We report a porous thiazolo[5,4-d]thiazole-bridged porphyrin organic framework, Por-TzTz-POF, with promising nonlinear optical (NLO) activity.

A simple, swift mechanochemical approach for MOF synthesis using kitchen grinder has been developed for size selective dye adsorption.

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Hydrogen (H2), the next-generation green fuel, can be obtained by the catalytic splitting of water using solar and electrochemical methods and a combination of both (photoelectrochemical). Among the various porous catalytic water reduction systems developed, covalent organic frameworks (COFs) based systems are emerging in recent times due to their structural ordering and facile tunability, high thermo-chemical stability, and permanent porosity. This review provides a detailed summary and analysis of COF-based photo-, electro-, and photoelectrochemical hydrogen evolution systems. Uniquely, it includes the journey from precious noble metal to earth-abundant molecular cocatalysts for the generation of H2 and their synergetic interaction with COFs. Moreover, the focus is on outlining the core concept of heterogeneous catalytic H2 evolution, measurement techniques, photophysical and physicochemical insights, and the relationship among key components of the overall process. Finally, the advantages and pitfalls of COFs as H2 evolution systems and the design principles for optimal catalytic efficiency are discussed. A dedicated outlook section is presented at the end to benefit researchers for future developments in this emerging field.