The origin of lignin fluorescence
The origin of lignin fluorescence
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DOI：
10.1016/s0022-2860(98)00913-2
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发表时间：
1999-09-14
影响因子：
3.8
通讯作者：
Stomberg, R
中科院分区：
文献类型：
--
作者：
Albinsson, B;Li, SM;Stomberg, R
云杉木质素表现出荧光发射光谱，在240至320 nm波长范围内的激发峰约为360 nm。这可以通过木质素发色团的非辐射能量转移来解释，木质素发色团在240-320 nm波长范围内被激发，到一个发出大约360 nm荧光的受体。木质素样品和模型化合物的检查表明，木质素中的少量苯香豆酮结构是一种可能的受体。这种结构和二苯乙烯结构是由苯基香豆素型木质素中的结构元素在不同处理下形成的。考察了苯香豆酮结构模型[2-（3,4-二甲氧基苯基）-7-甲氧基-3-甲基[b]-呋喃，2-（3,4-二甲氧基苯基）-3-羟甲基-7-甲氧基苯基[b]呋喃]和二苯乙烯结构模型（2-羟基-3,3',4'-三甲氧基苯乙烯的E型和Z型）的光物理性质，并在晶体结构测定的基础上进行了讨论。(C) 1999 Elsevier Science B.V.版权所有
Spruce lignin exhibits fluorescence emission spectra that peaks at approximate to 360 nm on excitation at wavelengths ranging from 240 to 320 nm. This can be explained by non-radiative energy transfer from lignin chromophores, that are excited in the wavelength range 240-320 nm, to an acceptor that emits fluorescent Light at approximate to 360 nm. Examinations of lignin samples and model compounds suggest that small amounts of phenylcoumarone structures in the lignin is a conceivable acceptor. Such structures and stilbene structures are formed from structural elements in lignin of the phenylcoumaran type on various treatments. The photophysical properties of models for phenylcoumarone structures [2-(3,4-dimethoxyphenyl)-7-methoxy-3-methyo[b]-furan, 2-(3,4-dimethoxyphenyl)-3-hydroxymethyl-7-methoxybenzo[b]furan] and stilbene structures (the E and Z forms of 2-hydroxy-3,3',4'-trimethoxystilbene) have been examined and are discussed on the basis of crystal structure determinations. (C) 1999 Elsevier Science B.V. All rights reserved.