Novel near-infrared fluorescent liquid crystal: Bodipy bearing multiple alkyl chains with columnar mesophase

ABSTRACT

By the typical Knoevenagel condensation of Bodipy with aldehyde derivatives, two novel Bodipy derivatives 3 and 6 with symmetric three and six alkyl chains were designed and prepared. The Bodipy derivative 3 with three alkyl chains showed no mesophase but the Bodipy derivative 6 with six alkyl chains possessed the orderly hexagonal columnar mesophase at room temperature. Both samples 3 and 6 exhibited the near-infrared fluorescence with high fluorescence quantum yields and larger Stokes shifts than their Bodipy precursors. Sample 6 was the first near-infrared fluorescent columnar liquid crystal with Bodipy core. This research presented a good strategy on constructing the near-infrared columnar Bodipy liquid crystal.

GRAPHICAL ABSTRACT

KEYWORDS:

• Near-infrared
• Bodipy
• fluoresence
• columnar
• mesophase

Acknowledgments

Financial support from the National Natural Science Foundation of China (No: 21406036), Fujian Natural Science Foundation of China (No. 2017J01571), Fuzhou science and technology project (2018-G-44) and the National Undergraduate Innovation Program in Fujian Normal University (2018) were greatly acknowledged.

Disclosure statement

No potential conflict of interest was reported by the authors.

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Additional information

Funding

Financial support from the National Natural Science Foundation of China (No: 21406036), Fujian Natural Science Foundation of China (No. 2017J01571), Fuzhou science and technology project (2018-G-44) and the National Undergraduate Innovation Program in Fujian Normal University (2018) were greatly acknowledged..