Abstract
This work reports on the synthesis, characterization and application as an optical sensor of two new porphyrin complexes namely :(Hexamethylenetetramine)(meso‐tetratrifluoromethylphenylporphyrinato) zinc(II) [Zn(TFMPP)(HMTA)] and (Hexamethylenetetramine)(meso‐tetra‐tert‐butylphenylphenylporphyrinato) Zinc(II) [Zn(TtBuPP)(HMTA)]. The chemical structures of these species were defined by 1HNMR and FT‐IR spectroscopic analysis. The optical properties of these π‐conjugated systems were investigated by UV‐visible, absorption and photoluminescence spectroscopy. The UV‐visible titrations show that the Soret and Q bands of the new complexes are red‐shifted compared to those of the starting material species [Zn(TFMPP)] and [Zn(TtBuPP)] and the association constants (Kas) was found to be depending on the withdrawing‐donating effects of the substituents on the phenyls ring of the meso‐porphyrins. The electrochemical behavior was also investigated and the optical and electrochemical energy gaps were determinate. The electronic properties of the ITO/Pi/Al have been defined by I–V characteristics and impedance spectroscopy measurements.
We report the synthesis of two new porphyrins complexes pentacoordinate zinc(II) complexes with the hexamethylenetetramine (HTMA) ligand. All the synthetic compounds were characterized by UV‐visible, photoluminescence, IR and 1H NMR spectroscopic techniques as well as by cyclic voltammetry investigation. The current‐voltage data and the ITO/Porph/Al diode systems with new zinc porphyrin complexes are described. These electrical studies indicate that our synthetic species can be used as an optical sensor.