Photophysical properties of {[Ag(CN)2](-)}2 complexes trapped in a supramolecular electron-acceptor organic framework.

The organic acceptor 1,1'-bis-(2,4-dinitrophenyl)-4,4'-bipyridinium (DNP(2+)) reacts with dicyanoargentate to form a supramolecular complex with the general formula: {[Ag(CN)2]2DNP}·2H2O. The photophysical properties of this complex were determined using solid-state luminescence experiments including luminescence lifetime measurements. Luminescence of the dicyanoargentate dimers is observed both by direct excitation of the silver dimers as well as excitation of the DNP(2+) followed by indirect non-radiative energy transfer to the silver dimer units for emission.

Structure and emissive properties of heterobimetallic Ln-Au coordination polymers: role of Tb and Eu in non-aurophilic [nBu4N]2[Ln(NO3)4Au(CN)2] versus aurophilic Ln[Au(CN)2]3·3H2O/3D2O chains.

This investigation is focused on comparing photophysical properties between two series of lanthanide-dicyanoaurate coordination polymers that contain and lack aurophilic interactions, respectively. Luminescence and crystallographic studies have been carried out on five different coordination polymer chain frameworks: the non-aurophilic [(n)Bu4N]2[LnxGd1-x(NO3)4Au(CN)2] (Ln = Eu, Tb; x = 0.01, 0.