Energies for the motion of diatomic molecules (homonuclear or heteronuclear diatomic molecule-simplest spatial arrangement of atoms in geometry) can result into the translational, rotational, and vibrational energies. They are normally in the X excited electronic state. The higher electronic states like A, B, C etc can cause fluorescence due to transitions with the emittance of photons. I wish to know anyone studying the electronic structure of diatomic molecules/ diatomic molecular interaction for biological applications e.g membrane interaction?