An anocage coupling effect from ar edoxR u II -Pd II metal-organic cage is demonstrated for efficient photochemical H 2 production by virtue of redox-guest modulation of the photo-induced electron transfer (PET) process. Through coupling with photoredox cycle of MOC-16, tetrathiafulvalene (TTF) guests act as electron relaym ediator to improve the overall electron transfer efficiency in the hostguest system in al ong-time scale,l eading to significant promotion of visible-light driven H 2 evolution. By contrast, the presence of larger TTF-derivatives in bulk solution without host-guest interactions results in interference with PET process of MOC-16, leading to inefficient H 2 evolution. Suchi nteraction provides an example to understand the interplay between the redox-active nanocage and guest for optimization of redox events and photocatalytic activities in ac onfined chemical nanoenvironment.

Among semiconductor photocatalysts, graphite carbon nitride (g-C 3 N 4 ) has caused great concern in terms of water splitting. Here, we prepared ultrathin g-C 3 N 4 nanosheets with high photocatalytic activity by recrystallization of urea from N,Ndimethylformamide (DMF) to form a hydrogen-bonding network (named as UDF) and then utilized the as-prepared complex for the synthesis of carbon nitride. Single-crystal Xray diffraction showed that urea and DMF form a 3:1 solvate in the UDF precursor, which manifests an extended three-dimensional hydrogen-bonding network. Then onestep thermal polycondensation of the UDF yields a nanosheet morphology with a reduced thickness of 4.0 nm, an enlarged surface area, and improved optical absorption, which results in a high rate of photocatalytic hydrogen evolution (2.5 × 10 −4 mol h −1 ) under the irradiation of visible light. It is foreseen that the facile method herein provides an alternative research approach for the synthesis of carbon nitride materials with versatile morphologies and structures for solar energy conversion.

Soluble covalent organic cages (COCs) were designed to comprise cryptand inner cavities and multiple metal-chelating sites on windows. The porous liquid formed by well-dispersed COCs in solution proves to be an excellent stabilizer for ultrafine palladium nanoparticles with a critical size of 1–3 nm using NaBH4 or methanol as a reductant. When transferring palladium nanoparticles stabilized in the porous liquid of COCs onto carbon nitride (g-C3N4), an efficient heterogeneous photocatalyst could be obtained to possess high catalytic activity for hydrogen evolution from water with long-term durability. This provides prospects for the application of porous liquids in various fields by combining advantages of homogeneous and heterogeneous attributes together.

A new luminescent Eu-MOF from an amino-group modified tetracarboxylic acid ligand was designed, which could perform as an efficient pH acidity and Cd2+ PL sensor and CO2 selector.

A nanocage coupling effect from a redox RuII‐PdII metal–organic cage (MOC‐16) is demonstrated for efficient photochemical H2 production by virtue of redox–guest modulation of the photo‐induced electron transfer (PET) process. Through coupling with photoredox cycle of MOC‐16, tetrathiafulvalene (TTF) guests act as electron relay mediator to improve the overall electron transfer efficiency in the host–guest system in a long‐time scale, leading to significant promotion of visible‐light driven H2 evolution. By contrast, the presence of larger TTF‐derivatives in bulk solution without host–guest interactions results in interference with PET process of MOC‐16, leading to inefficient H2 evolution. Such interaction provides an example to understand the interplay between the redox‐active nanocage and guest for optimization of redox events and photocatalytic activities in a confined chemical nanoenvironment.