NEXAFS spectroscopy investigation on the electronic structure of newly synthesized Pt(II)/Zn-porphyrinato assemblies

Spectroscopic investigations on the electronic structure of thin films of various Zn-porphyrinato/Pt assemblies, consisting of a Zn-porphyrinato (ZnPf) macrocycle inserted between bis(phosphine)platinum(II) centres, were carried out by means of synchrotron radiation-induced near-edge x-ray absorption fine structure (NEXAFS) spectroscopy at the third-generation storage ring ELETTRA and at SuperACO. The spectra of the monomeric ZnPf and of the porphyrin-free base were also investigated for comparison. Modifications occur mainly at the N K-edge, when Zn metallation is carried out, arising from nitrogen deprotonation, and significant changes are also observed upon linkage between subunits.