This study presents an efficient photocatalytic oxidative deprotection of oximes using a pyrene-based hydrogen-bonded organic framework incorporated with copper (PFC-1@Cu) under visible light irradiation. The catalyst exhibits good functional group tolerance and affords excellent yields up to 97% for a variety of carbonyl derivatives. Gram-scale reactions validate its practical applicability, while repeated cycling tests confirm its high stability and reusability. Mechanistic investigations indicate the involvement of reactive oxygen species (ROS) in the photochemical process. This work not only expands the photocatalytic applications of HOF-based materials but also offers a sustainable and efficient strategy for carbonyl deprotection.

Luminescent materials with tunable emission wavelengths/colors hold great potential for smart response devices, data security, sensors, and so on. However, development of stimuli-responsive luminescent materials with traditional organic or inorganic luminophores remains challenging due to their lack of tunability. Herein, we report the tunable luminescence and ratiometric temperature sensing applications with a europium-organic cage (Eu₄L₄) featuring concentration-dependent hierarchical self-assembly behavior. Notably, white light emission was achieved by adjusting the equilibrium ratio between the red-emissive cage monomer and cyan-emissive cage aggregate. Taking advantage of the dual emissive nature of the system, ratiometric luminescent temperature sensing has also been achieved, exhibiting a sensitivity of 2.04% and linear correlation coefficient of 0.997 from 250 to 320 K.

By introduction of a new Fe(L¹)₂ spin-crossover (SCO) unit into the polynuclear system, a nano-scale Fe₄(L²)₄ molecular square architecture is designed through coordination-directed self-assembly strategy. Both the mononuclear Fe(L¹)₂ and tetranuclear Fe₄(L²)₄ complexes have been structurally confirmed by ¹H nuclear magnetic resonance (NMR), electrospray ionization time-of-flight mass spectrometry (ESI-TOF-MS), and temperature-dependent single crystal X-ray diffraction studies. Variable-temperature magnetic susceptibility measurements reveal the presence of an abrupt SCO behavior with a thermal hysteresis width of 4 K for Fe(L¹)₂. By clear contrast, Fe₄(L²)₄ undergoes a gradual spin transition behavior with enlarged thermal hysteresis width and higher spin transition temperature.