KuQuinones as sensitizers for NiO based p-type dye-sensitized solar cells
作者:Matteo Bonomo、Federica Sabuzi、Aldo Di Carlo、Valeria Conte、Danilo Dini、Pierluca Galloni
DOI:10.1039/c6nj03466g
日期:——
A new series of KuQuinones (KuQs) have been synthesized and employed as dye-sensitizers for NiO-based p-type dye-sensitizedsolarcells (p-DSSCs). KuQs are pentacyclic quinoid compounds which are characterized by a fully conjugated structure that is responsible for the strong and broad absorption in the visible spectrum. The HOMO/LUMO states of KuQs considered here have matching energy levels with
合成了一系列新的KuQuinones(KuQs),并用作基于NiO的p型染料敏化太阳能电池(p-DSSC)的染料敏化剂。KuQ是五环醌化合物,其特征在于完全共轭的结构,该结构负责在可见光谱中的强而宽的吸收。这里考虑KuQs的HOMO / LUMO状态与氧化镍价带和我的上边缘匹配的能量水平- / I 3 -氧化还原电位能量。这些特征使得这些化合物适合于在p-DSSC中的NiO敏化。这里提出的新的羧酸取代的KuQ衍生物在烷基链的长度上不同。该合资公司记录了特性曲线和外部量子效率谱。结果表明,尽管锚定基团和光吸收单元之间没有电子共轭,但KuQ敏化细胞的性能与基准敏化剂赤藓红B(Ery B)相似。该结果使我们假设,激发的KuQ染料和NiO电极之间的光诱导电荷转移是通过空间发生的,而不是通过化学键发生的,因为这通常发生在这些系统中。红外光谱数据支持了电荷在太空中的传输机制。
Unexpected One-Pot Synthesis of Highly Conjugated Pentacyclic Diquinoid Compounds
A new class of pentacyclic diquinoid compounds has been synthesized with a facile one-pot reaction of two molecules of 2-hydroxynaphthoquinone and 1-bromoalkanes in the presence of ferrocene. These molecules were isolated as enol tautomers that exhibit intramolecular hydrogen bond and extended electronic conjugation as proved by the intense absorption spectrum with a broad band between 400 and 600 nm. The spectroscopic and electrochemical characterization of this new class of compounds has been performed. One of the synthesized diquinoid derivatives showed a significant cytotoxicity with IC50 values of 25-50 mu M against Cisplatin-Resistant SKOV3 and colon carcinoma SW480 cell lines. The results of our study provide a valuable tool to a one-pot synthesis of highly conjugated polyquinones, analogous to important biological systems, with significant antitumoral activity.
Dimerizations of 2-bromo-3-methyl-1,4-naphthoquinone and 2-methyl-1,4-naphthoquinone in tetra-n-butylammonium bromide
organic solvent with an ionic solvent frequently changes the mechanism of a reaction. In this study, reactions of 2-bromo-3-methyl-1,4-naphthoquinone and 2-methyl-1,4-naphthoquinone in ionic liquids were examined. Dimerization of 2-bromo-3-methyl-1,4-naphthoquinone or 2-methyl-1,4-naphthoquinone with N-methylcyclohexylamine in tetra-n-butylammonium bromide (TBAB), an ionic liquid, under an aerobic atmosphere