Photophysical and theoretical studies of structure and spectroscopic behaviour of axially substituted Yb(III) mono-phthalocyanines in different media

This paper is devoted to photophysical studies of the acetato- and chloro-ytterbium monophthalocyanine complexes in different media. Ab initio H–F and DFT methods were used to generate structures and IR and Raman spectra which correspond well to the experimental results of YbPcOAc2DMSO chelate. Efficient energy transfer from phthalocyanine states to Yb(III) 2F5/2 excited state was discovered and two types of the emission were observed anti-stokes emission was detected after excitation at 980nm confirming NL behaviour. The effort was made to explain the energy transfer mechanism and non-linear behaviour was analysed. The obtained polymeric materials are foto- and thermally stable and exhibit important spectroscopic parameters.