Visible-Light-Promoted Direct C3-H Cyanomethylation of 2H-Indazoles

Abstract

The efficient visible-light-promoted cyanomethylation of 2H-indazoles in the presence of Ir(ppy)3 as the photocatalyst and bromoacetonitrile as the cyanomethyl radical source was achieved under mild conditions, providing a series of C3-cyanomethylated derivatives in good yields.

Impact Resistance of 3D Cellular Structures for Protective Clothing

“…To compare the impact resistance performance of cellular structure pads with conventional materials found in comparable applications, the thickness of cellular structure pads was controlled to 5.36 mm, in line with conventional paddings material for protective assemblies, which are usually thicker than 5 mm. [2,5] Wall thickness of unit cells (strut diameter) was also kept constant at 0.4 mm. The previous study [14] used a minimum strut diameter of 0.6 mm for 3D-printed cellular structures.…”

“…Although impact protection materials have been extensively used in sporting goods, medical and military equipment and industrial protection, the existing literature focuses on their protection effectiveness, and hence wear discomfort still remains a major unsolved problem with protective clothing and equipment. [ 2,3 ]…”

“…Although impact protection materials have been extensively used in sporting goods, medical and military equipment and industrial protection, the existing literature focuses on their protection effectiveness, and hence wear discomfort still remains a major unsolved problem with protective clothing and equipment. [2,3] Impact protective equipment and clothing are generally made up of padding materials embedded in specially designed clothing for particular requirements. [3] Foams, in the form of padding, have been widely used as energy-absorbing materials.…”