Proton Grease: An Acid Accelerated Molecular Rotor
作者:Brent E. Dial、Perry J. Pellechia、Mark D. Smith、Ken D. Shimizu
DOI:10.1021/ja2120184
日期:2012.2.29
A molecularrotor was designed that rotates 7 orders of magnitude faster upon protonation. The quinoline rotor is based on a rigid N-arylimide framework that displays restricted rotation due to steric interaction between the quinoline nitrogen and imide carbonyls. At rt (23 °C), the rotor rotates slowly (t(1/2) = 26 min, ΔG(‡) = 22.2 kcal/mol). However, upon addition of 3.5 equiv of acid the rotor rotates