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Instruments / Technical Area	Publication Details	Published	Actions
I11-High Resolution Powder Diffraction	Control of zeolite pore interior for chemoselective alkyne/olefin separations Yuchao Chai , Xue Han , Weiyao Li , Shanshan Liu , Sikai Yao , Chong Wang , Wei Shi , Ivan Da Silva , Pascal Manuel , Yongqiang Cheng , Luke D. Daemen , Anibal J. Ramirez-cuesta , Chiu C. Tang , Ling Jiang , Sihai Yang , Naijia Guan , Landong Li Science 368, 1002 - 1006 DOI: 10.1126/science.aay8447 Diamond Proposal Number(s): [23483] Open Access Show Abstract ▼ Abstract: The efficient removal of alkyne impurities for the production of polymer-grade lower olefins remains an important and challenging goal for many industries. We report a strategy to control the pore interior of faujasite (FAU) zeolites by the confinement of isolated open nickel(II) sites in their six-membered rings. Under ambient conditions, Ni@FAU showed remarkable adsorption of alkynes and efficient separations of acetylene/ethylene, propyne/propylene, and butyne/1,3-butadiene mixtures, with unprecedented dynamic separation selectivities of 100, 92, and 83, respectively. In situ neutron diffraction and inelastic neutron scattering revealed that confined nickel(II) sites enabled chemoselective and reversible binding to acetylene through the formation of metastable [Ni(II)(C2H2)3] complexes. Control of the chemistry of pore interiors of easily scalable zeolites has unlocked their potential in challenging industrial separations.	May 2020
B23-Circular Dichroism I19-Small Molecule Single Crystal Diffraction	Cation-induced chirality in a bifunctional metal-organic framework for quantitative enantioselective recognition Zongsu Han , Kunyu Wang , Yifan Guo , Wenjie Chen , Jiale Zhang , Xinran Zhang , Giuliano Siligardi , Sihai Yang , Zhen Zhou , Pingchuan Sun , Wei Shi , Peng Cheng Nature Communications 10 DOI: 10.1038/s41467-019-13090-9 Diamond Proposal Number(s): [20293] Open Access Show Abstract ▼ Abstract: The integration of luminescence and chirality in easy-scalable metal-organic frameworks gives rise to the development of advanced luminescent sensors. To date, the synthesis of chiral metal-organic frameworks is poorly predictable and their chirality primarily originates from components that constitute the frameworks. By contrast, the introduction of chirality into the pores of metal-organic frameworks has not been explored to the best of our knowledge. Here, we demonstrate that chirality can be introduced into an anionic Zn-based metal-organic framework via simple cation exchange, yielding dual luminescent centers comprised of the ligand and Tb3+ ions, accompanied by a chiral center in the pores. This bifunctional material shows enantioselectivity luminescent sensing for a mixture of stereoisomers, demonstrated for Cinchonine and Cinchonidine epimers and amino alcohol enantiomers, from which the quantitative determination of the stereoisomeric excess has been obtained. This study paves a pathway for the design of multifunctional metal-organic framework systems as a useful method for rapid sensing of chiral molecules.	Nov 2019

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