Sensing Properties of NH-MIL-101 Series for Specific Amino Acids via Turn-On Fluorescence.

Metal-organic frameworks (MOFs) have been demonstrated to be desired candidates for sensing definite species owing to their tunable composition, framework structure and functionality. In this work, the NH-MIL-101 series was utilized for sensing specific amino acids. The results show that cysteine (Cys) can significantly enhance the fluorescence emission of NH-MIL-101-Fe suspended in water, while NH-MIL-101-Al exhibits the ability to sense lysine (Lys), arginine (Arg) and histidine (His) in aqueous media via turn-on fluorescence emission.

An iron-nitrogen doped carbon and CdS hybrid catalytic system for efficient CO photochemical reduction.

Iron porphyrin and carbon black (CB) were utilized to fabricate an iron-nitrogen doped carbon (Fe-N-C) catalyst to create a new heterogeneous catalytic system with CdS to drive CO2 reduction to CO under UV/vis light (AM 1.5G) irradiation. The system delivers a high CO production yield of 111 mmol gcat-1 and a large turnover number (TON) of 1.

Coordination polymers with a pyridyl-salen ligand for photocatalytic carbon dioxide reduction.

A new ligand HL with pyridine and salen moieties and its coordination polymers (CPs) [Mn(L)Cl]·DMF (1) and [Fe(L)Cl]·DMF (2) were synthesized and their photocatalytic activity for the conversion of CO into CO under visible-light irradiation was investigated. This is the first instance of pyridyl-salen-ligand based CPs for photocatalyzing CO reduction.

Cucurbit[7]uril-Based Metal-Organic Rotaxane Framework for Dual-Capture of Molecular Iodine and Cationic Potassium Ion.

Metal-organic rotaxane frameworks (MORFs) attracted much attention in the past years for construction of intelligent functional materials. Herein, a one-pot synthesis is reported of a three-dimensional (3D) cucurbit[7]uril (Q[7])-based MORF under hydrothermal conditions, namely Q[7]-MORF-1, formed by encapsulating the anionic benzoate moieties of the tricarboxylate ligand into the cavity of Q[7]. Furthermore, Q[7]-MORF-1 shows dual-capture capacity for iodine and K selectively among the alkali metal ions.

Solvent-Free Photoreduction of CO to CO Catalyzed by Fe-MOFs with Superior Selectivity.

It is deemed as a desired approach to utilize solar energy for the conversion of CO into valuable products, and the majority of the MOFs-based photocatalytic reductions of CO have focused on formic acid (HCOOH) production with an organic solvent as the reaction medium. Herein, we report a solvent-free reaction route for the photoreduction of CO catalyzed by Fe-MOFs, namely, NH-MIL-53(Fe) [(Fe(OH)(NH-BDC)]•G, NH-MIL-88B(Fe) [FeO(HO)(NH-BDC)]Cl•G, and NH-MIL-101(Fe) [FeO(HO)(NH-BDC)]Cl•G (NH-BDC = 2-aminoterephthalic acid; G = guest and/or solvent molecules). Compared with the orthodox reaction route, the present out-of-the-way photocatalytic reduction of CO with superior selectivity to CO occurs at the gas-solid interface.

Different functional group modified zirconium frameworks for the photocatalytic reduction of carbon dioxide.

Conversion of carbon dioxide (CO) into useful chemicals is an important and urgent task from the energy and environment perspective. Herein, through a post-synthetic modification (PSM) approach, we synthesized three new metal-organic frameworks (MOFs) UiO-68-PSMs with different functional groups, namely, UiO-68-F, UiO-68-CH and UiO-68-OCH, for the photocatalytic reduction of CO. By introducing electron-withdrawing and electron-donating groups, UiO-68-PSMs showed different performance for the selective photocatalytic reduction of CO to CO because of change in charge separation and band gap of UiO caused by the presence of different functional groups.