for TRI(N) and ω=0.05 for TRI(B) were chosen. The results are shown in Table and Figure and denoted as LC-ωPBE* in comparison to LC-ωPBE with default ω (ω = 0.4). By using these target application-tuned values of ω, we significantly improve the values for ΔEspin with MAE and MRE of 0.13 eV and -0.02% compared with that of 0.73 eV and 82% in LC-ωPBE with default ω as well as other hybrid functionals. Also, its values for J with MAE and MRE of 13.13 meV and -25% are comparable to those calculated with PBE0 and M06-2X. This demonstrates the effectivity of rangeseparated hybrid functionals for strong-correlated systems, however, the rangeseparation parameter must be adjusted based on the electron correlations in order to achieve accurate predictions. This may be a suitable approach for studying oligomers or polymers based on the same monomer. Current developments for optimizing the range-separation parameter based on Koopman's theorem might provide useful alternatives in the future and a generalized multireference-DFT method could also give more accurate predictions.