Stoichiometry-Regulated Synthesis of Three Adenine-Based Coordination Polymers for Catalytic Excellence through the Synergistic Amalgamation of Coordinative Unsaturation and Lewis Basic Sites.

Nucleobase adenine is a promising candidate for synthesizing fascinating coordination polymers (CPs) due to the presence of five potential metal-ion binding centers. In recent years, CPs have emerged as promising Lewis acid-base centers containing heterogeneous catalysts for a wide range of organic transformations. However, the crucial role of stoichiometric regulations of the starting materials and their consequential impact on catalytic performance are rarely studied.

Short insemination during conventional in vitro fertilization increases embryo quality.

Aim: To compare clinical outcomes using short and long co-incubation protocols in sibling oocytes based on embryo morphokinetic outcomes measured by time-lapse incubator with stratification based on a woman's age and sperm quality.

Design: Our study included 72 cycles with >6 oocytes retrieved. Sibling oocytes were distributed for two parallel protocols: short (3 h; n = 421) or long (16-20 h; n = 434) insemination, using the same amount of spermatozoa from the same prepared sample.

Superior Electrochemical Water Splitting and Energy-Storage Performances of In Situ Fabricated Charge-Separated Metal Organophosphonate Single Crystals.

The design and exploration of advanced materials as a durable multifunctional electrocatalyst toward sustainable energy generation and storage development is the most perdurable challenge in the domain of renewable energy research. Herein, a facile in situ solvothermal approach has been adopted to prepare a methylviologen-regulated crystalline metal phosphonate compound, [CHN][Ni(CHN)(Hhedp)]•6HO (), (Hhedp = 1-hydroxyethane 1,1-diphosphonic acid) and well characterized by several techniques. The as-prepared displays excellent bifunctional electrocatalytic activity with dynamic stability toward oxygen evolution reaction (η = 288 mV) and hydrogen evolution reaction (η = 228 mV) in alkaline (1.

Intrinsic Specific Activity Enhancement for Bifunctional Electrocatalytic Activity toward Oxygen and Hydrogen Evolution Reactions via Structural Modification of Nickel Organophosphonates.

A comprehensive knowledge of the structure-activity relationship of the framework material is decisive to develop efficient multifunctional electrocatalysts. In this regard, two different metal organophosphonate compounds, [Ni(Hhedp)]·4HO () and [Ni(Hhedp)(CHN)]·6HO () have been isolated through one-pot hydrothermal strategy by using Hhedp (1-hydroxyethane 1,1-diphosphonic acid) and N-donor auxiliary ligand (pyrazine; CHN). The structures of synthesized materials have been established through single-crystal X-ray diffraction studies, which confirm that compound formed a one-dimensional molecular chain structure, while compound exhibited a three-dimensional extended structure.