Effect of acidity on morphologies and photodimerization kinetics in Langmuir-Blodgett monolayers of styrylquinoline derivatives

Effect of acidity on morphologies and photodimerization kinetics in Langmuir-Blodgett monolayers of styrylquinoline derivatives
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酸性对苯乙烯基喹啉衍生物 Langmuir-Blodgett 单层形态和光二聚动力学的影响

DOI:
10.1016/j.cclet.2017.05.006
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发表时间:
2017-06
影响因子:
9.1
通讯作者:
Zhou Lu
Zhou Lu
中科院分区:
化学1区
文献类型:
--
作者:
Yixue Ma;Lu Lin;Li Zhang;Minghua Liu;Yuan Guo;Zhou Lu

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利用实时二次谐波技术研究了苯乙烯基喹啉(SQ)衍生物在不同酸度水相沉积的LB膜中的[2+2]光二聚反应.结果发现,光二聚反应速率常数显着降低后,加入酸。额外的原子力显微镜测量显示,表面形貌与光二聚动力学。这些实验结果为LB膜中[2+2]光二聚反应的拓扑化学机制提供了直接证据。目前的研究表明,分子间的相互作用和聚集结构在表面的光化学性质起着重要的作用。
The real-time second harmonic generation was employed to investigate the [2+2] photodimerization of styrylquinoline (SQ) derivatives in Langmuir-Blodgett (LB) monolayers deposited from aqueous subphases with different acidity. It was discovered that the photodimerization rate constant significantly decreased upon the addition of acid. The additional atomic force microscopy measurements revealed that surface morphologies were correlated to the photodimerization kinetics. These experimental results provide direct evidence for the topo-chemical mechanisms of [2+2] photodimerization in LB films. The current study demonstrates that the intermolecular interactions and aggregation structures play important roles in the photochemical properties at surfaces.
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