Title
Luminescent water-soluble cycloplatinated complexes: structural, photophysical, electrochemical and chiroptical properties
Author
Andreea Ionescu, Nicolas Godbert, Loredana Ricciardi, Massimo La Deda, Iolinda Aiello, Mauro Ghedini, Isabella Rimoldi, Edoardo Cesarotti, Giorgio Facchetti, Giuseppe Mazzeo, Giovanna Longhi, Sergio Abbate, Marco Fusè
Year
2017
Journal
Inorganica Chimica Acta
Abstract
The luminescent square-planar Pt(II) complexes of the type [Pt(C^N)(N^N)]+X- have been synthesised, where (C^N) is cyclometallated 2-phenylpyridine ligand, (N^N) a chiral diamine and BF4- or CH3COO- as counterion (X-) have been synthesised. The chiral diamine Campy has been used, resulting in a mixture of regioisomers. The complexes were characterised and their structures in solution were determined by a combination of different spectroscopic and chiroptical techniques (NMR, UV-Vis, ECD, IR, VCD and CPL) associated with electrochemical, DFT and TDDFT studies. Remarkably, the acetate derivatives proved to be soluble and stable in water for at least a month. The electrochemical behaviour of the [Pt(C^N)(N^N)]BF4 was investigated and the LUMO energies were estimated. The photophysical properties of the new compounds were deeply investigated in water or dimethyl sulfoxide solution by UV-Vis, steady state emission and time-correlated single-photon counting spectroscopy.
Instrument
FP-8200
Keywords
Fluorescence, Inorganic chemistry