(39)Synthesis and Photovoltaic Properties of Novel Solution-Processable Triphenylamine-Based Dendrimers with Sulfonyldibenzene Cores, Kunpeng Li, Jiali Qu, Bin Xu, Yinhua Zhou, Leijing Liu, Ping Peng and Wenjing Tian*, New J. Chem., 2009, 33, 2120-2127