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在染色体溶解有机物溶液中对利格宁相关化合物的光转化

Ruiya Zhou¹, Juan Liu¹, Chi Zhou²

¹School of Resources and Environmental Science, Wuhan University, Wuhan, 430079, P.R. China.

|September 17, 2023

概括

像烯酸和甲这样的宁化合物与染色体溶解有机物 (CDOM) 形成复合体. 它们的光转化主要是由CDOM的三重激发状态驱动的,而不是单氧.

科学领域:

环境化学环境化学
摄影化学的使用.
有机地化学有机地化学

背景情况:

氨酸是染色体溶解有机物 (CDOM) 的重要陆地来源.
了解素单体的光转化对于阐明CDOM分子内相互作用至关重要.
来自素的基碳化合物,如基化 (Coni),甲 (Sina) 和素 (Van),是其关键成分.

研究的目的:

为了研究与CDOM的素单体的复杂化行为.
确定这些化合物与单个氧 (1O2) 和CDOM (3CDOM*) 的三重激发状态的反应动力学.
在CDOM中阐明素衍生物化合物的主要光化学转化途径.

主要方法:

谱分析以确定CDOM复杂化的平衡常数.
用1O2和3CDOM*测量双分子反应速率常数的动力学研究.
使用NaN3和furfuryl酒精进行扫描实验,以评估1O2和3CDOM*在光变中的作用.

主要成果:

甲基和甲基表现出与CDOM显著的复杂化,而素显示出最小的亲和力.
使用3CDOM*的反应速率常数大约比使用1O2.2的常数高出一个数量级.
单片氧,H2O2和过氧基在酸性CDOM溶液中影响微不足道;3CDOM*是主要的反应物种.

结论:

在CDOM中,烯酸和烯酸的光转化主要由CDOM的三重激发状态介导.
单一氧气起到较小的作用,其贡献可以通过使用传统的清洁剂来高估.
在CDOM复合体内的未灭的CDOM*或分子内反应有助于观察到的转变.

关键词:

这是一个CDOM复杂的CDOM复杂.素相关化合物素相关化合物锡纳帕尔化物锡纳帕尔化物单子兴奋状态的单子.

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