units. Starting from this discovery, three dimeric dyes were constructed, and their optical properties were examined. Although the two fluorescent units were orthogonal in each dye, efficient energy transfer was observed in dimeric dye 16 in three solvent systems. In contrast, solvent-dependent energy transfer was detected for another dimeric dye, 5. After close investigation, we found that the orientation
Alternative simple and effective synthesis of (di)benzoxanthones and their functions toward fluorescent dyes
作者:Eriko Azuma、Kouji Kuramochi、Kazunori Tsubaki
DOI:10.1016/j.tet.2012.12.035
日期:2013.2
(Di)benzoxanthones possessing additional benzene units on one or both sides of xanthone were prepared via dehydration of the corresponding dihydroxybenzophenone, where a catalytic amount of K2CO3 dramatically increased the yields. Chemical transformations of the versatile carbonyl groups of (di) benzoxanthones could derive fluorescent materials. (C) 2012 Elsevier Ltd. All rights reserved.