An Unusual Stacking Transformation in Liquid‐Crystalline Columnar Assemblies of Clicked Molecular Propellers with Tunable Light Emissions. Issue 40 (14th August 2014)

• Record Type: Journal Article
• Authors: Kim, Jinhee; Cho, Sung; Cho, Byoung‐Ki
• Is Part Of: Chemistry. Volume 20:Issue 40(2014)
• Page Start: 12734
• Page End: 12739
• Publication Date: 2014-08-14
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.201403297
• Languages: English
• ISSNs: 0947-6539

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>The columnar liquid‐crystalline (LC) and fluorescence properties of three‐dimensional molecular propellers based on tetraphenylethylene is reported. X‐ray scattering studies reveal an unusual transition from a rectangular (Col_rec) to a hexagonal columnar (Col_hex) phase. In contrast to second‐order intercolumnar transitions based on a common tilt mechanism, the transition is first order and involves an unprecedented zigzag stacking of aromatic propellers in the Col_rec phase. A sudden change in emission color from sky blue to green occurs rapidly and reversibly at this transition, which is due to the planarization of the propeller mesogen.</p> </abstract>