Abstract
AbstractSelf‐assembling dendrons sterically disfavor the cisoid conformation through which 6π‐electrocyclization proceeds in cis‐polyarylacetylenes. Through the same mechanism, selected self‐organizable dendronized helical cis‐polyphenylacetylenes (cis‐PPAs) undergo an unprecedented thermally induced cisoid‐to‐transoid conformational isomerism in bulk. The motion of helix (un)winding can be converted to unidirectional motion in self‐organizable dendronized cis‐PPAs. By eliminating 6π‐electrocyclization, nanomechanical actuators capable of lifting a US dime have been prepared from self‐organizable dendronized cis‐PPAs.magnified image
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