2026-10-09 東京大学
MOF 中の励起三重項スピンの光検出
＜関連情報＞
- https://www.s.u-tokyo.ac.jp/ja/press/11244/
- https://pubs.acs.org/jacsat/article/doi/10.1021/jacs.6c12867/5447489/Optically-Addressable-Spins-in-a-Metal-Organic
金属有機構造体中の光学的に制御可能なスピン Optically Addressable Spins in a Metal–Organic Framework
Miku Inoue;Wataru Ishii;Thomas W. Bradbury;Hiroki Nagashima;Alistair Inglis;Yoshitaka Aoyama;Yusuke Nishiyama;Mizue Asada;Toshikazu Nakamura;Kiminori Maeda;Yasuhiro Kobori;Jenny Clark;Sam L. Bayliss;Nobuhiro Yanai
Journal of the American Chemical Society Published:October 09, 2026
DOI:https://doi.org/10.1021/jacs.6c12867
Abstract
Molecular spins supporting optically detected magnetic resonance (ODMR) offer unique opportunities for quantum sensing and many-body physics by combining the sensitivity and spatial resolution offered by optical spin detection with the capacity for bottom-up assembly and chemical control. Metal–organic frameworks (MOFs) are a promising architecture to leverage such opportunities since they offer control over spin placement, tunable porosity and large internal surface areas for efficient integration with sensing targets, and a richly tunable chemical space. However, optical spin readout has not been demonstrated in a MOF. Here, we report the first successful optical detection of spins in a MOF. We use a porphyrin-based aluminum MOF (Al-PMOF), which supports efficient triplet generation on the porphyrin chromophore ligands. Using electron paramagnetic resonance, we demonstrate that these triplet states support a spin coherence time (T2) on the order of a few microseconds at 50 K. Importantly, we successfully detect optically detected magnetic resonance of these triplets using near-infrared ODMR at 77 K. Optical spin readout in a MOF paves the way for next-generation quantum sensing applications that leverage bottom-up assembly.
