Stomeo Floriana, Lincheneau Christophe, Leonard Joseph P, O'Brien John E, Peacock Robert D, McCoy Colin P, Gunnlaugsson Thorfinnur
School of Chemistry, Center for Synthesis and Chemical Biology, Trinity College Dublin, Dublin 2, Ireland.
J Am Chem Soc. 2009 Jul 22;131(28):9636-7. doi: 10.1021/ja9032204.
The synthesis and photophysical evaluation of two enatiomerially pure dimetallic lanthanide luminescent triple-stranded helicates is described. The two systems, formed from the chiral (R,R) ligand 1 and (S,S) ligand 2, were produced as single species in solution, where the excitation of either the naphthalene antennae or the pyridiyl units gave rise to Eu(III) emission in a variety of solvents. Excitation of the antennae also gave rise to circularly polarized Eu(III) luminescence emissions for Eu(2):1(3) and Eu(2):2(3) that were of equal intensity and opposite sign, confirming their enantiomeric nature in solution providing a basis upon which we were able to assign the absolute configurations of Eu(2):1(3) and Eu(2):2(3).
本文描述了两种对映体纯的双金属镧系发光三链螺旋配合物的合成及光物理评估。由手性（R，R）配体1和（S，S）配体2形成的这两种体系在溶液中以单一物种形式产生，其中萘天线或吡啶基单元的激发在多种溶剂中均产生铕（III）发射。天线的激发还导致Eu(2):1(3)和Eu(2):2(3)产生强度相等且符号相反的圆偏振铕（III）发光发射，证实了它们在溶液中的对映体性质，这为我们能够确定Eu(2):1(3)和Eu(2):2(3)的绝对构型提供了依据。
