Nanostructured morphologies of complexes containing porphyrin bridges between Pt(II) acetylide tethers

A self assembling method based on osmotic procedure allowed fabricating nanostructured aggregates of dinuclear complexes made of Zn-porphyrin bridges between Pt(II) acetylide tethers. The choice of experimental parameters, such as solvent/non solvent couple and temperature allows achieving nanostructures that look like rod-like crystals and spheres, the latter ones showing either solid or concave internal structures. The porphyrin bridged di-bis(triphenylphosphine)platinum phenylacetylide, porphyrin bridged di-bis(triphenylphosphine)platinum p-nitrophenylacetylide and porphyrin bridged di-bis(triphenylphosphine)platinum p-methoxyphenylacetylide, were synthesized by the coupling of 2,8,12,18-tetraethyl-5,15-diethynyl-3,7,13,17-tetramethylporphyrinatozinc(II) with the corresponding trans-[Pt(PPh3)2(C≡C–R)Cl] complexes (R = C6H5, C6H4NO2, C6H4OCH3). The molecular structures were assessed with NMR and ToF-SIMS studies and the nanostructure formation was revealed with SEM investigations. The results could be of interest for future applications in optoelectronic devices, sensors, biotechnology and light harvesting.