Orientation of bromination in bay-region of perylene diimides
摘要:
We found that the entering position of the bromination in the bay-region (e.g., 1,6,7,12-positions) was precisely determined by the orientation director(s), either individually or cooperatively. In particular, a combination of two directors shows precisely positioning for the third entering bromo with an effect of '1+1>2'. (C) 2013 Elsevier Ltd. All rights reserved.