QUBEKit has been tested on the liquid properties of a set of 109 organic molecules and the resulting force field demonstrated comparable or better accuracy in predicting liquid densities, heats of vaporisation, and free energies of hydration, compared to OPLS and GAFF. In addition, normal mode vibrational frequencies calculated from the QUBE force field show good agreement with QM frequencies. This advantage can be particularly valuable for modelling TADF molecules, where low-frequency torsional modes are thought to play an important role in assisting the emission process 3 and enhancing coupling between excited states via conformational fluctuations, and high frequency modes can strongly influence the shapes of the ground and excited state potential energy surfaces.