烯-甲希夫基作为隐形墨水中的智能颜料,具有多种安全功能,用于先进的防伪和法医应用
Kashmitha Muthamma1, Sudarshan Acharya2, Dhanya Sunil1
1Department of Chemistry, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, Karnataka 576104, India.
Journal of colloid and interface science
|September 15, 2023
概括
一种新型的 - 纳 Schiff 基 (FNH) 能够使无形的安全油墨具有独特的光学特性,用于防伪和法医应用. 这些油墨提供多层次的认证,包括在擦时可逆光变化和对不同光源的独特反应.
科学领域:
- 材料科学 材料科学 材料科学
- 有机化学 有机化学
- 法医科学 法医科学 法医科学
背景情况:
- 具有光学特性的智能功能材料对于防伪和法医科学至关重要.
- 聚合诱导的排放和机械色是先进安全功能所需的特性.
研究的目的:
- 合成一种具有独特光学特性的-甲希夫基 (FNH).
- 开发使用FNH进行文档和产品身份验证的隐形安全墨水.
- 探索FNH在法医科学中用于隐藏指纹检测的应用.
主要方法:
- 烯-甲 Schiff 基 (FNH) 的合成.
- 基于水/溶剂的隐形安全油墨的配方.
- 用于柔性印刷/幕印刷的油墨的应用.
- 非破坏性 (擦拭,紫外线/可见光) 和破坏性 (化学接触) 认证方法的测试.
- 对隐藏指纹可视化 FNH 的评估.
主要成果:
- FNH表现出聚合诱导的发射,机械色,以及取决于激发的光.
- 隐形的安全打印显示在摩擦时增强的色光,这是可逆的.
- 在不同的光源下 (270-400nm和420-480nm) 观察到不同的光辐射 (蓝,黄色,蓝绿).
- 化学处理 (THF,NaOH/KOH) 诱导特定的颜色光 (红色,黄色).
- 地面FNH有效地可视化隐藏指纹的I-II级细节.
结论:
- FNH是一种多功能单色素,用于多层安全油墨,具有易于验证,难以复制的特征.
- 摩擦时可逆的光变化允许文档重复使用.
- 在法医科学中,FNH在隐藏指纹分析方面显示出显著的潜力.
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