Quantum chemical sensing using molecular triplet qubits in a flexible metal–organic framework

Fig. 2. b, Plot of T2 obtained by the single-exponential fitting of the spin echo decay curves against the unit cell volume of MIL-53. c, Spin echo decay curves after pulsed photoexcitation at 532 nm for empty (D-MIL-53⸧DAT) and guest-filled (D-MIL- 53⸧[DAT+guest]) samples at room temperature. Fig. 3. a, Time-resolved EPR spectra at 0.1–0.5 μs for empty (D-MIL-53⸧DAT) and guest-filled (D-MIL- 53⸧[DAT+guest]) samples at room temperature. b, Decays of the ESR peaks at higher and lower magnetic field after pulsed photoexcitation at 532 nm for empty (D-MIL-53⸧DAT) and guest-filled (D-MIL- 53⸧[DAT+guest]) samples at room temperature. Fig. 4. Dependence of T2 on volume fraction occupied by the guest.