TEMPO-functionalized zinc phthalocyanine: synthesis, magnetic properties, and its utility for electrochemical sensing of ascorbic acid

被引：23

作者：

Korkut, Sibel Eken ^{[1
]}

Akyuz, Duygu ^{[2
]}

Ozdogan, Kemal ^{[3
]}

Yerli, Yusuf ^{[3
,4
]}

Koca, Atif ^{[2
]}

Sener, M. Kasim ^{[1
]}

机构：

[1] Yildiz Tekn Univ, Dept Chem, TR-34210 Istanbul, Turkey

[2] Marmara Univ, Dept Chem Engn, TR-34722 Istanbul, Turkey

[3] Yildiz Tekn Univ, Dept Phys, TR-34210 Istanbul, Turkey

[4] Gebze Tech Univ, Dept Phys, TR-41400 Gebze, Kocaeli, Turkey

来源：

DALTON TRANSACTIONS | 2016年 / 45卷 / 07期

关键词：

CARBON NANOTUBES; ELECTRODES; OXIDATION; RADICALS; SPECTROELECTROCHEMISTRY; NANOPARTICLES; COMPLEXES; SENSORS;

D O I：

10.1039/c5dt04513d

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Zinc(II) phthalocyanine (TEMPO-ZnPc), peripherally functionalized with 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO) radicals is synthesized and its magneto structural and electrochemical behaviors are investigated. TEMPO-ZnPc shows multi-electron ring based reduction reactions and a TEMPO based oxidation reaction. Spectroelectrochemical measurements support these peak assignments. TEMPO-ZnPc is tested as a homogeneous and heterogeneous ascorbic acid (AA) sensor. Disappearance of TEMPO-ZnPc based reduction processes and the observation of new waves at around 0 and 1.20 V with respect to increasing AA concentration indicate the interaction of TEMPO-ZnPc with AA and usability of the complex as an electrochemical AA sensor. For practical usage as heterogeneous electrocatalysts for AA sensing, a glassy carbon electrode (GCE) is coated with TEMPO-ZnPc (GCE/TEMPO-ZnPc) and this modified electrode is tested as a heterogeneous AA sensor. The redox peak of GCE/TEMPO-ZnPc at 0.81 V decreases the peak current while a new wave is observed at 0.65 V during the titration of the electrolyte with AA. GCE/TEMPO-ZnPc sense AA with 1.75 x 10(-6) mol dm(-3) LOD with a sensitivity of 1.89 x 10(3) A cm mol(-1).

引用

页码：3086 / 3092

页数：7

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