Topology-Optimized 3D Metalloporphyrin Covalent Organic Framework for Photocatalytic CO Fixation.

Three-dimensional (3D) covalent organic frameworks (COFs) represent promising photocatalytic platforms with accessible active sites, yet their development faces challenges in terms of structural diversity and synthetic complexity. Herein, a robust 3D metalloporphyrin COF with topology and 2-fold interpenetration is achieved by using high-connectivity metalloporphyrin, and different metal centers within the porphyrin units of 3D COFs lead to intriguing structural variations. Particularly, the 3D cobalt-porphyrin-based COF achieves efficient photocatalytic CO-to-CO conversion with a rate of 21 251.

An improved typhoon simulation method based on Latin hypercube sampling method.

In order to further improve the prediction accuracy of typhoon simulation method for extreme wind speed in typhoon prone areas, an improved typhoon simulation method is proposed by introducing the Latin hypercube sampling method into the traditional typhoon simulation method. In this paper, the improved typhoon simulation method is first given a detailed introduction. Then, this method is applied to the prediction of extreme wind speeds under various return periods in Hong Kong.