<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0370-3908</journal-id>
<journal-title><![CDATA[Revista de la Academia Colombiana de Ciencias Exactas, Físicas y Naturales]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. acad. colomb. cienc. exact. fis. nat.]]></abbrev-journal-title>
<issn>0370-3908</issn>
<publisher>
<publisher-name><![CDATA[Academia Colombiana de Ciencias Exactas, Físicas y Naturales]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0370-39082021000100272</article-id>
<article-id pub-id-type="doi">10.18257/raccefyn.1187</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Regiospecific synthesis and electrochemical study of two water-soluble C60 carboxylic derivatives]]></article-title>
<article-title xml:lang="es"><![CDATA[Síntesis regioespecífica y estudio electroquímico de dos derivados carboxílicos C60 solubles en agua]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Villada]]></surname>
<given-names><![CDATA[Juan D.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Duarte-Ruiz]]></surname>
<given-names><![CDATA[Álvaro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Chaur]]></surname>
<given-names><![CDATA[Manuel N.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad del Valle Departamento de Química ]]></institution>
<addr-line><![CDATA[Cali ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional de Colombia Departamento de Química ]]></institution>
<addr-line><![CDATA[Bogotá ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad del Valle  ]]></institution>
<addr-line><![CDATA[Cali ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2021</year>
</pub-date>
<volume>45</volume>
<numero>174</numero>
<fpage>272</fpage>
<lpage>285</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0370-39082021000100272&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0370-39082021000100272&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0370-39082021000100272&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract We report a new methodology for the synthesis of two highly symmetric equatorial malonate hexaadducts of C60 fullerene. The synthetic methodology is based on a series of protection and deprotection steps that allow the preparation of a fullerene [60] functionalized with six symmetrical positioned malonate addends without using complicated and expensive separation techniques (high-performance liquid chromatography, HPLC) or long reaction times. This methodology allowed us to prepare the carboxylic adducts 6 (equatorial octacarboxylic tetraadduct of C60) and 8 (equatorial dodecacarboxylic hexakisadduct of C60). As far as we know, compound 6 has not yet been reported. We also studied the electronic properties of the main compounds by UV-Vis spectroscopy and cyclic voltammetry (CV). The reported fullerene adducts exhibited several reversible reduction processes whose electron transfers are controlled by diffusion.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen En este trabajo reportamos una nueva metodología para la síntesis de hexaaductos ecuatoriales de malonato altamente simétricos de fullereno C . Esta metodología sintética se basa en una serie de reacciones de protección y desprotección que permiten la obtención de un fullereno [60] funcionalizado con seis grupos malonato simétricamente posicionados. lo que permitió reducir los tiempos de síntesis y evitó el uso de métodos de separación costosos y complejos, como es el caso de la cromatografía líquida de alta eficiencia (high-performance liquid chromatography, HPLC). Mediante esta metodología se obtuvieron los aductos carboxílicos de fullereno 6 (tetraducto ecuatorial octacarboxílico de C60), del cual no se encontró reporte en la literatura, y 8 (aducto hexakis ecuatorial dodecacarboxílico de C60). Además del trabajo sintético, las propiedades electrónicas de los compuestos principales fueron caracterizadas por UV-Vis y estudios de voltamperometría cíclica. Los aductos de fullereno reportados muestran varios procesos redox reversibles cuyas transferencias electrónicas son controladas por difusión.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Fullerenes]]></kwd>
<kwd lng="en"><![CDATA[Symmetric adducts]]></kwd>
<kwd lng="en"><![CDATA[Bingel reaction]]></kwd>
<kwd lng="en"><![CDATA[Cyclic voltammetry]]></kwd>
<kwd lng="es"><![CDATA[Fullerenos]]></kwd>
<kwd lng="es"><![CDATA[Aductos simétricos]]></kwd>
<kwd lng="es"><![CDATA[Reacción de Bingel]]></kwd>
<kwd lng="es"><![CDATA[Voltamperometría cíclica]]></kwd>
</kwd-group>
</article-meta>
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