Synthesis and electrochemical properties of benzyl-mercapto and dodecyl-mercapto tetrasubstituted manganese phthalocyanine complexes

Abstract

Manganese tetrakis (benzyl-mercapto) phthalocyanine (MnTBMPc) and manganese tetrakis (dodecyl-mercapto) phthalocyanine (MnTDMPc) complexes were synthesized and their spectral and electrochemical properties are reported. Cyclic voltammetric data showed three reversible to quasi-reversible and two irreversible redox processes for both complexes. Ring substituents influenced the positions of both oxidation and reduction redox couples. Spectroelectrochemistry confirmed the first two reductions to be due to Mn The first example of a formation of self-assembled monolayers (SAMs) using thiol substituted MnPc complexes is presented, the SAMs were found to show blocking characteristics towards some faradaic reactions.

Electrochemical Capacitive Behaviour of Multiwalled Carbon Nanotubes Modified with Electropolymeric Films of Nickel Tetraaminophthalocyanine

“…Metallophthalocyanine (MPc) complexes are well known for their efficiency as sensors [9] and in photochemical [10,11] and electrocatalytic and electroanalytical applications [12][13][14][15][16][17][18]. The use of carbon nanotubes (CNTs) incorporated with MPc complexes in electrochemistry is gaining some attention [19,20].…”

Electrochemical Characterization of Self‐Assembled Monolayer of a Novel Manganese Tetrabenzylthio‐Substituted Phthalocyanine and Its Use in Nitrite Oxidation

“…The UV-visible bands at 360 and 511 nm give complex MnPc(SPh) 4 its deep red color [26]. The relatively large red shift of the Q-band (764 nm), typical of Mn III Pc complexes [4,15,26,27], is enhanced by the electron donating properties of sulfur.…”

Oxygen reduction reaction at MWCNT-modified nanoscale iron(ii) tetrasulfophthalocyanine: remarkable performance over platinum and tolerance toward methanol in alkaline medium

“…Shoulder peak in the high energy side of the Q band is usually due to poor solubility and molecular aggregation 15,31,32 and, in this case, most probably must have arisen from the long chain alkane substituents from the CTAB. The successful graing of the long alkyl chain onto the FeTSPc molecule caused steric hindrance, hence poor dispersion in solvent compared to the pristine FeTSPc molecule.…”