Environmentally Stable Reversible Cavitand Molecular Switches Based on the Excimer of Perylene.

Environmentally stable novel flexible bisperylene resorcin[4]arene molecular switch cavitand B and the corresponding rigid cavitand A were synthesized and a single crystal was obtained. Spectroscopic analysis revealed the formation of an excimer of perylene within the cavitand. The presence of flexible chains in cavitand B confers a high degree of environmental stability, rendering its fluorescence unaffected by external factors such as pH and temperature variations.

A H@CH NMR probe for sensitively detecting the supramolecular interactions between a molecular tweezer and C.

Herein, we firstly utilized H@C to monitor the supramolecular interaction between a pH-driven resorcin[4]arene molecular tweezer and C with a notable H NMR chemical shift change ( 0.34 ppm). This work provides a new strategy for detecting weak or complex supramolecular interactions.

Integrated Development of Artificial Intelligence and Economic Management.

The world economy is developing rapidly. Behind the rapid development, the management of economic regions is very important. In the process of economic management, the government plays the role of macrocontrol and is responsible for the management of various economic affairs and social and economic services.

Chain Length Modulated Dimerization and Cyclization of Terminal Thienyl-Blocked Oligopyrranes.

Oxidation of thienyl-blocked bilane and pentapyrrane afforded chain length dependent products of the symmetric dimer and the thienyloligopyrrin-appended pentaphyrin analogue , respectively, with the latter formed by simultaneous dimerization and cyclization. Coordination of and with Cu(II) afforded di- and monometallic complexes and , respectively. These compounds exhibit distinct NIR absorption, with the absorption tail of extended to ca.