A comparison of sensitized Ln(III) emission using pyridine- and pyrazine-2,6-dicarboxylates
The synthesis, X-ray structure, solution stability, and photophysical properties of Eu(III) complexes with pyrazine-2,6-dicarboxylic acid (H(2)PYZ) are reported, and compared to structurally analogous complexes with pyridine-2,6-dicarboxylic acid (H(2)DPA). The [Eu(PYZ)(3)](3-) complex demonstrates...
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Veröffentlicht in: | Dalton transactions : an international journal of inorganic chemistry 2012-05, Vol.41 (17), p.5272-5279 |
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description | The synthesis, X-ray structure, solution stability, and photophysical properties of Eu(III) complexes with pyrazine-2,6-dicarboxylic acid (H(2)PYZ) are reported, and compared to structurally analogous complexes with pyridine-2,6-dicarboxylic acid (H(2)DPA). The [Eu(PYZ)(3)](3-) complex demonstrates highly efficient metal-centered Eu(III) luminescence in the solid state (Φ(total) ∼ 60.9%). In aqueous solution, moderate stability is retained at pH 7.4 (pEu ∼ 10.5), although hydrolysis of the complex anion becomes competitive below mM concentrations, and the observed luminescence intensity from the Eu(III) metal ion is reduced as a result. A complete evaluation of the thermodynamic solution stability has allowed the observed differences in the solution behaviour luminescence properties of these complexes to be rationalized. An analysis of their luminescence behaviour in the solid state has also allowed a direct comparison of the sensitisation behaviour for these isostructural compounds. |
doi_str_mv | 10.1039/c2dt30062a |
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The [Eu(PYZ)(3)](3-) complex demonstrates highly efficient metal-centered Eu(III) luminescence in the solid state (Φ(total) ∼ 60.9%). In aqueous solution, moderate stability is retained at pH 7.4 (pEu ∼ 10.5), although hydrolysis of the complex anion becomes competitive below mM concentrations, and the observed luminescence intensity from the Eu(III) metal ion is reduced as a result. A complete evaluation of the thermodynamic solution stability has allowed the observed differences in the solution behaviour luminescence properties of these complexes to be rationalized. An analysis of their luminescence behaviour in the solid state has also allowed a direct comparison of the sensitisation behaviour for these isostructural compounds.</description><identifier>ISSN: 1477-9226</identifier><identifier>EISSN: 1477-9234</identifier><identifier>DOI: 10.1039/c2dt30062a</identifier><identifier>PMID: 22411439</identifier><language>eng</language><publisher>England</publisher><subject>Aqueous solutions ; Carboxylic Acids - chemistry ; Emission ; Europium - chemistry ; Hydrogen-Ion Concentration ; Hydrolysis ; Luminescence ; Luminescent Measurements ; Models, Molecular ; Molecular Conformation ; Organometallic Compounds - chemical synthesis ; Organometallic Compounds - chemistry ; Pyrazines - chemistry ; Pyridines - chemistry ; Solid state ; Stability ; Synthesis ; Water - chemistry ; X-rays</subject><ispartof>Dalton transactions : an international journal of inorganic chemistry, 2012-05, Vol.41 (17), p.5272-5279</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c352t-31e37561c58726a12ec24194a0949941fc3be552ad2bd8fdc5fd2d0124f215183</citedby><cites>FETCH-LOGICAL-c352t-31e37561c58726a12ec24194a0949941fc3be552ad2bd8fdc5fd2d0124f215183</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/22411439$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Moore, Evan G</creatorcontrib><title>A comparison of sensitized Ln(III) emission using pyridine- and pyrazine-2,6-dicarboxylates</title><title>Dalton transactions : an international journal of inorganic chemistry</title><addtitle>Dalton Trans</addtitle><description>The synthesis, X-ray structure, solution stability, and photophysical properties of Eu(III) complexes with pyrazine-2,6-dicarboxylic acid (H(2)PYZ) are reported, and compared to structurally analogous complexes with pyridine-2,6-dicarboxylic acid (H(2)DPA). The [Eu(PYZ)(3)](3-) complex demonstrates highly efficient metal-centered Eu(III) luminescence in the solid state (Φ(total) ∼ 60.9%). In aqueous solution, moderate stability is retained at pH 7.4 (pEu ∼ 10.5), although hydrolysis of the complex anion becomes competitive below mM concentrations, and the observed luminescence intensity from the Eu(III) metal ion is reduced as a result. A complete evaluation of the thermodynamic solution stability has allowed the observed differences in the solution behaviour luminescence properties of these complexes to be rationalized. An analysis of their luminescence behaviour in the solid state has also allowed a direct comparison of the sensitisation behaviour for these isostructural compounds.</description><subject>Aqueous solutions</subject><subject>Carboxylic Acids - chemistry</subject><subject>Emission</subject><subject>Europium - chemistry</subject><subject>Hydrogen-Ion Concentration</subject><subject>Hydrolysis</subject><subject>Luminescence</subject><subject>Luminescent Measurements</subject><subject>Models, Molecular</subject><subject>Molecular Conformation</subject><subject>Organometallic Compounds - chemical synthesis</subject><subject>Organometallic Compounds - chemistry</subject><subject>Pyrazines - chemistry</subject><subject>Pyridines - chemistry</subject><subject>Solid state</subject><subject>Stability</subject><subject>Synthesis</subject><subject>Water - chemistry</subject><subject>X-rays</subject><issn>1477-9226</issn><issn>1477-9234</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqFkctOwzAQRS0EoqWw4QNQdhREwB4_Ei-rikekSmxgxSJybAcZ5UWcSLRfT6KWsoPVzGiO7lzNReic4FuCqbzTYDqKsQB1gKaERVEogbLDfQ9igk68_8AYAHM4RhMARgijcoreFoGuy0a1ztdVUOeBt5V3ndtYE6yqeZIkV4EtnfduWPfeVe9Bs26dcZUNA1WZcVKbcYIbERqnVZvVX-tCddafoqNcFd6e7eoMvT7cvyyfwtXzY7JcrEJNOXQhJZZGXBDN4wiEImD1YE8yhSWTkpFc08xyDspAZuLcaJ4bMJgAy4FwEtMZutzqNm392VvfpYNhbYtCVbbufSolxCBYJAdy_idJouGPMaOC_4-CEBGnMR7vX29R3dbetzZPm9aVql2nBKdjQulvQgN8sdPts9KaPfoTCf0GAj-J3w</recordid><startdate>20120507</startdate><enddate>20120507</enddate><creator>Moore, Evan G</creator><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7U5</scope><scope>8FD</scope><scope>L7M</scope><scope>7SR</scope><scope>8BQ</scope><scope>JG9</scope><scope>7X8</scope></search><sort><creationdate>20120507</creationdate><title>A comparison of sensitized Ln(III) emission using pyridine- and pyrazine-2,6-dicarboxylates</title><author>Moore, Evan G</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c352t-31e37561c58726a12ec24194a0949941fc3be552ad2bd8fdc5fd2d0124f215183</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2012</creationdate><topic>Aqueous solutions</topic><topic>Carboxylic Acids - chemistry</topic><topic>Emission</topic><topic>Europium - chemistry</topic><topic>Hydrogen-Ion Concentration</topic><topic>Hydrolysis</topic><topic>Luminescence</topic><topic>Luminescent Measurements</topic><topic>Models, Molecular</topic><topic>Molecular Conformation</topic><topic>Organometallic Compounds - chemical synthesis</topic><topic>Organometallic Compounds - chemistry</topic><topic>Pyrazines - chemistry</topic><topic>Pyridines - chemistry</topic><topic>Solid state</topic><topic>Stability</topic><topic>Synthesis</topic><topic>Water - chemistry</topic><topic>X-rays</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Moore, Evan G</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Engineered Materials Abstracts</collection><collection>METADEX</collection><collection>Materials Research Database</collection><collection>MEDLINE - Academic</collection><jtitle>Dalton transactions : an international journal of inorganic chemistry</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Moore, Evan G</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A comparison of sensitized Ln(III) emission using pyridine- and pyrazine-2,6-dicarboxylates</atitle><jtitle>Dalton transactions : an international journal of inorganic chemistry</jtitle><addtitle>Dalton Trans</addtitle><date>2012-05-07</date><risdate>2012</risdate><volume>41</volume><issue>17</issue><spage>5272</spage><epage>5279</epage><pages>5272-5279</pages><issn>1477-9226</issn><eissn>1477-9234</eissn><abstract>The synthesis, X-ray structure, solution stability, and photophysical properties of Eu(III) complexes with pyrazine-2,6-dicarboxylic acid (H(2)PYZ) are reported, and compared to structurally analogous complexes with pyridine-2,6-dicarboxylic acid (H(2)DPA). The [Eu(PYZ)(3)](3-) complex demonstrates highly efficient metal-centered Eu(III) luminescence in the solid state (Φ(total) ∼ 60.9%). In aqueous solution, moderate stability is retained at pH 7.4 (pEu ∼ 10.5), although hydrolysis of the complex anion becomes competitive below mM concentrations, and the observed luminescence intensity from the Eu(III) metal ion is reduced as a result. A complete evaluation of the thermodynamic solution stability has allowed the observed differences in the solution behaviour luminescence properties of these complexes to be rationalized. An analysis of their luminescence behaviour in the solid state has also allowed a direct comparison of the sensitisation behaviour for these isostructural compounds.</abstract><cop>England</cop><pmid>22411439</pmid><doi>10.1039/c2dt30062a</doi><tpages>8</tpages></addata></record> |
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subjects | Aqueous solutions Carboxylic Acids - chemistry Emission Europium - chemistry Hydrogen-Ion Concentration Hydrolysis Luminescence Luminescent Measurements Models, Molecular Molecular Conformation Organometallic Compounds - chemical synthesis Organometallic Compounds - chemistry Pyrazines - chemistry Pyridines - chemistry Solid state Stability Synthesis Water - chemistry X-rays |
title | A comparison of sensitized Ln(III) emission using pyridine- and pyrazine-2,6-dicarboxylates |
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