Electronic Spectra of Mono‐ and Dinuclear Complexes of Fully π‐Conjugated salphen Ligands Synthesized by Using 2,6‐Dihydroxynaphthalene Carbaldehydes
作者:Hirohiko Houjou、Takatoshi Motoyama、Koji Araki
DOI:10.1002/ejic.200801030
日期:2009.2
A series of mono- and dinuclear zinc(II), copper(II), nickel(II), and iron(III) complexes of novel salphen ligands were synthesized and spectroscopically characterized. The mononuclear ligand (H2L1) was synthesized from 2,6-dihydroxynaphthalene-1-carbaldehyde and an o-phenylenediamine; the dinuclear ligand (H4L2), which was not isolated, contains a 2,6-dihydroxynaphthalene-1,5-dicarbaldimine linkage
合成了一系列单核和双核的锌 (II)、铜 (II)、镍 (II) 和铁 (III) 配合物,并对其进行了光谱表征。单核配体 (H2L1) 由 2,6-二羟基萘-1-甲醛和邻苯二胺合成;未分离的双核配体 (H4L2) 包含一个 2,6-二羟基萘-1,5-二羰基二亚胺键,可在两个 Salphen 单元上扩展 π 共轭。通过受控的缩合反应序列,这些成分被构建成单核([ML1])或双核复合物([M2L2])。[M2L2] 复合物的 UV/Vis 光谱表现出的吸光度大约是 [ML1] 复合物的吸光度的两倍,以及 30-50 nm 的红移和相对于 [ML1] 光谱的低能量吸收边缘的显着扩展。配合物的光谱在不同区域显示出明显增强的峰,这取决于 M,这意味着 π 共轭延伸的影响不仅仅是由于简单的可加性。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim