Schwerin AF, Johnson JC, Smith MB, Sreearunothai P, Popovic D, Cerný J, Havlas Z, Paci I, Akdag A, MacLeod MK, Chen X, David DE, Ratner MA, Miller JR, Nozik AJ, Michl J. Toward designed singlet fission: electronic states and photophysics of 1,3-diphenylisobenzofuran. J Phys Chem A. 2010 Jan 28; 114(3):1457-73.