کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1307495 | 1499142 | 2016 | 9 صفحه PDF | دانلود رایگان |
• Isolation of novel tetrasubstituted CoPcs, viz. CoPc-thp (3) and CoPc-fur (4).
• Modification of glassy carbon electrodes (GCEs) using CoPcs via drop-dry method.
• Bare GCE and 4-GCE showed no peaks for l-cysteine oxidation.
• 3-GCE and (CoPc-cou, 5)-GCE showed electrocatalytic activities toward l-cysteine.
• Electrocatalytic rate constants are higher than previously reported studies.
Cobalt phthalocyanines (CoPcs) bearing peripherally tetrasubstituted tetrahydropyran (thp) or furan (fur) moieties were formed and spectroscopically characterized. Structural elucidations of 4-(tetrahydropyran-2-methoxy)phthalonitrile (1) and 4-(furan-2-methylthio)phthalonitrile (2) were confirmed via single crystal X-ray analysis. The redox properties of CoPc-thp (3) and CoPc-fur (4) were investigated via cyclic and squarewave voltammetry as well as UV–Vis spectroelectrochemistry. Glassy carbon electrodes (GCEs) modified with 3, 4 and a previously reported coumarin (cou) substituted CoPc (CoPc-cou, 5), were tested for their electrocatalytic activities toward l-cysteine. While the bare GCE and 4-GCE showed no peaks for l-cysteine oxidation in the 0.0–0.70 V potential window; 3-GCE and 5-GCE showed peaks at 0.42 V and 0.52 V, respectively. Kinetic parameters were determined by chronoamperometry studies. l-Cysteine oxidation using 3-GCE was found to proceed at a faster rate than 5-GCE.
Glassy carbon electrodes (GCEs) were modified with CoPcs containing tetrahydropyran (3), furan (4) or coumarin (5) moieties. The bare GCE and 4-GCE showed no peaks for l-cysteine oxidation in the 0.0–0.70 V potential window while 3-GCE and 5-GCE showed peaks at 0.42 V and 0.52 V, respectively.Figure optionsDownload as PowerPoint slide
Journal: Inorganica Chimica Acta - Volume 447, 1 June 2016, Pages 183–191