Synthesis and electrochemical and in situ spectroelectrochemical characterization of manganese, vanadyl, and cobalt phthalocyanines with 2-naphthoxy substituents

Özçeşmeci, İbrahim; Koca, Atıf; Gül, Ahmet

doi:10.1016/j.electacta.2011.03.069

Cited by 39 publications

(12 citation statements)

References 47 publications

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“…The cyclic and square wave voltammetries of the purple complex (that became green on reduction) showed five redox couples, but also in this case the spectroelectrochemical data indicated only ring based processes. VO-phthalocyanine, bearing peripheral 2-naphthoxy groups, was synthesized by cyclotetramerization of the corresponding phthalonitrile derivative [69]. CV in DMSO and in DCM, with Bu 4 NClO 4 as supporting electrolyte, presented several redox waves, all related to ligand oxidations and reductions, differently from what found with Co and Mn complexes with the same ligand.…”

Section: Complexes With Tetradentate Ligandsmentioning

confidence: 99%

A journey into the electrochemistry of vanadium compounds

Galloni

Conte

2015

Coordination Chemistry Reviews

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Section: Complexes With Tetradentate Ligandsmentioning

confidence: 99%

A journey into the electrochemistry of vanadium compounds

Galloni

Conte

2015

Coordination Chemistry Reviews

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“…In our previous studies, CoPc and MnPc complexes were introduced to the literature as active electrocatalysts for ORR in aprotic solvents. 7,27,28 Our catalytic studies illustrated that MPcs undergoing in particular metal-based reduction reactions behave as active ORR catalysts. With the insight of these studies, we conceived that TiOPcs synthesized with our research group could be used as candidate electrocatalysts, since TiOPcs gave five reduction reactions in solution and two of them are metal-based reduction reactions.…”

Section: Introductionmentioning

confidence: 79%

Oxygen reduction reaction catalyzed with titanyl phthalocyanines in nonaqueous and aqueous media

Demir

Erdoğmuş

Koca

2013

Phys. Chem. Chem. Phys.

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Electrochemical and in situ spectroelectrochemical behaviors and electrocatalytic reduction of molecular oxygen with titanyl phthalocyanines (TiPc) bearing 3,4-(methylenedioxy)-phenoxy substituents were performed in aprotic solvents. Multi electrons and metal-based and ring-based redox processes of TiPcs indicate their possible electrocatalytic activity toward many target species. Different numbers and positions of the substituents of the complexes affect the peaks' character and assignment of the processes. The presence of O2 in the electrolyte system influences the electrochemical and spectral responses of TiPcs. Electrochemical and in situ spectroelectrochemical analysis indicates interaction of molecular oxygen with TiPcs and these interaction mechanisms depend on both the substituent environments of the complexes and the electrolyte system. Langmuir-Blodgett films of the complexes also catalyze molecular oxygen in aqueous media, which is a desired property for their practical application.

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“…The spectral changes of these complexes supported the proposed structure of the complexes and assigned redox mechanism. Figure shows in situ spectroelectrochemical responses of Cl–MnPc(MOR‐NAF) as an example . Neutral Cl–MnPc(MOR‐NAF) shows two distinct bands at 498 nm and 734 nm which are characteristic bands for Mn III oxidation state of the central metal of the complex .…”

Section: Resultsmentioning

confidence: 99%

“…Under −0.30 V applied potential, while the band at 498 nm disappears, the band at 734 nm decreases and a new band increases at 630 nm. These spectral changes illustrate the formation of [Cl −1 ‐Mn II Pc −2 ] −1 from the reduction of [Cl −1 ‐Mn III Pc −2 ] (Figure a) . Clear isosbestic points at 534 and 665 nm illustrate the chemical reversibility of the redox process.…”

Section: Resultsmentioning

confidence: 99%

Electropolymerization of Metallophthalocyanines Carrying Redox Active Metal Centers and their Electrochemical Pesticide Sensing Application

2017

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In this study, modified electrodes were constructed with the electropolymerization of metallophthalocyanines (MPcs) carrying redox active metal cations and electropolymerizable substituents. Then these electrodes were tested as selective and sensitive electrochemical pesticide sensors. Incorporation of the redox active Co(II) (CoPc(MOR‐NAF)), Cl–Mn(III) (MnPc(MOR‐NAF)), and Ti(IV)O (TiOPc(MOR‐NAF)) metal cations into Pc cavity increased the redox activity of Pc ring. Moreover, redox active and electropolymerizable 5‐{[(1E)‐(4‐morpholin‐4‐ylphenyl)methylene]amino}‐1‐naphthoxy substituents (MOR‐NAF) on the Pc ring triggered coating of the complexes on the electrode surface with the electropolymerization reactions. Therefore, modified electrodes GCE/MPc(MOR‐NAF) were constructed with the electropolymerizations of MPcs. These electrodes illustrated reasonable redox activity and conductivity for the potential applications in different fields of the electrochemical technologies. Pesticide sensing measurements indicated that changing the metal center of the complexes significantly altered their sensing activities. Among the complexes, GCE/CoPc(MOR‐NAF) electrode behaved as the most sensitive and selective electrode and it sensed the parathion with good selectivity and sensitivity. GCE/CoPc(MOR‐NAF) electrode showed a wider linear range (0.075‐5.75 μmoldm−3) and smaller LOD (0.025 μmoldm−3) and higher sensitivity (3.46 Acm−2M−1) for the parathion sensing. Although GCE/TiOPc(MOR‐NAF) electrode also sensed the parathion with a high sensitivity, its selectivity was poor and the linear range of this sensing was very narrow. Differently GCE/Cl–MnPc(MOR‐NAF) electrode only sensed eserine with reasonably sensitivity.

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Synthesis and electrochemical and in situ spectroelectrochemical characterization of manganese, vanadyl, and cobalt phthalocyanines with 2-naphthoxy substituents

Cited by 39 publications

References 47 publications

A journey into the electrochemistry of vanadium compounds

A journey into the electrochemistry of vanadium compounds

Oxygen reduction reaction catalyzed with titanyl phthalocyanines in nonaqueous and aqueous media

Electropolymerization of Metallophthalocyanines Carrying Redox Active Metal Centers and their Electrochemical Pesticide Sensing Application

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