A Photo‐Responsive Organogel Based on Pyrene‐Substituted Acylhydrazone Derivative. Issue 12 (23rd October 2017)

• Record Type: Journal Article
• Authors: Chai, Qing; Wei, Jue; Bai, Binglian; Wang, Haitao; Li, Min
• Is Part Of: Chinese journal of chemistry. Volume 35:Issue 12(2017)
• Page Start: 1829
• Page End: 1834
• Publication Date: 2017-10-23
• Subjects: pyrene -- organogel -- fluorescence -- fiber -- photoisomerization; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/cjoc.201700388
• Languages: English
• ISSNs: 1001-604X

Abstract

Abstract: A new simple pyrene‐substituted acylhydrazone derivative, 4‐(3, 4‐dioctyloxy) phenyl‐1‐pyrene acylhydrazone (PAH‐8), was designed and synthesized. The PAH‐8 can form thermo‐reversible organogel in DMSO, and shows gelation‐induced enhanced fluorescence emission. Xerogel exhibits ribbon‐like fibrous aggregates with widths of 0.5‐1 μm. The PAH‐8 organogel indicates photo‐responsive behaviors due to the trans‐cis isomerizations of ‐C=N‐ bond upon exposure to visible or UV light. Upon visible light irradiation, the partial trans‐cis isomerization of the ‐C=N‐ bond causes the fiber morphology to disappear, resulting in gel‐sol transition, whereas the PAH‐8 organogel exhibits few photoisomerizations from trans to cis transition without breakage of the gel state upon UV light irradiation. Abstract : The organogel based on a pyrene‐substituted acylhydrazone derivative exhibited gelation‐induced enhanced fluorescence emission and this organogel exhibited photoresponsive behaviors due to the trans‐cis isomerizations of ‐C=N‐ bond upon exposure to visible or UV light.