Molecules that assemble by sound: an application to the instant gelation of stable organic fluids.
The first molecule that assembles by ultrasound is described. An association-inert dinuclear Pd complex, anti-1a, which is stabilized by intramolecular pi-stacking interactions, gelatinizes a variety of organic solvents instantly upon brief presonication for a few seconds. This is the first quick, positive, and reversible method for the remote switching of stable sol-gel phases. Uniquely, the rate can be precisely controlled over the range between "no gelation" and "instant gelation" simply by tuning the sonication time.
Department of Chemistry, Graduate School of Engineering Science, Osaka University, PRESTO, Japan. naota@chem.es.osaka-u.ac.jp
Takeshi
T
Naota
Hiroshi
H
Koori