Electron paramagnetic resonance spectra have been recorded with an ELEXSYS-E500 (Bruker, Germany) spectrometer (X-band, the sensitivity up to 10 10 spin/g) at stabilized temperature. The measurement temperature was kept at 130-300 K range with a Bruker ER 4112HV temperature control system. The concentration of paramagnetic centers (PCs) was evaluated using CuCl 2 •2H 2 O single crystal with known number of spins as the standard. Recorded EPR spectra are shown in Fig. . Estimates of PCs are listed in Table .