Res. Chem. Intermed.
, Vol. 27, No. 7,8, pp. 739–746 (2001)
Radiation chemistry of Cu(II) tetrasulfophthalocyanine
in water –methanol system
, J. KALECI
and M. KROWICKA
Faculty of Chemistry, University of Wroclaw, F. Joliot-Curie 14, 50-383 Wroclaw, Poland
Trzebiatowski Institute of Low Temperature and Structure Research, Polish Academy of Sciences,
PO Box 1410, 50-950 Wroclaw, Okólna 2, Poland
Abstract—The effect of ionising radiation on copper(II)phthalocyanine3,4
tetrasodium salt (Cu(II)tspc
) in aqueous as well as in water-methanol solutions has been studied.
The determined yields of complex decomposition (measured on the basis of absorption decay) depend
on the composition of matrices and the dose applied.
The rate constant of electron scavenging by Cu(II)tspc
methanol-water (2 : 8 v / v) solutions has been determined using the pulse radiolysis technique. The
rate constant k
of scavenging of OH radicals applying the competion
method with p-nitrosodimethylaniline(pNDA) has been determined in aqueous solutions.
: Radiolysis; copper(II) tetrasulfophthalocyanine; rate constants.
Copper(II) phthalocyanine 3,4
tetrasulfonic acid, tetrasodium salt (Cu(II)
) belongs to the widely used metalphthalocyanines, a very important and
interesting class of compounds . The compounds possess two electronic ab-
sorption bands: B (absorption near 340 nm) and Q (commonly two bands between
600– 700 nm). These bands are connected with n
electrons of the double nitrogen
macro ring, illustrated by Formula 1 for the Cu(II)tspc
Such rings should be sensitive for both addition or abstraction of electrons and
radicals formed during irradiation. The knowledge of these processes should
be important in photodynamic cancer therapy, where metalphthalocyanines could
be used . Unfortunately, the metalphthalocyanines are very poorly soluble in
aqueous solutions. For this reason, we decided to study the sulfonated derivatives
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