Basicity and stability of urea deep eutectic mixtures
The stability and basicity origin of some common urea based deep eutectic mixtures/solvents (DES) were studied. We have observed an unexpected Hantzsch dihydropyridine reaction in sorbitol/urea DES, where the source of ammonia was found not to be originated from the individual ingredients of the DES...
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| Veröffentlicht in: | RSC advances 2016-01, Vol.6 (7), p.5485-549 |
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| creator | Simeonov, S. P Afonso, Carlos A. M |
| description | The stability and basicity origin of some common urea based deep eutectic mixtures/solvents (DES) were studied. We have observed an unexpected Hantzsch dihydropyridine reaction in sorbitol/urea DES, where the source of ammonia was found not to be originated from the individual ingredients of the DES. Our results showed that decomposition of urea occurs in DES at lower than expected temperatures, namely below 100 °C and is enhanced in diol DES by the formation of carbonates causing their unexplained basicity. Carbohydrates and choline chloride (ChCl) DES exhibit lower rates of decomposition, while no decomposition was observed from neat urea or MeOH and EtOH urea solutions.
Some decomposition occurs below 100 °C for urea based deep eutectic mixtures/solvents (DES) liberating ammonia and is enhanced for diols by formation of carbonates. |
| doi_str_mv | 10.1039/c5ra24558c |
| format | Article |
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Some decomposition occurs below 100 °C for urea based deep eutectic mixtures/solvents (DES) liberating ammonia and is enhanced for diols by formation of carbonates.</description><identifier>ISSN: 2046-2069</identifier><identifier>EISSN: 2046-2069</identifier><identifier>DOI: 10.1039/c5ra24558c</identifier><language>eng</language><subject>Basicity ; Decomposition ; Diols ; Eutectics ; Sorbitol ; Stability ; Ureas</subject><ispartof>RSC advances, 2016-01, Vol.6 (7), p.5485-549</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c286t-c8e0b58ccb99f963e2dfadc205f2dacb57a3b978089905ad344a777284f3e19b3</citedby><cites>FETCH-LOGICAL-c286t-c8e0b58ccb99f963e2dfadc205f2dacb57a3b978089905ad344a777284f3e19b3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids></links><search><creatorcontrib>Simeonov, S. P</creatorcontrib><creatorcontrib>Afonso, Carlos A. M</creatorcontrib><title>Basicity and stability of urea deep eutectic mixtures</title><title>RSC advances</title><description>The stability and basicity origin of some common urea based deep eutectic mixtures/solvents (DES) were studied. We have observed an unexpected Hantzsch dihydropyridine reaction in sorbitol/urea DES, where the source of ammonia was found not to be originated from the individual ingredients of the DES. Our results showed that decomposition of urea occurs in DES at lower than expected temperatures, namely below 100 °C and is enhanced in diol DES by the formation of carbonates causing their unexplained basicity. Carbohydrates and choline chloride (ChCl) DES exhibit lower rates of decomposition, while no decomposition was observed from neat urea or MeOH and EtOH urea solutions.
Some decomposition occurs below 100 °C for urea based deep eutectic mixtures/solvents (DES) liberating ammonia and is enhanced for diols by formation of carbonates.</description><subject>Basicity</subject><subject>Decomposition</subject><subject>Diols</subject><subject>Eutectics</subject><subject>Sorbitol</subject><subject>Stability</subject><subject>Ureas</subject><issn>2046-2069</issn><issn>2046-2069</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><recordid>eNpNkE1LxDAQhoMouKx78S70KEI1H02aHNfiFywIoucyTScQabc1ScH993ZdUecy8w4Pw_AQcs7oNaPC3FgZgBdSantEFpwWKudUmeN_8ylZxfhO51KSccUWRN5C9NanXQbbNosJGt_t0-CyKSBkLeKY4ZTQJm-z3n-meR3PyImDLuLqpy_J2_3da_WYb54fnqr1Jrdcq5RbjbSZ37GNMc4ogbx10FpOpeMt2EaWIBpTaqqNoRJaURRQliXXhRPITCOW5PJwdwzDx4Qx1b2PFrsOtjhMsWZaSKU4M2xGrw6oDUOMAV09Bt9D2NWM1ns9dSVf1t96qhm-OMAh2l_uT5_4Ap5uYPA</recordid><startdate>20160101</startdate><enddate>20160101</enddate><creator>Simeonov, S. P</creator><creator>Afonso, Carlos A. M</creator><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>20160101</creationdate><title>Basicity and stability of urea deep eutectic mixtures</title><author>Simeonov, S. P ; Afonso, Carlos A. M</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c286t-c8e0b58ccb99f963e2dfadc205f2dacb57a3b978089905ad344a777284f3e19b3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2016</creationdate><topic>Basicity</topic><topic>Decomposition</topic><topic>Diols</topic><topic>Eutectics</topic><topic>Sorbitol</topic><topic>Stability</topic><topic>Ureas</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Simeonov, S. P</creatorcontrib><creatorcontrib>Afonso, Carlos A. M</creatorcontrib><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>RSC advances</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Simeonov, S. P</au><au>Afonso, Carlos A. M</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Basicity and stability of urea deep eutectic mixtures</atitle><jtitle>RSC advances</jtitle><date>2016-01-01</date><risdate>2016</risdate><volume>6</volume><issue>7</issue><spage>5485</spage><epage>549</epage><pages>5485-549</pages><issn>2046-2069</issn><eissn>2046-2069</eissn><abstract>The stability and basicity origin of some common urea based deep eutectic mixtures/solvents (DES) were studied. We have observed an unexpected Hantzsch dihydropyridine reaction in sorbitol/urea DES, where the source of ammonia was found not to be originated from the individual ingredients of the DES. Our results showed that decomposition of urea occurs in DES at lower than expected temperatures, namely below 100 °C and is enhanced in diol DES by the formation of carbonates causing their unexplained basicity. Carbohydrates and choline chloride (ChCl) DES exhibit lower rates of decomposition, while no decomposition was observed from neat urea or MeOH and EtOH urea solutions.
Some decomposition occurs below 100 °C for urea based deep eutectic mixtures/solvents (DES) liberating ammonia and is enhanced for diols by formation of carbonates.</abstract><doi>10.1039/c5ra24558c</doi><tpages>6</tpages></addata></record> |
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| source | Royal Society Of Chemistry Journals 2008- |
| subjects | Basicity Decomposition Diols Eutectics Sorbitol Stability Ureas |
| title | Basicity and stability of urea deep eutectic mixtures |
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