14075-08-2Relevant articles and documents
The electrochemistry of platinum phthalocyanine microcrystals - III. Electrochemical behaviour in aqueous electrolytes
Brown, Richard J.C,Kucernak, Anthony R
, p. 2573 - 2582 (2001)
Platinum phthalocyanine (PtPc) films applied to gold and glassy carbon (GC) surfaces have been shown to exhibit complex electrochemistry in aqueous media. Upon potentiodynamic cycling three anodic (0.81, 1.10 and 1.27 V) and two cathodic peaks (1.12 and 0.59 V vs SCE) develop. These processes are ascribed to phthalocyanine ring oxidation and reduction processes. This phthalocyanine ring electrochemistry is thought to be controlled by anion doping within the film, the large separation between corresponding anodic and cathodic processes being manifestations of barrier potential to anion movement within the film. A large reduction peak at -0.6 V is attributed to the mass expulsion of anions from the film.
Electrochemistry of platinum phthalocyanine microcrystals: I. Electrochemical behaviour in acetonitrile electrolytes
Jiang, Junhua,Kucernak, Anthony
, p. 2227 - 2239 (2000)
Platinum phthalocyanine (PtPc) microcrystals deposited upon platinum, glassy carbon and gold by a process of dry abrasion have been characterized by electrochemical techniques. This mechanical abrasion can produce good electronic contact and adhesion between the microcrystals and the electrode. The redox process of PtPc microcrystals is accompanied by two reversible electrochemical phase transformations, evidenced by a sharp peak and unusually large peak potential differences. Similar to conductive polymers, an obvious first-scan discrepancy and large capacitance are observed during electrochemical oxidation. Some of the intercalated anions remain in the re-reduced microcrystals and lead to a conductivity enhancement of the microcrystals, supported by AC impedance and X-ray photoelectron spectroscopy (XPS) results. Coulometry shows that the size of the anion determines the rate and degree of oxidation, and influences the reversible phase transformations. Chronoamperometry shows diffusion-controlled nucleation and growth kinetics, controlled by the diffusion of anions into the solid films. The conformational relaxation model was used to describe this process.
Comparative studies of photophysical and photochemical properties of solketal substituted platinum(II) and zinc(II) phthalocyanine sets
Zorlu, Yunus,Dumoulin, Fabienne,Durmu?, Mahmut,Ahsen, Vefa
, p. 3248 - 3258 (2010)
A complete set of platinum(II) solketal substituted phthalocyanines has been synthesized and characterized. To evaluate their potential as Type II photosensitizers for photodynamic therapy, comparative studies of their photophysical and photochemical properties with analogous zinc(II) series have been achieved: electronic absorption, fluorescence quantum yields, lifetimes, and fluorescence quenching by benzoquinone, as well as singlet oxygen generation and photodegradation. It appears that platinum(II) phthalocyanines are worth being used as Type II photosensitizers, as they exhibit good singlet oxygen generation and appropriate photodegradation.
