π–π Stacking assisted binding of aromatic amino acids by copper(<scp>ii</scp>)–aromatic diimine complexes. Effects of ring substituents on ternary complex stability
作者:Tatsuo Yajima、Reiko Takamido、Yuichi Shimazaki、Akira Odani、Yasuo Nakabayashi、Osamu Yamauchi
DOI:10.1039/b612394e
日期:——
have intramolecular pi-pi interactions between the Cu(ii)-coordinated aromatic ring moiety, Cu(DA) (Mpi), and the side chain aromatic ring of the AA (Lpi). The intensities of Mpi-Lpi interactions were evaluated by the stability constants of the ternary Cu(ii) complexes determined at 25 degrees C and I = 0.1 M (KNO(3)), which revealed that the stability enhancement of the Cu(DA)(AA) systems due to the interactions
包含芳族二亚胺(DA =二(2-吡啶基甲基)胺(dpa),4,4'-二取代的2,2'-联吡啶(Y(2)bpy; Y = H(bpy), Me,Cl,N(Et)(2),CONH(2)或COOEt)或2,2'-联嘧啶)和芳族氨基酸(AA = 1-苯丙氨酸(Phe),对位取代苯丙氨酸(XPhe; X用X射线衍射,分光光度法和电位计表征了NH(2),NO(2),F,Cl或Br),L-酪氨酸(Tyr),L-色氨酸(Trp)或L-丙氨酸(Ala))的特征测量。[Cu(dpa)(Trp)] ClO(4).2H(2)O和[Cu((CONH(2))(2)bpy)(Phe)] ClO(4).H(2)的结构固态的O被发现在Cu(ii)配位的芳环部分Cu(DA)(Mpi)和AA的侧链芳环(Lpi)之间具有分子内pi-pi相互作用。通过在25摄氏度和I = 0.1 M(KNO(3))下确定的三元Cu(ii)配合物的