CCSD Researchers Create Two Open-source Datasets for Quantum Chemical Prediction of UV/Vis Absorption Spectra for Organic Molecules February 1, 2023 We released two open-source datasets named GDB-9-Ex and ORNL_AISD-Ex that provide calculations of electronic excitation energies and their associated oscillator strengths based on the time-dependent density-functional tight-binding (TD-DFTB) method.