Photoresponsive Fe-Organic MOF materials

Photoresponsive MOF materials are exciting candidates for various applications, including, but not restricted to, controlled gas capture/storage/release. We have utilized the state-of-the-art gas-phase atomic-molecular layer deposition (ALD/MLD) thin-film technique to incorporate fully functional photoresponsive linkers into a crystalline metal-organic matrix. The ALD/MLD synthesis yields in-situ crystalline iron-azobenzene/stilbene thin films which provide a suitable environment for the efficient trans-cis photoisomerization reaction to occur. Here, we aim in ex-situ 1s2p RIXS measurements at the iron pre-edge region of various photoresponsive metal-organic thin-film samples. Our goal is to gain understanding of the changes in the local environment of iron when these materials are reversibly irradiated by UV and visible light, and to relate the structural changes to changes in the materials’ properties.光响应金属有机框架（MOF）材料是一类极具应用潜力的候选材料，其应用场景涵盖可控气体捕获、储存与释放等诸多领域，且不限于上述方向。本研究采用当前前沿的气相原子分子层沉积（ALD/MLD）薄膜制备技术，将具备完整功能的光响应连接体引入结晶金属有机基质中。通过ALD/MLD合成法可原位制备得到结晶态铁-偶氮苯/二苯乙烯薄膜，该薄膜可为高效反式-顺式光异构化反应提供适宜的发生条件。本研究旨在对各类光响应金属有机薄膜样品的铁预边区域开展非原位1s2p共振非弹性X射线散射（RIXS）测量。本研究的目标是阐明这类材料经紫外光与可见光可逆辐照后，铁原子局域环境的变化，并将结构变化与材料性能的改变建立关联。