Abstract

procedure. Elemental analysis (%) calcd for C13H8NO4Cu: C 51.06, H 2.62, N 4.58; found C 50.62, H 2.45, N 4.60. Gas adsorption measurements: Sorption isotherms were measured at 298 K on an FMS-BG (BEL inc.) automatic gravimetric adsorption measurement system with Rubotherm magnet coupling balance incorporated in a SUS steel pressure chamber. A known weight (200±300 mg) of the as-synthesized sample was placed in the aluminum sample cell in the chamber, and the sample was dried under high vacuum at 373 K for 5 h to remove the host water molecules. The adsorbate was dosed into the chamber, and the change in weight was monitored. After correction for buoyancy, the absorbed amount was determined.

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