Synthesis of regioisomerically pure piperidine substituted perylenebisimide NIR dyes: A comparative study of spectroscopic, electrochemical and crystalline properties
作者:Ejaz Hussain、Huipeng Zhou、Na Yang、Sohail Anjum Shahzad、Cong Yu
DOI:10.1016/j.dyepig.2017.08.002
日期:2017.12
1,6 isomers (1B and 2B). Other structural analogues 1, 1PBr2, 2, 2PBr2 displayed reversible reductions. Thus a regular trend of changes in optical and electrical properties was observed on bromine and piperidine substitution. The observed outstanding properties clearly justify that our compounds might be promising candidates for various future applications such as biosensors, biomarkers, semiconductors
新的区域异构纯绿色和蓝色染料,即。合成了1,7和1,6哌啶取代的ylene二酰亚胺(1A,1B,2A,2B)。的光物理特性与未取代的和溴化perylenebisimide类似物(比较1,1PBr 2,2,2PBr 2)。在二溴per-3,4,9,10-四羧酸二酐被酰亚胺化后,哌啶被替换在海湾区域,从而引起强烈的红移。大的红移降低了光学带隙,这是具有改进的光伏效率的近红外吸收荧光染料的关键特征。所有合成的荧光团均通过NMR和质谱表征。通过UV-Vis,荧光法和循环伏安法评估了光物理性质。通过采用梯度法估计荧光量子产率。X射线衍射图中明确定义的尖峰证实了1A和1B的晶体性质。相反,2A和2B被发现是非晶体的。TG-DSC的热分析进一步探讨了染料的稳定性和相变。通过使用密度泛函理论(DFT)在B3LYP / 6–31(d,p)处描述了HOMO和LUMO分子轨道。循环伏安法探测的电化学行为表明,有1