To exploit Cr(III) coordination complexes as sensitizers in supramolecular energy-converting devices, the latter optical relays should display long-lived excited states, broad emission bands, and tunable spatial and electronic connections to activator units. An ad-hoc versatile strategy has been therefore developed for the preparation of a family of luminescent pseudo octahedral [CrN6] chromophores made up of ter-bidentate heteroleptic [Cr(phen)(2)(N-N")](3+) complexes, where phen is 1,10-phenanthroline, and N-N' stands for alpha,alpha'-diimine ligands possessing peripheral substituents compatible with both electronic tuning and structure extensions. As long as the ligand field in these [CrN6] chromophores remains sufficiently strong to avoid back intersystem crossing, photophysical studies indicate that the lifetime of the near infrared emissive Cr(E-2) excited state is poorly sensitive to ligand-based electronic effects. On the contrary, a drop in symmetry, the coupling with high frequency oscillators, and the implementation of sterical constraints in heteroleptic [Cr(phen)(2)(N-N')](3+) complexes affect both Cr(E-2 -> (4)A(2)) energies and Cr(E-2) lifetimes. Altogether, [Cr(phen)(2)(phenAlkyn)](3+) (phenAlkyn = 5-ethynyl-1,10-phenanthroline) and [Cr(phen)(2)(dpma)](3+) (dpma = di(pyrid-2-yl)(methyl)amine) complexes mirror the favorable photophysical properties of homoleptic [Cr(phen)(3)](3+) and thus emerge as the best heteroleptic candidates for acting as sensitizers at room temperature, and below 100 K, respectively, in more complicated architectures.