New strategies and building blocks for functionalised 9,10-bis(1,3-dithiol-2-ylidene)-9,10-dihydroanthracene derivatives, including pyrrolo-annelated derivatives and π-extended systems with intramolecular charge-transferThis paper is Molecular Saddles Part 10. For Part 9 see reference 5c.Electronic supplementary information (ESI) available: NOE spectra for compound 23. See http://www.rsc.org/suppdata/ob/b2/b211153p/
作者:Christian A. Christensen、Martin R. Bryce、Andrei S. Batsanov、Jan Becher
DOI:10.1039/b211153p
日期:2003.1.30
new functionalised 9,10-bis(1,3-dithiol-2-ylidene)-9,10-dihydroanthracene (TTFAQ) derivatives have been synthesised from the key di(halomethyl) building blocks, 10-[4,5-bis(bromomethyl)-1,3-dithiol-2-ylidene]-anthracene-9(10H)-one 10, 10-[4,5-bis(chloromethyl)-1,3-dithiol-2-ylidene]anthracene-9(10H)-one 11 and 9-[4,5-bis(chloromethyl)-1,3-dithiol-2-ylidene]-10-[4,5-bis(hexylsulfanyl)- 1,3-dithiol-2-ylidene]-9
在维尔斯迈尔条件下,将32和33的吡咯环单甲酰化,得到35和36,与2、4、5、7-四硝基芴反应后,得到供体-π受体二单元基38和39。溶液中的循环伏安法(CV)对于所有TTFAQ衍生物,其显示TTFAQ核的典型准可逆两电子氧化波的电势随取代基的不同而略有不同。例如,Eox的值通过分别21和38的吸电子蒽醌和四硝基芴单元提高。共轭TTFAQ二聚体23的CV显示出两个二电子氧化波,分别对应于23(2+)和23(4+)的依次形成(δEox = 130 mV),提供了明显的分子内电子相互作用的证据,即指示23(2+)充当共轭供体-pi-受体二价体,从而提高了其合作伙伴TTFAQ单元的氧化潜力。对23的光谱电化学研究支持这一解释。在TTFAQ-π-四硝基芴二单元38和39的UV-Vis光谱中可见到最大538 nm处的强分子内电荷转移带。据报道,化合物30、33和34的X射线晶体结构。 TTFAQ部