Crystalline Structural Intermediates of a Breathing Metal–Organic Framework That Functions as a Luminescent Sensor and Gas Reservoir



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A rod-packing, breathing MOF (1), with two crystalline structural intermediates (1 a and 1 b; H2btca=benzotriazole-5-carboxylic acid) has been investigated. An underlying net approach for analyzing possible breathing MOFs, and a set of geometric parameters that can quantitatively describe such a breathing structural feature, are suggested. The 3D luminescent MOF is a promising candidate for specific sensors with exceptional sorption capacity.