VUV photochemistry and nuclear spin conversion of water and water-orthohydrogen complexes in parahydrogen crystals at 4 K
Samples of H 2 O, HDO, and D 2 O were isolated in solid parahydrogen ( p H 2 ) matrices and irradiated by vacuum ultraviolet (VUV) radiation at 147 nm. Fourier-Transform Infrared (FTIR) spectra showed a clear depletion of D 2 O and an enrichment of both HDO and H 2 O by 147 nm irradiation. These irr...
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| Veröffentlicht in: | Physical chemistry chemical physics : PCCP 2021-02, Vol.23 (7), p.494-416 |
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| creator | Tahsildaran F, Fatemeh S Moore, Brendan Bashiri, Termeh Otani, Hatsuki Djuricanin, Pavle Malekfar, Rasoul Farahbod, Amir Hossein Momose, Takamasa |
| description | Samples of H
2
O, HDO, and D
2
O were isolated in solid parahydrogen (
p
H
2
) matrices and irradiated by vacuum ultraviolet (VUV) radiation at 147 nm. Fourier-Transform Infrared (FTIR) spectra showed a clear depletion of D
2
O and an enrichment of both HDO and H
2
O by 147 nm irradiation. These irradiation-dependent changes are attributed to the production of OH and/or OD radicals through photodissociations of H
2
O, HDO, and D
2
O. The radicals subsequently react with the hydrogen matrix, leading to the observed enrichment of H
2
O. No trace of isolated OH or OD was detected in the FTIR spectra, indicating that the OH/OD radicals react with the surrounding matrix hydrogen molecules
via
quantum tunneling within our experimental timescale. The observed temporal changes in concentrations, especially the increase of HDO concentration during VUV irradiation, can be interpreted by a model with a rapid conversion from orthohydrogen (
o
H
2
) to
p
H
2
in water-
o
H
2
complexes upon VUV photodissociation, indicating either the acceleration of the nuclear spin conversion (NSC) of H
2
due to the magnetic moment of the intermediate OH/OD radical, or the preferential reaction of the OH/OD radical with a nearby
o
H
2
molecule over other
p
H
2
molecules. We have also identified and quantified an anomalously slow NSC of H
2
O and D
2
O complexed with
o
H
2
in solid
p
H
2
.
VUV irradiation of water in solid
p
H
2
yields OH radicals which subsequently react with surrounding H
2
rapidly
via
quantum tunneling. |
| doi_str_mv | 10.1039/d0cp04523c |
| format | Article |
| fullrecord | <record><control><sourceid>proquest_rsc_p</sourceid><recordid>TN_cdi_proquest_miscellaneous_2489601389</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>2489601389</sourcerecordid><originalsourceid>FETCH-LOGICAL-c374t-bb375b63142b45e970f98647f23a1b645cf222a8343ab99dc9a047fcd20922373</originalsourceid><addsrcrecordid>eNpd0c9LwzAUB_Agis7pxbsS8CJCNclL0-Yo8ycO9OC8ljRN3UbX1KRV-98btznBU154nzxe-CJ0RMkFJSAvC6IbwmMGegsNKBcQSZLy7U2diD207_2cEEJjCrtoDyBORcLFAPWvk1fcTG1r9dQsZr51PVZ1getOV0Y57JtZjbWtP4zzM1tjW-JP1Rq3RMsqsq6d2mlfOPtmfuyiqcyX8Tg8bJRTfx3X-1ZVHqsWc_x4gHbKcDOH63OIJrc3L6P7aPx09zC6GkcaEt5GeQ5JnAugnOU8NjIhpUwFT0oGiuaCx7pkjKkUOKhcykJLRUJXF4xIxiCBITpbzW2cfe-Mb7PwTW2qStXGdj5jPJWCUEhloKf_6Nx2rg7bBSWBECkoD-p8pbSz3jtTZo2bLZTrM0qyn0CyazJ6XgYyCvhkPbLLF6bY0N8EAjheAef1pvuXKHwDcWqQDw</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>2493009614</pqid></control><display><type>article</type><title>VUV photochemistry and nuclear spin conversion of water and water-orthohydrogen complexes in parahydrogen crystals at 4 K</title><source>Royal Society Of Chemistry Journals 2008-</source><source>Alma/SFX Local Collection</source><creator>Tahsildaran F, Fatemeh S ; Moore, Brendan ; Bashiri, Termeh ; Otani, Hatsuki ; Djuricanin, Pavle ; Malekfar, Rasoul ; Farahbod, Amir Hossein ; Momose, Takamasa</creator><creatorcontrib>Tahsildaran F, Fatemeh S ; Moore, Brendan ; Bashiri, Termeh ; Otani, Hatsuki ; Djuricanin, Pavle ; Malekfar, Rasoul ; Farahbod, Amir Hossein ; Momose, Takamasa</creatorcontrib><description>Samples of H
2
O, HDO, and D
2
O were isolated in solid parahydrogen (
p
H
2
) matrices and irradiated by vacuum ultraviolet (VUV) radiation at 147 nm. Fourier-Transform Infrared (FTIR) spectra showed a clear depletion of D
2
O and an enrichment of both HDO and H
2
O by 147 nm irradiation. These irradiation-dependent changes are attributed to the production of OH and/or OD radicals through photodissociations of H
2
O, HDO, and D
2
O. The radicals subsequently react with the hydrogen matrix, leading to the observed enrichment of H
2
O. No trace of isolated OH or OD was detected in the FTIR spectra, indicating that the OH/OD radicals react with the surrounding matrix hydrogen molecules
via
quantum tunneling within our experimental timescale. The observed temporal changes in concentrations, especially the increase of HDO concentration during VUV irradiation, can be interpreted by a model with a rapid conversion from orthohydrogen (
o
H
2
) to
p
H
2
in water-
o
H
2
complexes upon VUV photodissociation, indicating either the acceleration of the nuclear spin conversion (NSC) of H
2
due to the magnetic moment of the intermediate OH/OD radical, or the preferential reaction of the OH/OD radical with a nearby
o
H
2
molecule over other
p
H
2
molecules. We have also identified and quantified an anomalously slow NSC of H
2
O and D
2
O complexed with
o
H
2
in solid
p
H
2
.
VUV irradiation of water in solid
p
H
2
yields OH radicals which subsequently react with surrounding H
2
rapidly
via
quantum tunneling.</description><identifier>ISSN: 1463-9076</identifier><identifier>EISSN: 1463-9084</identifier><identifier>DOI: 10.1039/d0cp04523c</identifier><identifier>PMID: 33586746</identifier><language>eng</language><publisher>England: Royal Society of Chemistry</publisher><subject>Acceleration ; Conversion ; Depletion ; Fourier transforms ; Infrared spectra ; Infrared spectroscopy ; Irradiation ; Line spectra ; Magnetic moments ; Nuclear spin ; Photochemistry ; Photodissociation ; Quantum tunnelling ; Radicals ; Ultraviolet radiation</subject><ispartof>Physical chemistry chemical physics : PCCP, 2021-02, Vol.23 (7), p.494-416</ispartof><rights>Copyright Royal Society of Chemistry 2021</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c374t-bb375b63142b45e970f98647f23a1b645cf222a8343ab99dc9a047fcd20922373</citedby><cites>FETCH-LOGICAL-c374t-bb375b63142b45e970f98647f23a1b645cf222a8343ab99dc9a047fcd20922373</cites><orcidid>0000-0001-8976-1938 ; 0000-0001-5529-5983</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27923,27924</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/33586746$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Tahsildaran F, Fatemeh S</creatorcontrib><creatorcontrib>Moore, Brendan</creatorcontrib><creatorcontrib>Bashiri, Termeh</creatorcontrib><creatorcontrib>Otani, Hatsuki</creatorcontrib><creatorcontrib>Djuricanin, Pavle</creatorcontrib><creatorcontrib>Malekfar, Rasoul</creatorcontrib><creatorcontrib>Farahbod, Amir Hossein</creatorcontrib><creatorcontrib>Momose, Takamasa</creatorcontrib><title>VUV photochemistry and nuclear spin conversion of water and water-orthohydrogen complexes in parahydrogen crystals at 4 K</title><title>Physical chemistry chemical physics : PCCP</title><addtitle>Phys Chem Chem Phys</addtitle><description>Samples of H
2
O, HDO, and D
2
O were isolated in solid parahydrogen (
p
H
2
) matrices and irradiated by vacuum ultraviolet (VUV) radiation at 147 nm. Fourier-Transform Infrared (FTIR) spectra showed a clear depletion of D
2
O and an enrichment of both HDO and H
2
O by 147 nm irradiation. These irradiation-dependent changes are attributed to the production of OH and/or OD radicals through photodissociations of H
2
O, HDO, and D
2
O. The radicals subsequently react with the hydrogen matrix, leading to the observed enrichment of H
2
O. No trace of isolated OH or OD was detected in the FTIR spectra, indicating that the OH/OD radicals react with the surrounding matrix hydrogen molecules
via
quantum tunneling within our experimental timescale. The observed temporal changes in concentrations, especially the increase of HDO concentration during VUV irradiation, can be interpreted by a model with a rapid conversion from orthohydrogen (
o
H
2
) to
p
H
2
in water-
o
H
2
complexes upon VUV photodissociation, indicating either the acceleration of the nuclear spin conversion (NSC) of H
2
due to the magnetic moment of the intermediate OH/OD radical, or the preferential reaction of the OH/OD radical with a nearby
o
H
2
molecule over other
p
H
2
molecules. We have also identified and quantified an anomalously slow NSC of H
2
O and D
2
O complexed with
o
H
2
in solid
p
H
2
.
VUV irradiation of water in solid
p
H
2
yields OH radicals which subsequently react with surrounding H
2
rapidly
via
quantum tunneling.</description><subject>Acceleration</subject><subject>Conversion</subject><subject>Depletion</subject><subject>Fourier transforms</subject><subject>Infrared spectra</subject><subject>Infrared spectroscopy</subject><subject>Irradiation</subject><subject>Line spectra</subject><subject>Magnetic moments</subject><subject>Nuclear spin</subject><subject>Photochemistry</subject><subject>Photodissociation</subject><subject>Quantum tunnelling</subject><subject>Radicals</subject><subject>Ultraviolet radiation</subject><issn>1463-9076</issn><issn>1463-9084</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><recordid>eNpd0c9LwzAUB_Agis7pxbsS8CJCNclL0-Yo8ycO9OC8ljRN3UbX1KRV-98btznBU154nzxe-CJ0RMkFJSAvC6IbwmMGegsNKBcQSZLy7U2diD207_2cEEJjCrtoDyBORcLFAPWvk1fcTG1r9dQsZr51PVZ1getOV0Y57JtZjbWtP4zzM1tjW-JP1Rq3RMsqsq6d2mlfOPtmfuyiqcyX8Tg8bJRTfx3X-1ZVHqsWc_x4gHbKcDOH63OIJrc3L6P7aPx09zC6GkcaEt5GeQ5JnAugnOU8NjIhpUwFT0oGiuaCx7pkjKkUOKhcykJLRUJXF4xIxiCBITpbzW2cfe-Mb7PwTW2qStXGdj5jPJWCUEhloKf_6Nx2rg7bBSWBECkoD-p8pbSz3jtTZo2bLZTrM0qyn0CyazJ6XgYyCvhkPbLLF6bY0N8EAjheAef1pvuXKHwDcWqQDw</recordid><startdate>20210225</startdate><enddate>20210225</enddate><creator>Tahsildaran F, Fatemeh S</creator><creator>Moore, Brendan</creator><creator>Bashiri, Termeh</creator><creator>Otani, Hatsuki</creator><creator>Djuricanin, Pavle</creator><creator>Malekfar, Rasoul</creator><creator>Farahbod, Amir Hossein</creator><creator>Momose, Takamasa</creator><general>Royal Society of Chemistry</general><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><scope>L7M</scope><scope>7X8</scope><orcidid>https://orcid.org/0000-0001-8976-1938</orcidid><orcidid>https://orcid.org/0000-0001-5529-5983</orcidid></search><sort><creationdate>20210225</creationdate><title>VUV photochemistry and nuclear spin conversion of water and water-orthohydrogen complexes in parahydrogen crystals at 4 K</title><author>Tahsildaran F, Fatemeh S ; Moore, Brendan ; Bashiri, Termeh ; Otani, Hatsuki ; Djuricanin, Pavle ; Malekfar, Rasoul ; Farahbod, Amir Hossein ; Momose, Takamasa</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c374t-bb375b63142b45e970f98647f23a1b645cf222a8343ab99dc9a047fcd20922373</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2021</creationdate><topic>Acceleration</topic><topic>Conversion</topic><topic>Depletion</topic><topic>Fourier transforms</topic><topic>Infrared spectra</topic><topic>Infrared spectroscopy</topic><topic>Irradiation</topic><topic>Line spectra</topic><topic>Magnetic moments</topic><topic>Nuclear spin</topic><topic>Photochemistry</topic><topic>Photodissociation</topic><topic>Quantum tunnelling</topic><topic>Radicals</topic><topic>Ultraviolet radiation</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Tahsildaran F, Fatemeh S</creatorcontrib><creatorcontrib>Moore, Brendan</creatorcontrib><creatorcontrib>Bashiri, Termeh</creatorcontrib><creatorcontrib>Otani, Hatsuki</creatorcontrib><creatorcontrib>Djuricanin, Pavle</creatorcontrib><creatorcontrib>Malekfar, Rasoul</creatorcontrib><creatorcontrib>Farahbod, Amir Hossein</creatorcontrib><creatorcontrib>Momose, Takamasa</creatorcontrib><collection>PubMed</collection><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>MEDLINE - Academic</collection><jtitle>Physical chemistry chemical physics : PCCP</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Tahsildaran F, Fatemeh S</au><au>Moore, Brendan</au><au>Bashiri, Termeh</au><au>Otani, Hatsuki</au><au>Djuricanin, Pavle</au><au>Malekfar, Rasoul</au><au>Farahbod, Amir Hossein</au><au>Momose, Takamasa</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>VUV photochemistry and nuclear spin conversion of water and water-orthohydrogen complexes in parahydrogen crystals at 4 K</atitle><jtitle>Physical chemistry chemical physics : PCCP</jtitle><addtitle>Phys Chem Chem Phys</addtitle><date>2021-02-25</date><risdate>2021</risdate><volume>23</volume><issue>7</issue><spage>494</spage><epage>416</epage><pages>494-416</pages><issn>1463-9076</issn><eissn>1463-9084</eissn><abstract>Samples of H
2
O, HDO, and D
2
O were isolated in solid parahydrogen (
p
H
2
) matrices and irradiated by vacuum ultraviolet (VUV) radiation at 147 nm. Fourier-Transform Infrared (FTIR) spectra showed a clear depletion of D
2
O and an enrichment of both HDO and H
2
O by 147 nm irradiation. These irradiation-dependent changes are attributed to the production of OH and/or OD radicals through photodissociations of H
2
O, HDO, and D
2
O. The radicals subsequently react with the hydrogen matrix, leading to the observed enrichment of H
2
O. No trace of isolated OH or OD was detected in the FTIR spectra, indicating that the OH/OD radicals react with the surrounding matrix hydrogen molecules
via
quantum tunneling within our experimental timescale. The observed temporal changes in concentrations, especially the increase of HDO concentration during VUV irradiation, can be interpreted by a model with a rapid conversion from orthohydrogen (
o
H
2
) to
p
H
2
in water-
o
H
2
complexes upon VUV photodissociation, indicating either the acceleration of the nuclear spin conversion (NSC) of H
2
due to the magnetic moment of the intermediate OH/OD radical, or the preferential reaction of the OH/OD radical with a nearby
o
H
2
molecule over other
p
H
2
molecules. We have also identified and quantified an anomalously slow NSC of H
2
O and D
2
O complexed with
o
H
2
in solid
p
H
2
.
VUV irradiation of water in solid
p
H
2
yields OH radicals which subsequently react with surrounding H
2
rapidly
via
quantum tunneling.</abstract><cop>England</cop><pub>Royal Society of Chemistry</pub><pmid>33586746</pmid><doi>10.1039/d0cp04523c</doi><tpages>13</tpages><orcidid>https://orcid.org/0000-0001-8976-1938</orcidid><orcidid>https://orcid.org/0000-0001-5529-5983</orcidid></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 1463-9076 |
| ispartof | Physical chemistry chemical physics : PCCP, 2021-02, Vol.23 (7), p.494-416 |
| issn | 1463-9076 1463-9084 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_2489601389 |
| source | Royal Society Of Chemistry Journals 2008-; Alma/SFX Local Collection |
| subjects | Acceleration Conversion Depletion Fourier transforms Infrared spectra Infrared spectroscopy Irradiation Line spectra Magnetic moments Nuclear spin Photochemistry Photodissociation Quantum tunnelling Radicals Ultraviolet radiation |
| title | VUV photochemistry and nuclear spin conversion of water and water-orthohydrogen complexes in parahydrogen crystals at 4 K |
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