In addition to having coherence times of up to 10 μs and a spin-photon interface, optically addressable molecular spin qubits have the potential to be tunable, modular and scalable. We leverage chemical synthesis methods for bottom-up design of these molecular qubits. We have demonstrated optical addressability of the spin-1 ground-state of a chromium (IV) molecular complex, shown enhancement of the coherence of the chromium spin qubit through host matrix engineering, and shown the tunability of the spin properties of this class of molecules through ligand field modification. We continue to explore structure-function relationships of novel molecular qubits with potential applications in quantum sensing, communication, and computing.
