Near-infrared (NIR) luminescent hetero-tetranuclear Zn2Ln2 (Ln = Nd, Yb or Er) complexes self-assembled from the benzimidazole-based HL and two rigid 4,4′-bipyridine ligands with different spacers
作者:Zhao Zhang、Weixu Feng、Peiyang Su、Han Liu、Yao Zhang、Zheng Wang、Tiezheng Miao、Xingqiang Lü、Daidi Fan、Wai-Kwok Wong、Richard A. Jones
DOI:10.1016/j.saa.2013.06.122
日期:2013.12
the benzimidazole-based ligand HL (HL = 2-(1H-benzo[d]imidazol-2-yl)-6-methoxyphenol) with Zn(OAc)2·2H2O, Ln(NO3)3·6H2O (Ln = Nd, Yb, Er or Gd) and 4,4′-bipyridine ligand (bpy, 4,4′-bipyridine or bpe, trans-bis(4-pyridyl)ethylene), two series of Zn2Ln2-arrayed complexes [Zn2Ln2(L)4(bpy)(NO3)6] (Ln = Nd, 1; Yb, 2; Er, 3 or Gd, 4) and [Zn2Ln2(L)4(bpe)(NO3)6] (Ln = Nd, 5; Yb, 6; Er, 7 or Gd, 8) were obtained
通过苯并咪唑基配体HL(HL = 2-(1H-苯并[d]咪唑-2-基)-6-甲氧基苯酚)与Zn(OAc)2 ·2H 2 O的自组装,得到Ln(NO 3)3 ·6H 2 O(Ln = Nd,Yb,Er或Gd)和4,4'-联吡啶配体(bpy,4,4'-联吡啶或bpe,反式-双(4-吡啶基)乙烯),两个系列Zn 2 Ln 2排列的配合物的数量[Zn 2 Ln 2(L)4(bpy)(NO 3)6 ](Ln = Nd,1 ; Yb,2 ; Er,3或Gd,4)和[Zn 2 Ln 2(L)4(bpe)(NO 3)6 ](Ln = Nd,5; Yb,6; Er,7或Gd,8)。其光物理性质的结果表明,Nd 3+,Yb 3+或Er 3+离子的特征近红外(NIR)发光已从混合HL和HL的激发态(1 LC和3 LC)中被敏化。配合物1 – 3和5 – 7中的联吡啶配体。而且,从联吡啶变化到BPE桥接对于整个