Ti(IV) phthalocyanines for dye sensitized solar cells

Abstract

Ti(IV) phthalocyanines axially coordinated to 2,3-and 1,8-naphthalenediols have been prepared and characterized. The naphthalene axial ligands have been endowed with none, one or two sulfonate anchoring groups in order to study the performance of the dyes as DSC photosensitizers. All studied compounds showed the same efficiency. The unexpected results suggest displacement of the axial ligand with concomitant formation of a di-m-oxotitanium-type anchoring moiety between the hydroxylated TiO 2 surface and the Ti-phthalocyanine. This is probably the reason why the type of axial ligand does not play any role on the overall device efficiency. The titanium phthalocyanine absorbed in this way shows state selective electron injection were only those photons absorbed by the Soret band are capable to inject electrons into the TiO 2 , while photons absorbed by the Q-band result in negligible photocurrent. This fact could explain the low efficiency of the Ti-phthalocyanines.

Novel axially symmetric and unsymmetric silicon(iv) phthalocyanines having anti-inflammatory groups: synthesis, characterization and their biological properties

“…Therefore, Pc derivatives can be applied in medicinal and pharmaceutical product development with commercial and industrial application. 3 Pc compounds are widely used in several implementations in biotechnology and the healthcare industry, such as solar cells, 4 photodynamic therapy 5,6 and catalysts. 7 To date, they have not only shown a broad range of biological properties, such as antioxidant, 8 antimicrobial, 9 antifungal, 10 and in vitro / in vivo anticancer effects, 11,12 but a few derivatives of Pcs have also been clinically approved like Photosens.…”

Metallo‐phthalocyanines Containing 1,3,4‐oxadiazole Substituents: Synthesis, Characterization, Electrochemical and Spectroelectrochemical Properties

“…In the mass spectrum the [M + H] + peak also verified the structure of (5).All the spectral data were in harmony with the previously prepared phthalonitriles. [24,25] Peripherally tetra 4-(4-(5-(undecylthio)-1,3,4-oxadiazol-2yl)phenoxy) substituted MPcs (6)(7)(8)(9) were prepared via a cyclotetramerization reaction between compound (5) and related metal salt, in n-pentanol. When the IR spectra of MPcs (6-9)were examined, no significant difference was observed due to the different metal centers.…”

“…So (6)(7)(8)(9) were prepared via a cyclotetramerization reaction between phthalonitrile (5) and related metal salt, in n-pentanol. MPcs were prepared as nickel (II) (6), chloromanganese(III) (7), cobalt(II) (8) and copper(II)(9) metal centered to investigate the effect of the metal ion on electrochemical results.The cyclic voltammetry (CV) and square wave voltamme-try (SWV) measurements were performed to illuminate the redox properties of compounds (6)(7)(8)(9), in DCM/TBAP electrolyte on a glassy carbon electrode. The redox mechanism and color properties of compounds were investigated with electrochemical and in-situ spectroelectrochemical (SEC) measurements.…”

Peripheral or nonperipheral tetra‐[4‐(9H‐carbazol‐9‐yl)phenoxy] substituted cobalt(II), manganese(III) phthalocyanines: Synthesis, acetylcholinesterase, butyrylcholinesterase, and α‐glucosidase inhibitory effects and anticancer activities

“…[ 1 ] They usually have been used as an agent in various applications such as biosensor, catalysis, optical devices, photovoltaics, solar cells, and photodynamic therapy. [ 2–7 ] From the first synthesis to date, research on phthalocyanines has been gained interest in pharmaceutical and biological applications such as anticancer, antioxidant, antifungal, and enzyme inhibition. [ 8–12 ] There are several metal ions in the core of phthalocyanine such as Zn(II), Mg(II), Co(II), and Ga(III), and these ions play significant roles for the photophysical, photochemical, and enzyme inhibition properties of the compounds.…”