Photoisomerization and Light-Driven Fluorescence Enhancement of Azobenzene Derivatives

Han, Mina; Norikane, Yasuo

doi:10.1002/9781118735183.ch09

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Fluorescence From Aggregated Azobenzenes Without Photo Irradiation1

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2021

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“…At this point, radiative transition, the luminescence process, becomes the main mode of energy release from the excited state [75]. Following the AIE mechanism, the aggregates of luminous azobenzenes achieved typically rigid molecular structures, and radiative decay was activated because of the restriction of intramolecular motion [76]. Increased fluorescence was achieved with azo compound 11 (Figure 10), the earliest luminescent azobenzene reported, via bilayer aggregates with a head-to-tail orientation [24].…”

Section: Fluorescence From Aggregated Azobenzenes Without Photo Irradiationmentioning

confidence: 99%

Fluorescent Azobenzene-Containing Compounds: From Structure to Mechanism

et al. 2021

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The reversible photoisomerization of azobenzenes has been extensively studied to construct systems with optical responsiveness; however, this process limits the luminescence of these compounds. Recently, there have been many efforts to design and synthesize fluorescent azobenzene compounds, such as inhibition of electron transfer, inducing aggregation, and metal-enhancement, which make the materials ideal for application in fluorescence probes, light-emitting devices, molecular detection, etc. Herein, we review the recently reported progress in the development of various fluorescent azobenzenes and summarize the possible mechanism of their fluorescence emission. The potential applications of these materials are also discussed. Finally, in order to guide research in this field, the existing problems and future development prospects are discussed.

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Section: Fluorescence From Aggregated Azobenzenes Without Photo Irradiationmentioning

confidence: 99%