Crystal structures of anti- and syn-9,10-di(1′-naphthyl)anthracene and isomerization in solid state
作者:Cho Hee Lee、Mi Jong Kim、Sang-Pil Han、Yoo-Soon Lee、Sung Kwon Kang、Jae Hee Song、Jong Tae Je、Hyoung-Yun Oh、Yeong-Joon Kim
DOI:10.1016/j.tet.2010.02.072
日期:2010.5
9,10-Di-(1'-naphthyl)anthracene is often used as electroluminescence materials in organic light-emitting diodes. Because of the hindered rotation about the sigma-bond between naphthyl and anthracene chromophore, two possible stereoisomers can be isolated. HPLC, H-1 NMR, and C-13 NMR spectra gave two different sets of peaks and the X-ray single crystal analysis confirmed the structures of the two isomers, anti and syn. syn was more soluble than anti in THF as well as toluene and the thermal properties of the two were quite different. Differential scanning calorimetry study and HPLC analysis showed that the isomerization between anti and syn in the solid state took place at >370 degrees C. (C) 2010 Elsevier Ltd. All rights reserved.