Sandwich double-decker Er(iii) and Yb(iii) complexes containing naphthalocyanine moiety: synthesis and investigation of the effect of a paramagnetic metal center.

Novel heteroleptic Er(iii) and Yb(iii) naphthalocyaninato-phthalocyaninates containing an octa-phenyl or octa-phenoxysubstituted naphthalocyanine deck were synthesised and identified by H NMR, EPR and high resolution MALDI-TOF/TOF mass spectrometry. Direct synthesis of novel homoleptic Yb(iii) bis (octa-phenylnaphthalocyaninate) was carried out. Downfield lanthanide induced shifts of the aromatic protons in target compounds were observed compared with the corresponding diamagnetic Lu(iii) complexes.

Groundwater of the Crimean peninsula: a first systematic study using stable isotopes.

Karst springs in the Main Range of the Crimean Mountains and the Crimean Piedmont show a restricted range of values (δO = -10.5 to -8.0 ‰, δH = -72 to -58 ‰), somewhat more negative than the weighted mean of meteoric precipitation.