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Crown Ethers with Fluctuating Ring Size (“Breathing Crown Ethers”) - Schröder - 1979 - Angewandte Chemie International Edition in English - Wiley Online Library
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Ring Size Effects on Multi‐Stimuli Responsive Luminescent Properties of Cyclic Amine Substituted β‐Diketones and Difluoroboron Complexes - Wang - 2019 - Chemistry – An Asian Journal - Wiley Online Library
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