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An unprecedented spin cluster‐based network architecture {[NiII2(pdaa)(OH)2(H2O)]n (H2pdaa=1,4‐phenylene diacetic acid)}, comprising 1D linear chains of NiII ions crosslinked via Ni4O4 cubanes, forms under hydrothermal conditions; this 3D coordination network exhibits magnetic ordering at 23.9 K as well as a second magnetic ordering process at 2.8 K likely associated with a structural phase transition. [ABSTRACT FROM AUTHOR]

Cover Feature: Magnetic Phase Transitions in a Ni4O4-Cubane-Based Metal-Organic Framework (Chem. Eur. J. 34/2020) Keywords: cubanes; magnetic materials; metal-organic frameworks; nickel; phase transitions EN cubanes magnetic materials metal-organic frameworks nickel phase transitions 7512 7512 1 06/22/20 20200618 NES 200618 B Four eyes see more than two b : Operando EPR, XANES/EXAFS, ATR-IR, and UV/Vis spectroscopy have been coupled in the same experiment to complete the mechanistic puzzle in selective aerobic alcohol oxidation by a copper-TEMPO catalyst. Cubanes, magnetic materials, metal-organic frameworks, nickel, phase transitions. [Extracted from the article]