Preconcentration and Determination of a Phospholipid at a Surface Modified by Layer-by-Layer Assembly
Electrochemical oxidation of a phospholipid, phosphatidylcholine (PC), was accomplished at a 4‐aminothiophenol (ATP)‐modified gold electrode coated with a layer‐by‐layer assembly of an electrochemical catalyst (dirhodium phosphomolybdic acid), a trapping agent for PC (a cyclophane, CP, derivative, 1...
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| Veröffentlicht in: | Electroanalysis (New York, N.Y.) N.Y.), 2007-01, Vol.19 (1), p.49-54 |
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| container_title | Electroanalysis (New York, N.Y.) |
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| creator | Wandstrat, M. M. Cox, J. A. |
| description | Electrochemical oxidation of a phospholipid, phosphatidylcholine (PC), was accomplished at a 4‐aminothiophenol (ATP)‐modified gold electrode coated with a layer‐by‐layer assembly of an electrochemical catalyst (dirhodium phosphomolybdic acid), a trapping agent for PC (a cyclophane, CP, derivative, 1,4‐xylylene‐1,4‐phenylene‐diacetate), and a spacer (generation‐4 polyamidoamine dendrimer, PAMAM). The layer‐by‐layer assembly process and the trapping of PC was verified by quartz crystal microbalance measurements; Au|ATP|CP|PAMAM|CP trapped (1.5±0.4)×10−9 mol cm−2 of PC. The electrocatalytic oxidation of PC yielded a current that varied linearly with concentration over the range 1–50 μM; the R2 value was 0.996. |
| doi_str_mv | 10.1002/elan.200603684 |
| format | Article |
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M. ; Cox, J. A.</creator><creatorcontrib>Wandstrat, M. M. ; Cox, J. A.</creatorcontrib><description>Electrochemical oxidation of a phospholipid, phosphatidylcholine (PC), was accomplished at a 4‐aminothiophenol (ATP)‐modified gold electrode coated with a layer‐by‐layer assembly of an electrochemical catalyst (dirhodium phosphomolybdic acid), a trapping agent for PC (a cyclophane, CP, derivative, 1,4‐xylylene‐1,4‐phenylene‐diacetate), and a spacer (generation‐4 polyamidoamine dendrimer, PAMAM). The layer‐by‐layer assembly process and the trapping of PC was verified by quartz crystal microbalance measurements; Au|ATP|CP|PAMAM|CP trapped (1.5±0.4)×10−9 mol cm−2 of PC. 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A.</creatorcontrib><title>Preconcentration and Determination of a Phospholipid at a Surface Modified by Layer-by-Layer Assembly</title><title>Electroanalysis (New York, N.Y.)</title><addtitle>Electroanalysis</addtitle><description>Electrochemical oxidation of a phospholipid, phosphatidylcholine (PC), was accomplished at a 4‐aminothiophenol (ATP)‐modified gold electrode coated with a layer‐by‐layer assembly of an electrochemical catalyst (dirhodium phosphomolybdic acid), a trapping agent for PC (a cyclophane, CP, derivative, 1,4‐xylylene‐1,4‐phenylene‐diacetate), and a spacer (generation‐4 polyamidoamine dendrimer, PAMAM). The layer‐by‐layer assembly process and the trapping of PC was verified by quartz crystal microbalance measurements; Au|ATP|CP|PAMAM|CP trapped (1.5±0.4)×10−9 mol cm−2 of PC. The electrocatalytic oxidation of PC yielded a current that varied linearly with concentration over the range 1–50 μM; the R2 value was 0.996.</description><subject>Catalysis</subject><subject>Layer-by-layer assembly</subject><subject>Phospholipids</subject><subject>Voltammetry</subject><issn>1040-0397</issn><issn>1521-4109</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2007</creationdate><recordtype>article</recordtype><recordid>eNqFkE1LxDAQhosoqKtXzzl565o0H22Oi9-yrgsqHkOaTDDabdaki_bfW62IN0_zMrzPMDxZdkTwlGBcnECj22mBscBUVGwr2yO8IDkjWG4PGTOcYyrL3Ww_pReMsRRM7mWwjGBCa6Dtou58aJFuLTqDDuLKt-MmOKTR8jmk9XNo_NpbpLthc7-JThtAt8F658Giukdz3UPM6z7_DmiWEqzqpj_IdpxuEhz-zEn2eHH-cHqVz-8ur09n89xQXrGcWc6JKKGiHJg20moqiHElt0RiKLCVTtdQGycIk9rWmpOKGi4KSSl1gtFJdjzeXcfwtoHUqZVPBprBDIRNUnSwQ0tOhuJ0LJoYUorg1Dr6lY69Ilh92VRfNtWvzQGQI_DuG-j_aavz-Wzxl81H1qcOPn5ZHV-VKId31NPiUt0WvFrcVFeqoJ-uCYjf</recordid><startdate>200701</startdate><enddate>200701</enddate><creator>Wandstrat, M. 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The layer‐by‐layer assembly process and the trapping of PC was verified by quartz crystal microbalance measurements; Au|ATP|CP|PAMAM|CP trapped (1.5±0.4)×10−9 mol cm−2 of PC. The electrocatalytic oxidation of PC yielded a current that varied linearly with concentration over the range 1–50 μM; the R2 value was 0.996.</abstract><cop>Weinheim</cop><pub>WILEY-VCH Verlag</pub><doi>10.1002/elan.200603684</doi><tpages>6</tpages></addata></record> |
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| ispartof | Electroanalysis (New York, N.Y.), 2007-01, Vol.19 (1), p.49-54 |
| issn | 1040-0397 1521-4109 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_30063751 |
| source | Wiley Online Library Journals Frontfile Complete |
| subjects | Catalysis Layer-by-layer assembly Phospholipids Voltammetry |
| title | Preconcentration and Determination of a Phospholipid at a Surface Modified by Layer-by-Layer Assembly |
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