-charged-vdw-cluster-for-the-first-time\/","title":{"rendered":"#Scientists report heavy ion transfer in charged vdW cluster for the first time"},"content":{"rendered":"

“#Scientists report heavy ion transfer in charged vdW cluster for the first time<\/strong>”<\/p>\n

\n
\n
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\"Scientists<\/img>
\n The coincidence map shows the time of flights between the first and the second fragment ions arriving at the detector. Credit: IMP
\n <\/figcaption><\/figure>\n<\/div>\n<\/div>\n

Since the discovery of the double helix form of DNA and the hypothesis of DNA mutation induced by proton transfer more than 50 years ago, it has been recognized that proton transfer is crucial to many chemical and biological processes.<\/p>\n

\n <\/section>\n

As these processes are known to be relevant to biophysics and radiation therapy, a question arises whether a massive ion could be transferred in biochemical processes and lead to fragmentation. Specifically, in a complex bio-environment, does heavy ion transfer play a role?<\/p>\n

Published in Nature Communications <\/i>on June 12, a group of researchers addresses these questions with a study of a new channel involving heavy N <\/sup>ion transfer observed in a charged Van der Waals cluster.
\nThe study was conducted by a team of researchers from the Institute of Modern Physics (IMP) of the Chinese Academy of Science<\/a>s (CAS), the Institute of App<\/a>lied Physics and Computational Mathematics, and Centre de recherche sur les Ions, les MAt\u00e9riaux et la Photonique (CIMAP) in France.
\n“Small van der Waals systems can be employed as experimentally feasible model systems,” said Prof. Zhu Xiaolong of IMP, one of the first authors. Van der Waals (vdW) clusters are weakly bound atomic\/molecular systems. “They are common in nature and important for understanding microenvironmental chemical phenomena in biosystems.”
\nInteratomic Coulombic decay is a typical process that demonstrates the energy and charge transfer over a large distance between atomic components in a cluster and results in fragmentation, proving that forbidden channels for isolated atoms\/molecules may be opened due to the presence of neighboring atoms. Here, the energy and charge transfers are media<\/a>ted by virtual photon or Coulomb interaction.
\nIn hydrogen-bond clusters, the proton transfer process plays an important role as well. It involves mass and charge migration over large distances within the cluster and results in fragmentation of the latter. Nevertheless, in previous research, this kind of transfer process was limited to hydrogen-bond clusters.<\/p>\n

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\"Scientists<\/img>
\n Schematic diagram of heavy ion transfer process through tunneling. Credit: IMP
\n <\/figcaption><\/figure>\n<\/div>\n<\/div>\n

In the current work, the scientists used the neutral vdW cluster N2<\/sub> Ar as a target in collisions with 1 MeV Ne8 <\/sup> ions to produce the doubly charged cluster (N2<\/sub>Ar<\/i>)2 <\/sup>.<\/p>\n

Surprisingly, an exotic heavy N <\/sup> ion transfer channel (N2<\/sub> Ar)2 <\/sup>\u2192 N <\/sup> NAr <\/sup> was observed. It is the first time that such a heavy-ion transfer process in a vdW cluster has ever been reported and the consequent formation of NAr <\/sup><\/i> is a novel scenario.
\nAccording to the study, this channel originates from the dissociation of the parent doubly charged cluster N2<\/sub>2 <\/sup>Ar<\/i> generated by the “N2<\/sub>-site” two-electron loss process.
\nTheoretical calculations show that the polarization interactions between Ar and N2<\/sub>2 <\/sup><\/i> lead first to an isomerization process ofN2<\/sub>2 <\/sup>Ar<\/i> from its initial T-shape to a linear shape (N-N-Ar).
\nIn addition, the neighboring neutral Ar atom decreases the N2<\/sub><\/i>2 <\/i> <\/sup> barrier height and width, resulting in significantly shorter lifetimes for the metastable electronic state.
\nConsequently, the breakup of the covalent N <\/sup>-N <\/sup> bond, the tunneling out of the N <\/sup> ion from the N2<\/sub><\/i>2 <\/i> <\/sup> potential well, as well as the formation of the N-Ar <\/sup> bound system take place almost simultaneously. Then the Coulomb explosion starts between N<\/i> <\/i> <\/sup> and NAr<\/i> <\/i> <\/sup> ion pairs.
\n“This new mechanism might be general<\/a> for molecular dimer ions in the presence of a neighboring atom, and be of potential importance in understanding the microdynamics of biological systems,” said Prof. Ma Xinwen from IMP, one of the corresponding authors of this paper. “For example, it may help us understand the micromechanism of cancer therapy by heavy ion irradiation.”<\/p>\n

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More information:<\/strong>
\n XiaoLong Zhu et al. Heavy N ion transfer in doubly charged N2Ar van der Waals cluster, Nature Communications<\/i> (2020). DOI: 10.1038\/s41467-020-16749-w\n <\/div>\n

\n Citation<\/strong>:
\n Scientists report heavy ion transfer in charged vdW cluster for the first time (2020, June 12)
\n retrieved 12 June 2020
\n from https:\/\/phys.org\/news<\/a>\/2020-06-scientists-heavy-ion-vdw-cluster.html<\/p>\n

This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no
\n part may be reproduced without the written permission. The content is provided for information purposes only.<\/p><\/div>\n<\/p><\/div>\n

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“#Scientists report heavy ion transfer in charged vdW cluster for the first time” The coincidence map shows the time of flights between the first and the second fragment ions arriving at the detector. Credit: IMP Since the discovery of the double helix form of DNA and the hypothesis of DNA mutation induced by proton transfer…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[16],"tags":[11610,13810,13808,13809],"class_list":["post-6862","post","type-post","status-publish","format-standard","hentry","category-sciencee","tag-biochemistry-materials-science","tag-it-has-been-recognized-that-proton-transfer-is-crucial-to-many-chemical-and-biological-processes","tag-scientists-report-heavy-ion-transfer-in-charged-vdw-cluster-for-the-first-time","tag-since-the-discovery-of-the-double-helix-form-of-dna-and-the-hypothesis-of-dna-mutation-induced-by-proton-transfer-more-than-50-years-ago"],"_links":{"self":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/posts\/6862","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/comments?post=6862"}],"version-history":[{"count":0,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/posts\/6862\/revisions"}],"wp:attachment":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/media?parent=6862"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/categories?post=6862"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/tags?post=6862"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}