Somashekarappa, MP and Keshavayya, J and Sherigara, BS (2003) Synthesis and Spectroscopic Investigations of Iron(III) Complexes with Chlorides and Dianionic, Symmetrically Halogen Substituted Phthalocyanines as Ligands. In: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 59 (4). pp. 883-893.
Synthesis.pdf - Published Version
Restricted to Registered users only
Download (198Kb) | Request a copy
The synthesis of iron(III) complexes of general formula FeCl(R-pc), where R-pc are dianionic, symmetrically halogen substituted phthalocyanines at the positions 2,9,16,23 or 1,8,15,22, from the corresponding amino substituted derivatives is described (R= Cl, Br, I) The complexes are characterized by UV-visible and infrared spectra, powder X-ray diffraction and magnetic susceptibility measurements. The effect of substituents at the periphery and the basicity of the solvents used on the electronic spectra are iscussed. The Q band of the electronic spectra for symmetrically halogen substituted derivatives are redshifted and the substituents at 2,9,16,23- positions are more effective in redshifting the Q bands than those at 1,8,15,22-positions. Depending upon the basicity of the solvents, the ligand-to-metal charge transfer (LMCT) transitions on Q band envelop shift to the higher energy region in the order of pyridine>DMF>DMSO. The infrared absorption signals for C-H and metal-ligand vibrations appear to be sharper for 1,8,15,22 substituted derivatives than for 2,9,16,23 substituted ones.
|Item Type:||Journal Article|
|Additional Information:||Copyright of this article belongs to Elsevier.|
|Keywords:||Iron(III) phthalocyanine complexes;UV-visible;IR;Charge transfer transitions|
|Department/Centre:||Division of Chemical Sciences > Inorganic & Physical Chemistry|
|Date Deposited:||22 Jun 2006|
|Last Modified:||08 Jul 2011 10:46|
Actions (login required)