A Polyaromatic Terdentate Binding Unit with Fused 5,6-Membered Chelates for Complexing s-, p-, d-, and f-Block Cations
作者:Thi Nhu Y Hoang、Marie Humbert-Droz、Thibault Dutronc、Laure Guénée、Céline Besnard、Claude Piguet
DOI:10.1021/ic400526j
日期:2013.5.6
5-membered chelate ring with a fused 6-membered chelate ring. It is designed to provide complexation properties intermediate between 2,2′;6′,2″-terpyridine (L1) (two fused 5-membered chelate rings) and 2,6-bis(azaindol-1-yl)pyridine (L6) (two fused 6-membered chelate rings). In polar organic solvents, L7 displays remarkable affinities for the successive fixation of two small univalent cations M = H+ or
聚芳族齿状配体6-(氮杂吲哚-1-基)-2,2′-联吡啶(L7)将一个5元螯合环与一个稠合的6元螯合环结合在一起。它旨在提供介于2,2'; 6',2''-吡啶(L1)(两个稠合的5元螯合环)和2,6-双(氮杂吲哚-1-基)吡啶(L6)之间的络合性质(两个稠合的6元螯合环)。在极性有机溶剂中,L7对于两个小的单价阳离子M = H +或Li +的连续固定显示出显着的亲和力,从而形成稳定的[M m(L7)] m +(m = 1-2)配合物。与M = Mg反应时2+或Zn 2+阳离子,金属所带的大正电荷密度导致两个配体的连续配合络合,从而产生[M(L7)n ] n +(n = 1-2)。对于小的Sc 3+,不可避免的痕量水有利于乙腈中毫摩尔浓度的质子化配体的形成,但是使用较大的Y 3+阳离子会导致[Y(L7)n ] n +(n = 1,2) ,其稳定常数log(β1,1 Y,L7)= 2.9(5)和log(β1