Metalloporphyrin Encapsulation for Enhanced Conversion of CO to CH.

Electrochemical conversion of CO into valuable products is a promising approach. Efficient electrocatalysts are highly desirable but remain to be developed. Here, we proposed a molecular encapsulation strategy to enrich intermediates for facilitating electrochemical conversion of CO to CH.

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.

Iron(iii)-bipyridine incorporated metal-organic frameworks for photocatalytic reduction of CO with improved performance.

Metal-organic frameworks (MOFs) represent an emerging class of platforms to assemble single site photocatalysts for artificial photosynthesis. In this work, we report a new CO reduction photocatalyst (UiO-68-Fe-bpy) based on a robust Zr(iv)-MOF platform with incorporated Fe(bpy)Cl (bpy refers to the 4'-methyl-[2,2'-bipyridine] moiety) via amine-aldehyde condensation. We show that this hybrid catalyst can reduce CO to form CO under visible light illumination with excellent selectivity and enhanced activity with respect to its parent MOF and corresponding homogeneous counterpart.

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.

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.

Facet-dependent photocatalytic hydrogen production of metal-organic framework NH-MIL-125(Ti).

Facet-dependent catalytic activity of hard materials such as metals and metal oxides is well recognized in previous works. However, it has rarely been established for metal-organic frameworks (MOFs), possibly because the soft crystals of MOFs are conceptually different from the hard solids. In this work, the surface structure of the MOF NH-MIL-125(Ti) has been investigated by density functional theory (DFT) calculations for the first time.

Porous Metal-Organic Frameworks with Chelating Multiamine Sites for Selective Adsorption and Chemical Conversion of Carbon Dioxide.

A combination of carbon dioxide (CO) capture and chemical fixation in a one-step process is attractive for chemists and environmentalists. In this work, by incorporating chelating multiamine sites to enhance the binding affinity toward CO, two novel metal-organic frameworks (MOFs) [Zn(L)(2,6-NDC)(HO)]·1.5DMF·2HO (1) and [Cd(L)(2,6-NDC)]·1.

[Assessment of left ventricular diastolic function by pulsed Doppler tissue imaging in patients with type 2 diabetes mellitus].

Objective: To assess the value of pulsed Doppler tissue imaging (PW-DTI) in evaluating the left ventricular diastolic dysfunction (LVDD) in patients with type 2 diabetes mellitus (DM).

Methods: Seventy-seven type 2 diabetic patients and 43 healthy volunteers underwent PW-DTI and mitral inflow pulsed wave Doppler (MPWD). Six positions of the mitral annulus were measured by PW-DTI for early diastolic velocity (Em), end diastolic velocity (Am), Em/Am ratio.