A metal-organic framework (MOF) with pressure-responsive photoluminescence was designed by installation of mixed organic linkers into different positions in the coordination space. Anisotropic and stepwise piezofluorochromism was visualized by the MOF single crystals, providing potential for display, barcoding, and sensing fields in photophysical devices.

Titanium metal-organic frameworks (Ti-MOFs), as an appealing type of artificial photocatalyst, have shown great potential in the field of solar energy conversion due to their well-studied photoredox activity (similar to TiO 2 )a nd good optical responsiveness of linkers,which serve as the antenna to absorb visible-light. Although mucheffort has been dedicated to developing Ti-MOFs with high photocatalytic activity,their solar energy conversion performances are still poor.Herein, we have implemented ac ovalent-integration strategy to construct as eries of multivariate Ti-MOF/COF hybrid materials PdTCPP&PCN-415(NH 2 )/TpPa( composites 1, 2, and 3), featuring excellent visible-light utilization, asuitable band gap, and high surface area for photocatalytic H 2 production. Notably,t he resulting composites demonstrated remarkably enhanced visible-light-driven photocatalytic H 2 evolution performance,e specially for the composite 2w ith am aximum H 2 evolution rate of 13.98 mmol g À1 h À1 (turnover frequency (TOF) = 227 h À1 ), which is muchh igher than that of PdTCPP&PCN-415(NH 2 )( 0.21 mmol g À1 h À1 )a nd TpPa (6.51 mmol g À1 h À1 ). Our work therebys uggests an ew approach to highly efficient photocatalysts for H 2 evolution and beyond.

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Defects in perovskite are key factors in limiting the photovoltaic performance and stability of perovskite solar cells (PSCs). Generally, choline halide (ChX) can effectively passivate defects by binding with charged point defects of perovskite. However, we verified that ChI can react with CsPbI3 to form a novel crystal phase of one‐dimensional (1D) ChPbI3, which constructs 1D/3D heterostructure with 3D CsPbI3, passivating the defects of CsPbI3 more effectively and then resulting in significantly improved photoluminescence lifetime from 20.2 ns to 49.4 ns. Moreover, the outstanding chemical inertness of 1D ChPbI3 and the repair of undesired δ‐CsPbI3 deficiency during its formation process can significantly enhance the stability of CsPbI3 film. Benefiting from 1D/3D heterostructure, CsPbI3 carbon‐based PSCs (C‐PSCs) delivered a champion efficiency of 18.05 % and a new certified record of 17.8 % in hole transport material (HTM)‐free inorganic C‐PSCs.

Titanium metal–organic frameworks (Ti‐MOFs), as an appealing type of artificial photocatalyst, have shown great potential in the field of solar energy conversion due to their well‐studied photoredox activity (similar to TiO2) and good optical responsiveness of linkers, which serve as the antenna to absorb visible‐light. Although much effort has been dedicated to developing Ti‐MOFs with high photocatalytic activity, their solar energy conversion performances are still poor. Herein, we have implemented a covalent‐integration strategy to construct a series of multivariate Ti‐MOF/COF hybrid materials PdTCPP⊂PCN‐415(NH2)/TpPa (composites 1, 2, and 3), featuring excellent visible‐light utilization, a suitable band gap, and high surface area for photocatalytic H2 production. Notably, the resulting composites demonstrated remarkably enhanced visible‐light‐driven photocatalytic H2 evolution performance, especially for the composite 2 with a maximum H2 evolution rate of 13.98 mmol g−1 h−1 (turnover frequency (TOF)=227 h−1), which is much higher than that of PdTCPP⊂PCN‐415(NH2) (0.21 mmol g−1 h−1) and TpPa (6.51 mmol g−1 h−1). Our work thereby suggests a new approach to highly efficient photocatalysts for H2 evolution and beyond.