Investigation of the photophysical and eletrochemical properties of a free base tetrapyridyl porphyrin with meso carbon linked ruthenium(II) groups

摘要: Abstract Here a systematic investigation on regular type of porphyrin with outlying ruthenium groups, ({H2TPyP[Ru(terpy)(PPh3)2]4}8PF6), and the isolated substituent ([RuCl(terpy)(PPh3)2]PF6) is reported. Steady state as well time-resolved fluorescence absorbance were employed in association cyclic voltammetry. The steady spectroscopy data suggest that groups mostly interact second excited singlet orbitals ring, while lowest electronic properties are weakly perturbed. Moreover, attachment peripheral highly suggests appearance additional vibrational modes molecule, which leads to new internal conversion decay pathways quenches both radiative deactivation intersystem crossing form triplet states. Transient absorption electrochemical reveal absence charge transfer between ring moieties. Energy possible but not enough efficiently quench sites. Finally, our results shine light about future molecular engineering strategies can be aim obtain efficient harvesting tetraruthenated molecules.