Stepwise structure evolution from 2D cluster-based frameworks to silver(I) clusters.

A pair of 2D chiral frameworks, R-Ag5-1 and S-Ag5-1, with orange fluorescence were successfully synthesized. They were transformed to a thermodynamically favored denser stacking, R-Ag5-3 and S-Ag5-3, accompanied by a change in the luminescence and activating the CPL signal. The capture and structural determination of the intermediates (R-Ag5-2 and S-Ag5-2) reveal that the coordination instability of Na ions is the main cause of this transition.

Integrating Single Atoms with Different Microenvironments into One Porous Organic Polymer for Efficient Photocatalytic CO Reduction.

The precise identification of single-atom catalysts (SACs) activity and boosting their efficiency toward CO conversion is imperative yet quite challenging. Herein, for the first time a series of porous organic polymers is designed and prepared simultaneously, containing well-defined M-N and M-N O single-atom sites. Such a strategy not only offers multiactive sites to promote the catalytic efficiency but also provides a more direct chance to identify the metal center activity.

Clinical efficacy analysis of different therapeutic methods in patients with cesarean scar pregnancy.

Objective: The purpose of this study was to analyze the clinical efficacy of five therapeutic strategies in patients with CSP.

Materials And Methods: A total of 135 CSP patients were included and divided into five groups based on the treatment they received, including transvaginal resection (Group A), laparoscopic resection (Group B), uterine arterial embolization (UAE) combined with hysteroscopic curettage (Group C), UAE combined with uterine curettage (Group D), and hysteroscopic curettage (Group E). To investigate the clinical efficacy of these strategies, intraoperative bleeding, serum β-hCG levels and recovery time, menstruation recovery time, hormone levels at 1 month after treatment.

Ozone Decomposition by a Manganese-Organic Framework over the Entire Humidity Range.

Ground-level ozone (O) is one of the main airborne pollutants detrimental to human health and ecosystems. However, the designed synthesis of high-performance O elimination catalysts suitable for broadly variable air compositions, especially a variable water vapor content, remains daunting. Herein, we report a new manganese-based metal organic framework, [Mn(μ-OH)(TTPE)(HO)]·2HO (HTTPE = 1,1,2,2-tetrakis(4-(2-tetrazol-5-yl)phenyl) ethane), denoted as ZZU-281.