Impact of the Linker on the Electronic and Luminescent Properties of Diboryl Compounds: Molecules with Two BMes<sub>2</sub> Groups and the Peculiar Behavior of 1,6-(BMes<sub>2</sub>)<sub>2</sub>pyrene
作者:Shu-Bin Zhao、Philipp Wucher、Zachary M. Hudson、Theresa M. McCormick、Xiang-Yang Liu、Suning Wang、Xiao-Dong Feng、Zheng-Hong Lu
DOI:10.1021/om800856g
日期:2008.12.22
toward fluoride ions. Upon addition of fluoride ions, compound 1 displays an unusual red shift and an on−off response in both absorption and fluorescent spectra. By comparing the behavior of 1 to that of the monoboryl compound 1-BMes2pyrene (2) and 3, and with TD-DFT computations on 1 and its fluoride adducts 1F and 1F2, it has been found that the peculiar response of 1 toward fluoride ions is caused by
为了研究接头对二硼烷基化合物电子和光物理性质的影响,已合成了包含两个BMes 2基团(Mes = mesityl)的三个新的二硼烷基化合物,包括平面1,6-(BMes 2)2((1),V形双(对-BMes 2苯基)二苯基硅烷(4)和U形1,8-双(对-BMes 2苯基)萘(5)。为了比较,两种先前已知的化合物,对-(BMes 2)2苯(3)和1,8-双(p -BMes 2还研究了-联苯)萘(6)。已经发现这些分子中的芳族连接基通过其独特的空间和电子性质对二硼烷基化合物的电子接受能力和路易斯酸度具有显着影响。化合物1具有最大的正还原电位(相对于FeCp 2 0 / +,E 1/2 red1 = -1.81 V ),而化合物5具有最大的负还原电位(E 1/2 red1 = -2.34 V)。所有化合物都是蓝色发射体,其发射能量和效率有很大的变化(例如,对于λem = 446、402、395 nm,Φ=〜1