Deposition of tetraferrocenylporphyrins on ITO surfaces for photo-catalytic O₂activation

Abstract

Tetraferrocenylporphyrins (TFcPs) are a class of compounds where the porphyrin macrocycle is functionalized with a ferrocenyl group at each of the four meso positions. TFcPs exhibit interesting electrochemical properties, mostly due to electronic communication between the ferrocenyl substituents and the porphyrin core. This leads to their capability to release and accept multiple electrons at distinct potentials through reversible and well distinguished processes. Synthesis of substituted-tetraferrocenylporphyrins containing a carboxylic acid functionality allowed to prepare well packed thin layers of TFcP on ITO electrodes using different deposition techniques. In this context, self-assembled monolayers (SAMs) and Langmuir-Blodgett mono- and multilayers (LBs) of TFcPs have been prepared on ITO surfaces. TFcP-functionalized ITO electrodes showed very high stability, and their application in photocatalytic oxygen activation has been tested.

Modular Construction of Photoanodes with Covalently Bonded Ru- and Ir-Polypyridyl Visible Light Chromophores

“…The surface coverages (Γ) by Ir and Ru in ITO-[(phen)­Ir­(ppy) 2 ] + and ITO-[(phen)­Ru­(bpy) 2 ] 2+ were estimated from their solid-state UV–vis absorption spectra with eq , employing the molar extinction coefficients (ε) measured for cis -[Ir­(ppy) 2 (phen)] + and [Ru­(bpy) 2 (phen)] 2+ in CH 2 Cl 2 solutions at 440 nm. , …”

Similar, Yet Different: Long-Range Metal–Metal Coupling and Electron-Transfer Processes in Metal-Free 5,10,15,20-Tetra(ruthenocenyl)porphyrin

“…Because of their excellent thermal, photochemical, and chemical stability, metallocenyl and, in particular, ferrocenyl-containing porphyrins ,,− and related compounds such as phthalocyanines, − BODIPYs, − aza-BODIPYs, ,− and BOPHYs , have attracted a lot of academic interest in recent years. Not surprisingly, the overwhelming majority of investigated metallocenyl porphyrinoids consists of ferrocenyl substituents appended to the macrocycle in almost every exploitable position. , On the contrary, the examples of molecular systems containing both a porphyrinoid macrocycle or analogues dye and a ruthenocenyl substituent are quite rare.…”

3,7‐Bis(N‐methyl‐N‐phenylamino)phenothiazinium Salt: Improved Synthesis and Aggregation Behavior in Solution

“…Furthermore, linking our experience in synthesis optimization [24][25][26][27][28][29][30][31] together with a broad investigation of literature data, we have also optimized a one-pot reaction, aimed to overcome the aforementioned synthetic troubles, thus improving the application of this class of compounds as dyes in the solar cells field, in the photodynamic therapy, likewise to study their interactions with DNA and proteins. [32] the π-stacked dimer of MB (Figure 1) converged to a minimum of energy, whereas the dimeric form of 1 did not.…”