Synthesis and structural determination of thermochromic compound

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Authors

  • To Phuong Linh Institute of New Technology, Academy of Military Science and Technology
  • Nguyen Minh Tri Institute of New Technology, Academy of Military Science and Technology
  • Le Ngoc Hoan Institute of New Technology, Academy of Military Science and Technology
  • Pham Van Nam Military Technical Academy
  • Vu Ngoc Toan (Corresponding Author) Institute of New Technology, Academy of Military Science and Technology

DOI:

https://doi.org/10.54939/1859-1043.j.mst.99.2024.54-60

Keywords:

CVL; Crystal violet lactone; Thermochromic compound; Thermochromic materials.

Abstract

Thermochromic materials are extensively utilized in various fields, such as healthcare, textiles, and military applications. The exceptional thermal properties of these materials are attributed to the thermochromic substances they contain. Lactone-based thermochromic compounds, known for their high sensitivity, broad color change range, and durability, have been extensively researched and developed. In this article, a thermochromic compound, crystal violet lactone (CVL), chemically identified as 3,3-bis(4-dimethylaminophenyl)-6-dimethylaminophthalide, was prepared through two steps by the reaction of N,N-dimethylaniline, m-dimethylaminobenzoic acid, and p-dimethylamino-benzaldehyde in acid condition. CVL exists in white powder, melting point 180 - 183 oC, yield 61.6%. The product structure was determined by modern physical methods such as IR, 1D NMR, 2D NMR, and MS spectra.

References

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[3]. Zhao, Wenting, et al, “Preparation of thermochromic microcapsules of bisphenol A and crystal violet lactone and their effect on coating properties”, Polymers, 14(7), 1393, (2022). DOI: https://doi.org/10.3390/polym14071393

[4]. Donald Roy Maulding, Somerville, et al. “Process of the manufacturing of crystal violet lactone”, US Patent, 778 399, (1978).

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Published

25-11-2024

How to Cite

Tô, L., Nguyễn Minh Trí, Lê Ngọc Hoan, Pham Van Nam, and Vũ Ngọc Toán. “Synthesis and Structural Determination of Thermochromic Compound”. Journal of Military Science and Technology, vol. 99, no. 99, Nov. 2024, pp. 54-60, doi:10.54939/1859-1043.j.mst.99.2024.54-60.

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Section

Chemistry, Biology & Environment

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