Elucidation of the Fe(III) Gallate Structure in Historical Iron Gall Ink

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• 作者：Aldo Ponce ; Lynn B. Brostoff ; Sarah K. Gibbons ; Peter Zavalij ; Carol Viragh ; Joseph Hooper ; Sufian Alnemrat ; Karen J. Gaskell ; Bryan Eichhorn
• 刊名：Analytical Chemistry
• 出版年：2016
• 出版时间：May 17, 2016
• 年：2016
• 卷：88
• 期：10
• 页码：5152-5158
• 全文大小：458K
• 年卷期：0
• ISSN：1520-6882

文摘

Synthetic, structural, spectroscopic and aging studies conclusively show that the main colorant of historical iron gall ink (IGI) is an amorphous form of Fe(III) gallate·xH₂O (x = ∼1.5–3.2). Comparisons between experimental samples and historical documents, including an 18th century hand-written manuscript by George Washington, by IR and Raman spectroscopy, XRD, X-ray photoelectron spectroscopy, and Mössbauer spectroscopy confirm the relationship between the model and authentic samples. These studies settle controversy in the cultural heritage field, where an alternative structure for Fe(III) gallate has been commonly cited.