Moisanu Casandra M, Eckvahl Hannah J, Stern Charlotte L, Wasielewski Michael R, Dichtel William R
J Am Chem Soc. 2024 Oct 3. doi: 10.1021/jacs.4c07288.
Molecular electron spin qubits arranged in precise arrays have great potential for use in quantum information science applications. Molecular qubits are synthetically versatile and can be placed in ordered arrangements upon incorporation into a new class of materials known as paired-ion frameworks (PIFs). A PIF composed of vanadyl porphyrin molecular qubits, , was synthesized as single crystals. Electron paramagnetic resonance spectroscopy was used to study their spin coherence at temperatures up to 293 K. A suspension of at 5 K in dimethylformamide (DMF) had a spin-spin relaxation time () of 270 ns. In DMF- and at 5 K, the coherence time of this material increased to 370 ns. This increase in is attributed to the lower gyromagnetic ratio of H compared to H, which results in weaker electron-nuclear dipolar coupling that reduces the effect of nuclear spin flips on electron spin coherence. In toluene, crystals of had a of 31 ns at 293 K, demonstrating that PIFs are a promising platform for creating materials for quantum information science applications.
排列成精确阵列的分子电子自旋量子比特在量子信息科学应用中具有巨大潜力。分子量子比特具有合成多样性，并且在掺入一类称为配对离子框架（PIF）的新型材料中时可以以有序排列放置。一种由钒基卟啉分子量子比特组成的PIF被合成成单晶。电子顺磁共振光谱用于研究它们在高达293 K温度下的自旋相干性。在5 K的二甲基甲酰胺（DMF）中，的悬浮液具有270 ns的自旋 - 自旋弛豫时间（）。在DMF中且在5 K时，该材料的相干时间增加到370 ns。的这种增加归因于与H相比，H的旋磁比更低，这导致电子 - 核偶极耦合较弱，从而降低了核自旋翻转对电子自旋相干性的影响。在甲苯中，的晶体在293 K时的为31 ns，表明PIF是用于创建量子信息科学应用材料的有前途的平台。
