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The ethanol vapor adsorption behavior and the inclusion crystal structure of a 1D-transformable coordination polymer host were characterized. The adsorption jump was observed during phase transition or two-phase equilibrium with abnormal adsorption enthalpy caused by the nature of "mass induced phase transition." The included ethanol guests selectively form O-H...O hydrogen bonded pairs inside channels, suggesting selective construction of a specific cluster/aggregate in pores under control of thermodynamic factors and cooperative intermolecular interactions among the guest and channel surface.

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The structure of a linear chain complex [Rh(II)2(O2CPh)4(pyz)]∞ was characterized by X-ray diffraction analysis. The solid indicates nitrogen adsorption on a microporous medium although the crystal does not seem to have a microporous structure. There is a high possibility that the structure changes to open the crystal packing for gas molecules.

Sheer magnetism: The phase transitions and magnetic behavior of included oxygen in a single crystal were studied at low temperature. The system exhibits three correlated structural and magnetic phases. The distinct middle‐temperature phase shows a one‐dimensional‐chain arrangement of oxygen trimers with an anomalous magnetization response to external magnetic fields.