Influence of imide-substituents on the H-type aggregates of perylene diimides bearing cetyloxy side-chains at bay positions
作者:Michael Ruby Raj、Rajamani Margabandu、Ramalinga Viswanathan Mangalaraja、Sambandam Anandan
DOI:10.1039/c7sm01918a
日期:——
A series of perylene-3,4:9,10-tetracarboxylic acid diimides (PDIs, namely TYR-PDI, AEP-PDI, CET-PDI, ANP-PDI and KOD-PDI), comprising long linear cetyloxy side-chains functionalized at the 1,7-bay positions and the different substituents (i.e., hydrophobic/hydrophilic segments) symmetrically linked at the two imide-positions of the perylene core were synthesized to investigate the influence of imide-substituent
一系列of 3,4:9,10-四羧酸二酰亚胺(PDI,即TYR-PDI,AEP-PDI,CET-PDI,ANP-PDI和KOD-PDI),包括在以下位置官能化的长线性十六烷氧基侧链1,7-bay位置和不同的取代基(即,在per核心的两个酰亚胺位点对称连接的疏水(亲水/亲水链段)被合成,以研究酰亚胺取代基模式对PDI聚集行为的影响。通过紫外可见吸收,荧光和时间分辨光致发光光谱研究了这些PDI的光物理性质。PDI的光物理性质的差异表明(i)在溶液和薄膜中蓝移和变宽的吸收性质,(ii)在溶液中最大发射时红移和变宽的荧光行为,但是,蓝移薄膜中的荧光行为,以及(iii)明显更长的荧光寿命,对应于旋转移位的H型聚集体的存在。通过扫描电子显微镜合理化了通过柱状矩形H型PDI聚集体的面对面排列形成的短程有序棒状微结构。X射线衍射研究表明,形成明确的圆柱状矩形(Colrp)H型PDI聚集体表明,所有PDI的柱内堆积距离几乎恒定,约为3