Finding of a Liquid-Liquid Phase Transition in the Nanopore Water Doped with Hydroxylamine of a Small Amount
Low-temperature properties of nanopore hydroxylamine (HA) aqueous solutions with HA mole-fractions (xHAs) below 0.35 were studied by adiabatic calorimetry. It was found that the heat-capacity maximum at 233 K in pure water changed quickly to a phase transition of the first order by doping HA only of...
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| Veröffentlicht in: | Journal of the Physical Society of Japan 2013-12, Vol.82 (12), p.1-1 |
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| creator | Nagoe, Atsushi Oguni, Masaharu |
| description | Low-temperature properties of nanopore hydroxylamine (HA) aqueous solutions with HA mole-fractions (xHAs) below 0.35 were studied by adiabatic calorimetry. It was found that the heat-capacity maximum at 233 K in pure water changed quickly to a phase transition of the first order by doping HA only of xHA=0.03 and that the maximum or transition temperature (Ttrs) increased with increasing the xHA. The HA molecule was interpreted as acting like an inseparable water-molecular dimer and as functioning to stabilize the low-temperature low-density water phase with a highly developed hydrogen-bond network. The Ttrs showed its peak at around xHA=0.12. This was interpreted to indicate that the HA addition of a large amount leads to a little different hydrogen-bond network from the one formed in pure water. |
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It was found that the heat-capacity maximum at 233 K in pure water changed quickly to a phase transition of the first order by doping HA only of xHA=0.03 and that the maximum or transition temperature (Ttrs) increased with increasing the xHA. The HA molecule was interpreted as acting like an inseparable water-molecular dimer and as functioning to stabilize the low-temperature low-density water phase with a highly developed hydrogen-bond network. The Ttrs showed its peak at around xHA=0.12. 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It was found that the heat-capacity maximum at 233 K in pure water changed quickly to a phase transition of the first order by doping HA only of xHA=0.03 and that the maximum or transition temperature (Ttrs) increased with increasing the xHA. The HA molecule was interpreted as acting like an inseparable water-molecular dimer and as functioning to stabilize the low-temperature low-density water phase with a highly developed hydrogen-bond network. The Ttrs showed its peak at around xHA=0.12. This was interpreted to indicate that the HA addition of a large amount leads to a little different hydrogen-bond network from the one formed in pure water.</description><subject>Aqueous solutions</subject><subject>Calorimetry</subject><subject>Dimers</subject><subject>Hydrogen bonds</subject><subject>Hydroxyapatite</subject><subject>Inorganic chemistry</subject><subject>Low temperature physics</subject><subject>Molecules</subject><subject>Nanostructure</subject><subject>Networks</subject><subject>Phase transformations</subject><subject>Temperature effects</subject><subject>Transition temperature</subject><issn>0031-9015</issn><issn>1347-4073</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2013</creationdate><recordtype>article</recordtype><recordid>eNpdkE1LAzEURYMoWKv_IeDGzUDeZD6SZanWCoMKFlyW18kbm5JJppMZtP_egbpydTfnHi73gs1AZmWSiVJespkQEhItIL9mNzEehEhzSLMZcyvrjfVfPDQceWWPozXJOfj7HiPxTY8-2sEGz63nw574K_rQhZ74Jw7U88fQkeHfdtjz9cn04efksLWezsqPFp3jizaMfrhlVw26SHd_OWeb1dNmuU6qt-eX5aJKugKKRDWiyQxpMEI3pkwLiTtlRKZqIEkpKDQAlGrYqVpJLXOBRQoEukbIsxzlnD2ctV0fjiPFYdvaWJNz6CmMcQul0OVUEcWE3v9DD2Hs_TRuC4UqIdd6-u8X3MBifQ</recordid><startdate>20131201</startdate><enddate>20131201</enddate><creator>Nagoe, Atsushi</creator><creator>Oguni, Masaharu</creator><general>The Physical Society of Japan</general><scope>7U5</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope></search><sort><creationdate>20131201</creationdate><title>Finding of a Liquid-Liquid Phase Transition in the Nanopore Water Doped with Hydroxylamine of a Small Amount</title><author>Nagoe, Atsushi ; Oguni, Masaharu</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-p616-8f0f4de91d09fd7263ab8d048c1e3e218ad11e291b8c839350a621e19ca1545a3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2013</creationdate><topic>Aqueous solutions</topic><topic>Calorimetry</topic><topic>Dimers</topic><topic>Hydrogen bonds</topic><topic>Hydroxyapatite</topic><topic>Inorganic chemistry</topic><topic>Low temperature physics</topic><topic>Molecules</topic><topic>Nanostructure</topic><topic>Networks</topic><topic>Phase transformations</topic><topic>Temperature effects</topic><topic>Transition temperature</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Nagoe, Atsushi</creatorcontrib><creatorcontrib>Oguni, Masaharu</creatorcontrib><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Journal of the Physical Society of Japan</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Nagoe, Atsushi</au><au>Oguni, Masaharu</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Finding of a Liquid-Liquid Phase Transition in the Nanopore Water Doped with Hydroxylamine of a Small Amount</atitle><jtitle>Journal of the Physical Society of Japan</jtitle><date>2013-12-01</date><risdate>2013</risdate><volume>82</volume><issue>12</issue><spage>1</spage><epage>1</epage><pages>1-1</pages><issn>0031-9015</issn><eissn>1347-4073</eissn><abstract>Low-temperature properties of nanopore hydroxylamine (HA) aqueous solutions with HA mole-fractions (xHAs) below 0.35 were studied by adiabatic calorimetry. It was found that the heat-capacity maximum at 233 K in pure water changed quickly to a phase transition of the first order by doping HA only of xHA=0.03 and that the maximum or transition temperature (Ttrs) increased with increasing the xHA. The HA molecule was interpreted as acting like an inseparable water-molecular dimer and as functioning to stabilize the low-temperature low-density water phase with a highly developed hydrogen-bond network. The Ttrs showed its peak at around xHA=0.12. This was interpreted to indicate that the HA addition of a large amount leads to a little different hydrogen-bond network from the one formed in pure water.</abstract><cop>Tokyo</cop><pub>The Physical Society of Japan</pub><tpages>1</tpages></addata></record> |
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| language | eng |
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| source | Alma/SFX Local Collection |
| subjects | Aqueous solutions Calorimetry Dimers Hydrogen bonds Hydroxyapatite Inorganic chemistry Low temperature physics Molecules Nanostructure Networks Phase transformations Temperature effects Transition temperature |
| title | Finding of a Liquid-Liquid Phase Transition in the Nanopore Water Doped with Hydroxylamine of a Small Amount |
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