Mixed d−f<sub>3</sub> Coordination Complexes Possessing Improved Near-Infrared (NIR) Lanthanide Luminescent Properties in Aqueous Solution
作者:Aline M. Nonat、Clémence Allain、Stephen Faulkner、Thorfinnur Gunnlaugsson
DOI:10.1021/ic1010852
日期:2010.9.20
monometallic analogues Ln·1 (Ln = Nd(III), Yb(III)), we demonstrate that our new design possesses an enhanced sensitization efficiency for lanthanide metal centered sensitization upon using the [Ru(phen)3] moiety (d → f energy transfer) as a visibly exciting antenna, and we demonstrate that the intensity of the Ru(II)-based luminescence strictly correlates to the efficiency of the d → f energy transfer processes
具有[1,10]-菲咯啉部分作为侧链的基于Cyclon的配体1已被用作对位d配体,用于d和近红外(NIR)发射(和)f-金属离子的络合。该配体与镧系离子如Ln = ,、钕和(形成为不发射IR的参考化合物)形成动力学稳定的络合物1·Ln,其合成和光物理性质在此进行了详细描述。然后将这些1·Ln络合物用作构建混合d-f杂多金属自组装体的基础,其中phen部分用于络合钌(Ru(II))离子,得到df 3络合物Ru ·Ln 3(Ln = Nd(III),Yb(III),Lu(III))。通过吸收和发光光谱研究了这些超分子配位缀合物的形成,同时通过1 H NMR在D 2 O和H 2 O中阐明了Ru·Lu 3的溶液结构。在这些缀合物中,Ru·Nd 3均如此。和钌·镱3显示在H成强烈NIR发射2在pH7.4(带O Q镱大号= 0.073%和Q的Nd大号= 0.040%),并在d 2 O(与Q镱大号= 0