Dynamic neighbouring participation of nitrogen lone pairs on the chromogenic behaviour of trans-bis(salicylaldiminato)Pt(<scp>ii</scp>) coordination platforms
作者:Takumi Hashimoto、Kanako Fukumoto、Ngoc Ha-Thu Le、Tatsuya Matsuoka、Soichiro Kawamorita、Naruyoshi Komiya、Takeshi Naota
DOI:10.1039/c6dt04005e
日期:——
The participation of neighbouring nitrogen lone pairs in the chromogenic control of trans-bis(salicylaldiminato)Pt(II) platforms was examined, using newly designed Pt analogues bearing salicylaldehyde hydrazone ligands. A series of non-vaulted and vaulted Pt complexes (1–5) with salicylaldehyde hydrazones as trans-coordinated bidentate ligands were synthesized and characterized with regard to the chromogenic
使用新设计的带有水杨醛配体的Pt类似物,检查了相邻的氮孤对在反式双-(salicylaldiminato)Pt(II)平台的生色控制中的参与。一系列的非拱形和拱形Pt配合物(1-5)与水杨醛腙为反式配位的二齿配体被合成和表征相对于的发色行为反式-双(水杨醛)铂(II)协调平台。X射线衍射和2D NMR数据表明,在非拱形N-单甲基络合物1的情况下,,由于分子内氢键引起的构象固定,相邻的N(2)个孤对在d-π共轭的反式-bis(salicylaldiminato)Pt(II)平台中显着参与。相比之下,N,N-二甲基类似物2的孤对由于其高的构象迁移率,对d-π共轭的延伸贡献不大。发现配合物1-5在溶液状态下具有结构相关的发色性质,因此N-甲基,短拱形配合物1和3的吸收光谱相对于N,N-二甲基,长拱形类似物2和5表现出明显的七色移,其光谱与反式-bis(salicylaldiminato)Pt(I