No abstract

A practical and efficient method was developed for the synthesis of propargylamines in a one-pot procedure from aldehydes, amines, and alkynes by using CuI as catalyst and succinic acid as additive. By using this protocol, a wide range of propargylamines was obtained in high yields.

The development of flexible and adaptable multifunctional sensing systems for human–machine interaction, especially for animal voice‐emotion identification, is highly desirable yet quite challenging. Herein, a multifunctional triboelectric nanogenerator (TENG) based on ordered hierarchical microhump arrays is proposed and fabricated by template‐assisted electrospinning with a facile, low‐cost, and expandable manufacturing process. Performances of a single‐electrode TENG based on the patterned nanofiber films with microhump arrays (NFM‐TENG) are studied in detail by varying mesh number of the template. Electric field structure of the collector is altered by pore sizes, wire diameters, and protrusions of the receiving templates subjected to different mesh numbers, generating different degrees of microhump arrays on the surface of the nanofiber film. NFM‐TENG demonstrates high sensitivity (15.94 mV Pa−1), fast response and recovery time (76 and 58 ms), a large power density of 122 mW m−2, and excellent ability of structural retention. Integrated with four functions of energy harvesting, pressure sensing, human physiological sensing, and animal voice‐emotion identification, NFM‐TENG achieves real‐time monitoring of human physiological, motion, handwriting, and animal voice‐emotion signals without an external power supply. This study shows significant application strategies for self‐powered human–machine interaction devices, novel animal voice‐emotion identification, biodiversity conservation, and so on.

Amines Q 0120Carbene Adduct of Cyclopalladated Ferrocenylimine as an Efficient Catalyst for the Amination of Aryl Chlorides. -A new ferrocenylimine-containing Pd-imidazolylidene catalyst is prepared and successfully applied in the arylation of primary and secondary aliphatic and aromatic amines with aryl chlorides. The N-arylation reaction is influenced by steric effects while electronic effects play a minor role. -(LI, J.; CUI, M.; YU, A.; WU*, Y.; J.

Woodcut New Year pictures are the artistic creation of Chinese folks, bearing regional cultures in different areas and forming a variety of artistic forms. But nowadays, under the the environment of the collision of regional culture and economic market, its expansion faces dilema of development. On the one hand, there is a gap between folk art and modern aesthetics. On the other hand, it faces the choice between traditional craftsmanship and modern technology. In such a complex environment, how to determine the development point of woodcut New Year pictures is the most important. Based on the previous research on woodcut New Year pictures in various places, the article constructs a comprehensive development value evaluation index system. Taking three places - Taohuawu, Yangjiabu and Fengxiang as examples, the paper evaluates the woodcut New Year pictures by using fuzzy analytic hierarchy process, expecting to pertinently put forward a new perspective and method for the development of woodblock New Year pictures.