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<p>Blue-emissive carbon dots (CDs) were synthesized using tetraphenylethylene and benzothiadiazole carbaldehyde via solvothermal method. The as-synthesized solvothermal product was purified via column chromatography technique. Among all eluted fractions, the third fraction demonstrated blue fluorescence (λ<sub>em</sub> = 490&#xa0;nm). TEM imaging showed quasi-spherical CDs with polycrystalline nature having diameters ranging between 5 and 35&#xa0;nm. Upon addition of water to the CDs dispersion the precipitate formed showed prominent blue fluorescence (λ<sub>em</sub> = 450&#xa0;nm). Further, the CDs were dispersed in hydroxyethyl cellulose, a water-soluble binder to formulate a water-based ink and was&#xa0;printed on UV dull paper by screen printing technique. The print proofs displayed prominent blue fluorescence (λ<sub>em</sub> = 450&#xa0;nm) with good adherence and photostability.</p> Graphical Abstract <p></p>

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Synthesis and purification of carbon dots from fluorescent precursors as colorant for fluorescent ink

  • 期刊论文

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  • 发表日期：

    2025年9月17日

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  • Namratha Ullal,
  • M. Ranjana,
  • B. K. Adithya,
  • Dhanya Sunil,
  • Suresh D. Kulkarni,
  • K. Udaya Bhat

摘要

Blue-emissive carbon dots (CDs) were synthesized using tetraphenylethylene and benzothiadiazole carbaldehyde via solvothermal method. The as-synthesized solvothermal product was purified via column chromatography technique. Among all eluted fractions, the third fraction demonstrated blue fluorescence (λem = 490 nm). TEM imaging showed quasi-spherical CDs with polycrystalline nature having diameters ranging between 5 and 35 nm. Upon addition of water to the CDs dispersion the precipitate formed showed prominent blue fluorescence (λem = 450 nm). Further, the CDs were dispersed in hydroxyethyl cellulose, a water-soluble binder to formulate a water-based ink and was printed on UV dull paper by screen printing technique. The print proofs displayed prominent blue fluorescence (λem = 450 nm) with good adherence and photostability.

Graphical Abstract