Metal−organic frameworks (MOFs) show a distinctive pre-eminence over other heterogeneous systems for adsorption of carbon dioxide (CO 2 ) gas and fluorescence detection of water contaminating ions, where integration of both these attributes along with enhancement of pore functionality and water stability is crucial for potential applications related to environmental remediation. Pore functionalization has been achieved in a 2-fold interpenetrated, mixed-ligand Cd(II)-frameworkResearch Institute) by utilizing a bifunctional ligand HL. The bpypillared framework, containing diverse Cd(II) nodes, optimum sized voids, and free N-atom affixed one-dimensional porous channels, shows notable structural robustness in diverse organic solvents and water. In spite of a negligible surface area, the activated MOF (5a) exhibits good CO 2 uptake and highly selective CO 2 adsorption over N 2 (259.94) and CH 4 (14.34) alongside minor loss during multiple CO 2 adsorption−desorption cycles. Luminescence studies demonstrate extremely selective and ultrafast sensing of Fe 3+ ions in the aqueous phase with notable quenching (1.13 × 10 4 M −1 ) as well as an impressive 98 ppb limit of detection (LOD). Importantly, Fe 3+ detection is exclusively retained under simulated physiological conditions. The framework further serves as a quick-responsive scaffold for toxic CrO 4 2− and Cr 2 O 7 2− anions, where individual quenching constants (CrO 4 2− : 1.73 × 10 4 M −1 ; Cr 2 O 7 2− : 5.42 × 10 4 M −1 ) and LOD values (CrO 4 2− : 280 ppb; Cr 2 O 7 2− : 320 ppb) rank among the best sensory MOFs for aqueous phase detection of Cr(VI) species. It is imperative to stress vivid monitoring of all these aqueous pollutants by a handy paper-strip method, besides outstanding applicability of 5a toward their recyclable detection. Mechanism of selective quenching is comprehensively investigated in light of the absorption of the excitation/emission energy of the host framework by an individual studied analyte.

Combining the merits of structural diversity, and purposeful implantation of task-specific functionalities, metal-organic frameworks (MOFs) instigate targeted reactive oxygen species (ROS) scavenging and concurrent detoxification via self-calibrated emission modulation. Then...

Metal−organic frameworks (MOFs) not only combine globally demanded renewable energy generation and environmental remediation onto a single platform but also rationalize structure−performance synergies to devise smarter materials with remarkable performance. The robust and non-interpenetrated cationic MOF exemplifies a unique bifunctional scaffold for the efficient electrochemical oxygen evolution reaction (OER) and ultrasensitive monitoring of biohazards. The microporous framework containing Brønsted acidfunctionalized [Co 2 (μ 2 -OH)(CO 2 ) 2 ] secondary building units (SBUs) exhibits remarkable OER performance in 1 M KOH, requiring 410 mV overpotential to obtain 10 mA cm −2 anodic current density, and a low Tafel slope of 55 mV/dec with 93.1% Faradaic efficiency. Apart from the high turnover frequency and electrochemically assessable surface area, steady OER performance over 500 cycles under potentiodynamic and potentiostatic conditions result in long-term catalyst durability. The highly emissive attribute from nitrogen-rich fluorescent struts benefits the MOF in recyclable and selective fluoro-detection of three biothiols (L-cysteine, homocysteine, and glutathione) in water with a fast response time. In addition to colorimetric monitoring in the solid and solution phases, control experiments validate size-exclusive biothiol speciation through molecular-dimension-mediated pore diffusion. The role of SBUs in the OER mechanism is detailed from density functional theory-derived free energy analysis, which also validates the importance of accessible N-sites in sensing via portraying framework−analyte supramolecular interactions.

Living ages of artificial catalytic machinery leverages improvising purpose-driven pore functionality engineering in metal-organic frameworks (MOFs) to pursuit alternative renewable energy source and biomimetic hydrogen-bond-donating (HBD) organo-catalysis. Though challenging, systematic...

The dire need of reducing atmospheric carbon dioxide (CO2) concentration has captivated worldwide attention to capture this greenhouse gas and convert to useful chemicals. Nevertheless, it is still tough to...