Unique Piezochromic Fluorescence Behavior of Dicyanodistyrylbenzene Based Donor–Acceptor–Donor Triad: Mechanically Controlled Photo‐Induced Electron Transfer (eT) in Molecular Assemblies

• DOI: 10.1002/adma.201202409
• Publication Date: 2012-08-07T08:55:31Z
• Authors: Min Sang Kwon; Johannes Gierschner; Seong‐Jun Yoon; Soo Young Park
• Keywords: Calorimetry, Differential Scanning; Carbazoles; Electrons; self assembly; 01 natural sciences; 0104 chemical sciences; Electron Transport; photo-induced electron transfer; donor-acceptor; Nitriles; Stilbenes; piezochromism; Spectrophotometry, Ultraviolet; Fluorescent Dyes

A novel donor-acceptor-donor triad that exhibits fluorescence on-off switching with high contrast ratio (ca. 10(3) ) in response to a mechanical stimulus in the solid state is reported. This system provides a very unique example of high-contrast fluorescence switching that is driven by a mechanical-force-controlled photo-induced electron transfer (eT) in molecular assemblies.