ISSN 1070-4272, Russian Journal of Applied Chemistry, 2007, Vol. 80, No. 12, pp. 2077!2084. + Pleiades Publishing, Ltd., 2007.
Original Russian Text + M.S. Masalovich, L.P. Ardasheva, G.A. Shagisultanova, 2007, published in Zhurnal Prikladnoi Khimii, 2007, Vol. 80,
No. 12, pp. 1998 !2006.
AND INDUSTRIAL ORGANIC CHEMISTRY
Photochemical Reactions in Solutions of the Platinum(II)
Complex with 8-Quinolinol
M. S. Masalovich, L. P. Ardasheva, and G. A. Shagisultanova
Herzen Russian State Pedagogical University, St. Petersburg, Russia
Received May 29, 2007; in final form, October 2007
Abstract-The rate of photochemical reaction in solutions of luminescent platinum(II) complex with
8-quinolinol was studied in relation to the type of solvent, irradiation time, photon energy and intensity of
a luminous flux, concentration of the complex, and presence of oxygen. The structure of the photochemical
reaction product was studied by X-ray photoelectron, IR, and electronic absorption spectroscopy. The quan-
titative kinetic parameters and quantum yield of the photochemical reaction performed under various
irradiation conditions are reported.
Platinum(II) complexes exhibit a unique combina-
tion of optical, catalytic, and luminescence spectral
properties . An important feature is that plati-
num(II) complexes can aggregate or polymerize to
give photosensitive and luminescent supramolecular
Among these compounds are platinum(II) com-
plexes with Schiff bases like [PtSalen], which ex-
hibit photochemical activity and can electrochemically
polymerize. The study of photo- and electrochemical
reactions of platinum complexes with Schiff bases can
provide an insight into the mechanism of formation of
dimers and polymers . In this study, we ex-
amined photochemical reactions of the platinum(II)
complex with 8-quinolinol, a bidentate ligand co-
ordinated to platinum via oxygen and nitrogen atoms.
The structure of [Pt(qol)
], where qol is 8-quinolinol,
is as follows:
The electronically excited states (EESs) of [Pt(qol)
were characterized by luminescence spectral methods
[8, 13316]. However, the possibility of deactivation of
EESs by a photochemical reaction and structural rear-
rangement of the complex are still poorly understood.
These data are of practical importance since [Pt(qol)
can be used as monomer in electrochemical synthesis
of thin-layer conducting polymers .
The aim of this study was to analyze photostimu-
lated aggregation of [Pt(qol)
] to form new molecular
The complex [Pt(qol)
] was prepared by the mod-
ified procedure  from potassium tetrachloroplati-
and 8-quinolinol C
recrystallized from ethanol.
Since the platinum complex is a photochemically
labile compound in the presence of atmospheric ox-
ygen dissolved in the solution [10, 14], its synthesis
and preparation of its solutions for photochemical
experiments and recording of absorption and lumines-
cence spectra were performed in the dark.
8-Quinolinol and its platinum complex were iden-
tified by electronic absorption spectroscopy and X-ray
photoelectron spectroscopy (XPS). The UV-Vis ab-
sorption spectra of [Pt(qol)
] were recorded on
SF2000 and Shimadzu UV-2401 PC spectrophotom-
The X-ray photoelectron spectra were measured on
an Axis Ultra electron spectrometer (Kratos Ana-
lytical, UK) using monochromatic Al