Carboxylic acids are widely available from both biomass and fossil sources on the earth. In comparison with multifunctional carboxylic acid containing chemicals those have been comprehensively used as building block...

Defect‐free alternating conjugated polymers were produced by exploring palladium‐catalyzed Stille polymerization at room temperature. The selected copolymers demonstrated no homocoupling defects and superior charge transport properties, thus paving the road for the development of plastic electronics. Details of this study are reported by Qinqin Shi, Hui Huang, and co‐workers in their Research Article (e202115969).

Sexual dimorphism is reviewed and described in adult skulls of Sciences, 142 Xi-Zhi-Men-Wai Street, P.O. Box 643, Beijing 100044, China; Tao Deng[dengtao@ivpp.ac.cn], Sukuan Hou [housukuan@gmail.com], Qinqin Shi [shiqqin@hotmail.com], and Libo Pang [libopang2002@yahoo.com.cn