Environmentally\nStable Reversible Cavitand Molecular\nSwitches Based on the Excimer of Perylene

Environmentally stable novel flexible bisperylene resorcin[4]arene\nmolecular switch cavitand B and the corresponding rigid cavitand A\nwere synthesized and a single crystal was obtained. Spectroscopic\nanalysis revealed the formation of an excimer of perylene within the\ncavitand. The presence of flexible chains in cavitand B confers a\nhigh degree of environmental stability, rendering its fluorescence\nunaffected by external factors such as pH and temperature variations.\nIn contrast, the rigid cavitand A exhibits heightened sensitivity\nto changes in environmental conditions.