1. Solvent-Induced Change of Electronic Spectra and Magnetic Susceptibility of CoII Coordination Polymer with 2,4,6-Tris(4-pyridyl)-1,3,5-triazine.
- Author
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Polunin, Ruslan A., Burkovskaya, Nataliya P., Satska, Juliya A., Kolotilov, Sergey V., Kiskin, Mikhail A., Aleksandrov, Grigory G., Cador, Olivier, Ouahab, Lahcène, Eremenko, Igor L., and Pavlishchuk, Vitaly V.
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COORDINATION polymers , *COBALT compounds , *SOLVENTS , *ELECTRONIC spectra , *MAGNETIC susceptibility , *TRIAZINES - Abstract
One-dimensional coordination polymer [Co(Piv)2(4-ptz)(C2H5OH)2]n (compound 1, Piv- = pivalate, 4-ptz = 2,4,6-tris(4-pyridyl)-1,3,5-triazine) was synthesized by interaction of CoII pivalate with 4-ptz. Desolvation of 1 led to formation of [Co(Piv)2(4-ptz)]n (compound 2), which adsorbed N2 and H2 at 78 K as a typical microporous sorbent. In contrast, absorption of methanol and ethanol by 2 at 295 K led to structural transformation probably connected with coordination of these alcohols to CoII. Formation of 2 from 1 was accompanied by change of color of sample from orange to brown and more than 2-fold decrease of molar magnetic susceptibility (χM) in the temperature range from 2 to 300 K. Resolvation of 2 by ethanol or water resulted in restoration of spectral characteristics and χM values almost to the level of that of 1. χMT versus T curves for 1 and samples, obtained by resolvation of 2 by H2O or C2H5OH, were fitted using a model for CoII complex with zero-field splitting of this ion. [ABSTRACT FROM AUTHOR]
- Published
- 2015
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