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Abstract <p>Schiff base pyrazolone derivatives have attracted considerable interest owing to their remarkable photochromic and electrochromic properties, which make them promising candidates for molecular switches, sensors, and advanced optical materials. In this study, Schiff base 4-[1-(1,5-dimethyl-3-oxo-2-phenyl-pyrazolidin-4-ylimino)-ethyl]-5-methyl-2-phenyl-2,4-dihydro-pyrazol-3-one (A) was successfully synthesized and structurally characterized by NMR, IR, LC-MS, and UV–vis absorption spectroscopy. The compound exhibited distinct photochromic and electrochromic responses upon external optical and electrical stimulation. The observed photochromic behavior is attributed to a reversible photoinduced enol–keto transformation within the pyrazolone framework.</p>

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A New Pyrazolone-Derived Schiff Base: Synthesis and Photo-, Electrochromic Properties

  • 期刊论文

  • 发表日期：

    2026年8月2日

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  • Pratima Surati

摘要

Abstract

Schiff base pyrazolone derivatives have attracted considerable interest owing to their remarkable photochromic and electrochromic properties, which make them promising candidates for molecular switches, sensors, and advanced optical materials. In this study, Schiff base 4-[1-(1,5-dimethyl-3-oxo-2-phenyl-pyrazolidin-4-ylimino)-ethyl]-5-methyl-2-phenyl-2,4-dihydro-pyrazol-3-one (A) was successfully synthesized and structurally characterized by NMR, IR, LC-MS, and UV–vis absorption spectroscopy. The compound exhibited distinct photochromic and electrochromic responses upon external optical and electrical stimulation. The observed photochromic behavior is attributed to a reversible photoinduced enol–keto transformation within the pyrazolone framework.