Preparation and photophysical properties of red region dual-state emission BODIPY
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College of Materials and Chemical Engineering,Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials,China Three Gorges University

Clc Number:

TQ630

Fund Project:

National Natural Science Foundation of China (No. 22108157);The 111 Project (D20015),

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    Abstract:

    Meso-unsubstituted and methyl group substituted BODIPYs and their ligands have been obtained with indole derivatives and 1, 8-naphthalenimide by condensation and coordination reactions. Structures were characterized by NMR, HRMS, single crystal and electronic spectra. The results indicated that the solid emission spectra red-shifted 34 nm by the introduction of methyl group at meso-position. BODIPYs show high intensity fluorescence in dual state (solution and solid state). The liquid and solid fluorescence quantum yields of Ⅳ are as high as 66% and 76.3% respectively. Its solid fluorescence quantum yield is 4.2 times higher than that of Ⅱ (14.6%). The excellent optical properties of Ⅳ can be attributed to the absence of C—H…π interaction and different “head to tail” π-π stacking between layers. Excellent dual state emission luminogens glowing at red region have been obtained by the introduction of methyl group, which is different from other strategies and enriches the types of dual state organic luminescent materials.

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History
  • Received:September 28,2022
  • Revised:December 02,2022
  • Adopted:December 06,2022
  • Online: May 11,2023
  • Published:
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