Formation, characterization and electrochemical properties of novel tetrasubstituted cobalt phthalocyanines bearing tetrahydropyran, furan and coumarin moieties

被引：11
|
作者：
Chohan, Sumayya [1 ]
Booysen, Irvin Noel [1 ]
Mambanda, Allen [1 ]
Akerman, Matthew Piers [1 ]
机构：
[1] Univ KwaZulu Natal, Sch Chem & Phys, Private Bag X01, ZA-3209 Pietermaritzburg, South Africa
来源：
INORGANICA CHIMICA ACTA | 2016年 / 447卷
关键词：
Metallophthalocyanine; Tetrahydropyran; Furan; Spectroelectrochemistry; Electrocatalysis; L-Cysteine; GLASSY-CARBON ELECTRODE; SELF-ASSEMBLED MONOLAYER; L-CYSTEINE; TETRASULFONATED PHTHALOCYANINE; ELECTROCATALYTIC OXIDATION; VOLTAMMETRIC DETERMINATION; ZINC PHTHALOCYANINES; ASCORBIC-ACID; NITRIC-OXIDE; METAL-FREE;
D O I：
10.1016/j.ica.2016.04.021
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
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. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：183 / 191
页数：9
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