Modelling Conformational Flexibility in a Spectrally Addressable Molecular Multi‐Qubit Model System

Dipolar coupled multi‐spin systems have the potential to be used as molecular qubits. Herein we report the synthesis of a molecular multi‐qubit model system with three individually addressable, weakly interacting, spin [Formula: see text] centres of differing g‐values. We use pulsed Electron Paramagnetic Resonance (EPR) techniques to characterise and separately address the individual electron spin qubits; Cu(II), Cr(7)Ni ring and a nitroxide, to determine the strength of the inter‐qubit dipolar interaction. Orientation selective Relaxation‐Induced Dipolar Modulation Enhancement (os‐RIDME) detecting across the Cu(II) spectrum revealed a strongly correlated Cu(II)‐Cr(7)Ni ring relationship; detecting on the nitroxide resonance measured both the nitroxide and Cu(II) or nitroxide and Cr(7)Ni ring correlations, with switchability of the interaction based on differing relaxation dynamics, indicating a handle for implementing EPR‐based quantum information processing (QIP) algorithms.