In Situ Integration of Metallic Catalytic Sites and Photosensitive Centers within Covalent Organic Frameworks for the Enhanced Photocatalytic Reduction of CO.

Covalent organic frameworks (COFs) are a promising platform for heterogeneous photocatalysis due to their stability and design diversity, but their potential is often restricted by unmanageable targeted excitation and charge transfer. Herein, a bimetallic COF integrating photosensitizers and catalytic sites is designed to facilitate locally ultrafast charge transfer, aiming to improve the photocatalytic reduction of CO. The strategy uses a "one-pot" method to synthesize the bimetallic COF (termed PBCOF) through in situ Schiff-base condensation of Pyrene with MBpy (M = Ru, Re) units.

Heavy-Atom-Free Covalent Organic Frameworks for Organic Room-Temperature Phosphorescence via Förster and Dexter Energy Transfer Mechanism.

Covalent organic frameworks (COFs), with their accessible nanoscale porosity, selectable building blocks, and precisely engineered topology, offer unique benefits in the design of room-temperature phosphorescent (RTP) materials. However, their potential has been limited by phosphorescence quenching caused by interlayer π-π stacking interactions. This paper presents a novel strategy to enhance RTP in heavy-atom-free COFs by employing a donor-acceptor (D-A) system that leverages the Förster resonance energy transfer (FRET) and Dexter energy transfer (DET) mechanisms.

Constructing cuprous oxide-modified zinc tetraphenylporphyrin ultrathin nanosheets heterojunction for enhanced photocatalytic carbon dioxide reduction to methane.

The application of supermolecular naonostructures in the photocatalytic carbon dioxide reduction reaction (CORR) has attracted increasing attentions. However, it still faces significant challenges, such as low selectivity for multi-electron products and poor stability. Here, the cuprous oxide (CuO)-modified zinc tetraphenylporphyrin ultrathin nanosheets (ZnTPP NSs) are successfully constructed through the aqueous chemical reaction.

Construction of Cobalt Porphyrin-Modified CuO Nanowire Array as a Tandem Electrocatalyst for Enhanced CO Reduction to C Products.

Here, the molecule-modified Cu-based array is first constructed as the self-supporting tandem catalyst for electrocatalytic CO reduction reaction (CORR) to C products. The modification of cuprous oxide nanowire array on copper mesh (CuO@CM) with cobalt(II) tetraphenylporphyrin (CoTPP) molecules is achieved via a simple liquid phase method. The systematical characterizations confirm that the formation of axial coordinated Co-O-Cu bond between CuO and CoTPP can significantly promote the dispersion of CoTPP molecules on CuO and the electrical properties of CoTPP-CuO@CM heterojunction array.

Processing mechanism synergizing surface and intercalation pseudocapacitance engineering fast-charging Li-based anode materials.

Pseudocapacitive material can achieve rapid charge and discharge response. In this study, a vanadium-based conductive network hydrate (NaMg)VO·0.98HO (NMVO) was designed.

Highly efficient electrochemical reforming of CH/CO in a solid oxide electrolyser.

Reforming CH into syngas using CO remains a fundamental challenge due to carbon deposition and nanocatalyst instability. We, for the first time, demonstrate highly efficient electrochemical reforming of CH/CO to produce syngas in a solid oxide electrolyser with CO electrolysis in the cathode and CH oxidation in the anode. In situ exsolution of an anchored metal/oxide interface on perovskite electrode delivers remarkably enhanced coking resistance and catalyst stability.

Sensitive fluorescence biosensor for folate receptor based on terminal protection of small-molecule-linked DNA.

Based on the specific folic acid-folate receptor (FA-FR) interaction, macromolecular FR can bind with FA-linked DNA-small molecule chimeras, which can prevent enzymolysis by exonuclease III (Exo III), enabling a novel fluorescence biosensor for FR to be developed using quinaldine red as a G-quadruplex-binding probe.

Logic gates for multiplexed analysis of Hg2+ and Ag+.

The design of devices with multiple functions, simple handling procedures and sufficient sensitivity has drawn great interests in the field of analysis. Metal-nucleotide based pairs, such as T-Hg(2+)-T and C-Ag(+)-C complexes accompanied by SYBR Green I (SG), are used to selectively bind duplex-strand DNA by observing a bright fluorescence signal in this work, thus yielding a simple method for the rapid detection of Hg(2+) and Ag(+) without a complex labeling process. Based on this principle, 'OR' and 'AND' logic gates for the multiplexed analysis of Hg(2+) and Ag(+) were developed, and their practical application for the detection of Hg(2+) and Ag(+) in drinking water was reported.