Abstract Metal salts application on wood surface is a simple and nontoxic method that can be used for wood color modification, which is induced by the formation of colored complexes between wood extractives and metal ions. In this study, we have combined several analytical methods to understand the color development for four North American hardwood species: white oak, red oak, sugar maple and yellow birch. The phenolic composition of the ethanolic extracts of heartwood and sapwood of the four wood species was studied by UV-Vis spectrometry and liquid state phosphorus-31 nuclear magnetic resonance spectroscopy (31P NMR) and analyzed in relation to color development. The correlations between different OH types and the color development as measured with the CIEL*a*b* color coordinates, indicate that the descending order of correlation for phenolic hydroxyls was: di-substituted OH, mono-substituted OH and un-substituted OH while no correlation was found between COOH hydroxyls and total color change (ΔE).

中文翻译：

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有助于通过分析方法的组合了解用铁盐处理的木材表面的颜色发展

摘要 金属盐在木材表面的应用是一种简单、无毒的木材颜色改性方法，它是由木材提取物与金属离子之间形成有色络合物引起的。在这项研究中，我们结合了多种分析方法来了解四种北美硬木树种的颜色发展：白橡木、红橡木、糖枫木和黄桦木。通过紫外-可见光谱法和液态磷 31 核磁共振光谱 (31P NMR) 研究了四种木材的心边材乙醇提取物的酚类成分，并分析了颜色发展的相关性。使用 CIEL*a*b* 颜色坐标测量的不同 OH 类型与显色之间的相关性，