1354946-57-8Relevant articles and documents
Spectroscopic studies on the intermolecular charge transfer interaction of Fe(II)- and Fe(III)-phthalocyanines with 2,3,5,6-tetrachloro-1,4-benzoquinone and its application in colorimetric sensing of amino acids and amines
Balraj, Chellamuthu,Elango, Kuppanagounder P.
, p. 44 - 50 (2012/01/31)
The interactions of FeIIPc and FeIIIPc with π-acceptor 2,3,5,6-tetrachloro-1,4-benzoquinone (p-chloranil, p-CHL) have been investigated spectroscopically (UV/vis and FT-IR) and spectrofluorimetrically at three different temperatures. The stoichiometry of the complexes was found to be 1:1. The results of electronic spectral studies indicated that the formation constant for FeIIPc-p-CHL system is found to be higher than that for FeIIIPc-p-CHL system. This observation is well supported by the results of fluorescence quenching studies and the association constants calculated for FeIIPc-p-CHL system is 4.2 × 103 mol L-1 and that for Fe IIIPc-p-CHL system is 2.2 × 103 mol L-1. The data are discussed in terms of physico-chemical parameters viz. molar extinction coefficient, oscillator strength, dipole moment, ionization potential, dissociation energy and thermodynamic parameters. The results indicated that the formation of π-π CT complex is spontaneous and endothermic. Preliminary studies indicated that the CT complex can effectively be used as a colorimetric agent for sensing amino acids and amines.
