Recent room-temperature quintet EPR studies of triplet-pairs composed of the four-spin qubits demonstrated the quantum coherences by the sublevel transitions between |mS = 0 > and |mS = ±1 > in the fine structure of the pentacene MOF and of the pentacene dimer. These were interpretated by the J, D-modulations by the conformation dynamics in the triplet excitons: the terahertz subtle conformational motions in the dihedral angles between the Z principal axes are the source of the quintet coherence, although the yields of such 'coherent TTs' were quite low. Thus, it is highly anticipated that the quantum sensing technology is applicable to detect the quick terahertz modulations influencing the J-coupling, such as the phonon motions associated with hydrogen bonding network in the protein matrices. On the other hand, the gigahertz disordered motions will induce the decoherences, as recently reported in a viscous solution on the triplet pairs. Both the spin coherence and the decoherence appear depending upon the different motional effects and thus are informative for the quantum sensing applications to detect the local environments of the inside the cells, the cell membranes and the protein matrices in the physiological conditions.