Shi W, Hou X, Liu T, Zhao X, Sieval A B, Hummelen J C, Dennis T J S
School of Physics and Astronomy, Queen Mary University of London, Mile End Road, London, E1 4NS, UK.
Solenne BV, Zernikepark 6, 9747AN, Groningen, The Netherlands.
Chem Commun (Camb). 2017 Jan 10;53(5):975-978. doi: 10.1039/c6cc07820f.
The as-produced isomer mixture of the organic photovoltaic device acceptor material bis-[60]PCBM has been purified into its constituents by peak-recycling HPLC, and those individual isomers were characterised by UV-Vis absorption spectroscopy and cyclic voltammetry. A total of 18 isomers were purified from the mixture to a standard exceeding 99.5% with respect to other isomers. The HOMOs, LUMOs, and HOMO-LUMO gaps of the purified isomers vary from -5.673 to -5.444 eV, -3.901 to -3.729 eV, and 1.664 to 1.883 eV, respectively. We also find a correlation between HPLC retention time and the relative positions of the addends; in that generally the closer the addends are to each other the longer the retention time of the isomer, and vice versa.
有机光伏器件受体材料双-[60]PCBM的初始异构体混合物已通过峰循环高效液相色谱法（HPLC）纯化，分离出其各个组分，并且通过紫外可见吸收光谱和循环伏安法对这些单个异构体进行了表征。从混合物中总共纯化出18种异构体，相对于其他异构体，纯度超过99.5%的标准。纯化后异构体的最高占据分子轨道（HOMO）、最低未占据分子轨道（LUMO）以及HOMO-LUMO能隙分别在-5.673至-5.444电子伏特、-3.901至-3.729电子伏特和1.664至1.883电子伏特之间变化。我们还发现HPLC保留时间与加成物的相对位置之间存在相关性；一般来说，加成物彼此越接近，异构体的保留时间就越长，反之亦然。
