合成了一系列新的末端被1-(1,1-二氰亚甲基)-环己-2-烯(DCC)受体取代的受体-供体-受体低聚噻吩。表征了π扩展DCC n Ts(n = 1-4)的结构,热,光电和光伏性质,并将其与一系列母体双氰基乙烯基(DCV)取代的低聚噻吩DCV n T的趋势进行了对比。性质揭示了新型DCC n T衍生物中反式构型中额外的环外,空间固定的双键的影响。双键数目相等的导数的紧密对应关系,即DCC n Ts和DCV(n+ 1)Ts,被识别。尽管具有相同的能隙,所述前线轨道,HOMO和LUMO,对于DCC的能级-衍生物被升高并且更不稳定由于噻吩环与2个外双键的芳构化能量指示改进的供体和降低的受体强度。DCC-对噻吩具有良好的光伏性能,因为真空处理的太阳能电池中的供体材料(功率转换效率≤4.4%)明显优于所有可比的DCV4T衍生物。
Structurally Simple Dipolar Organic Dyes Featuring 1,3-Cyclohexadiene Conjugated Unit for Dye-Sensitized Solar Cells
作者:Kuan-Fu Chen、Ying-Chan Hsu、Qiongyou Wu、Ming-Chang P. Yeh、Shih-Sheng Sun
DOI:10.1021/ol802630x
日期:2009.1.15
A series of structurally simple dipolar light-harvesting organic dyes featuring 1,3-cyclohexadiene in the aromatic pi framework for dye-sensitized solar cells has been synthesized and characterized. The highest conversion efficiency of the DSSCs based on these dyes can reach up to 4.4%.
Palladium-catalyzed dehydrogenative coupling of cyclic enones with thiophenes: a rapid access to β-heteroarylated cyclic enones
Dehydrogenative coupling of cyclic enones with heteroarenes has been a longstanding challenge because of the competitive ketone dehydrogenation and conjugated addition. Herein, a dehydrogenative couplingreaction of cyclic enones of different sizes with substituted thiophenes to construct β-thienyl cyclic enone compounds through palladium-catalyzed C–H functionalization under mild reaction conditions is
fixed doublebonds in trans‐configuration in the novel DCCnT derivatives. A close correspondence for derivatives with equal number of doublebonds, that is, DCCnTs and DCV(n + 1)Ts, is identified. Despite having the same energy gap, the energy levels of the frontier orbitals, HOMO and LUMO, for the DCC‐derivatives are raised and more destabilized due to the aromatization energy of a thiophene ring versus
合成了一系列新的末端被1-(1,1-二氰亚甲基)-环己-2-烯(DCC)受体取代的受体-供体-受体低聚噻吩。表征了π扩展DCC n Ts(n = 1-4)的结构,热,光电和光伏性质,并将其与一系列母体双氰基乙烯基(DCV)取代的低聚噻吩DCV n T的趋势进行了对比。性质揭示了新型DCC n T衍生物中反式构型中额外的环外,空间固定的双键的影响。双键数目相等的导数的紧密对应关系,即DCC n Ts和DCV(n+ 1)Ts,被识别。尽管具有相同的能隙,所述前线轨道,HOMO和LUMO,对于DCC的能级-衍生物被升高并且更不稳定由于噻吩环与2个外双键的芳构化能量指示改进的供体和降低的受体强度。DCC-对噻吩具有良好的光伏性能,因为真空处理的太阳能电池中的供体材料(功率转换效率≤4.4%)明显优于所有可比的DCV4T衍生物。