Frontier orbitals of photosubstitutionally active ruthenium complexes: an experimental study of the spectator ligands’ electronic properties influence on photoreactivity
作者:Hyo Jin Jang、Samantha L. Hopkins、Maxime A. Siegler、Sylvestre Bonnet
DOI:10.1039/c7dt01540b
日期:——
characterization of [Ru(tpy)(R2bpy)(L)](X)n complexes (tpy = 2,2′:6′,2′′-terpyridine, R2bpy = 4,4′-dimethyl-2,2′-bipyridine (dmbpy), or 4,4′-bis(trifluoromethyl)-2,2′-bipyridine (tfmbpy), X = Cl− or PF6−, and n = 1 or 2) are described. The dmbpy and tfmbpy bidentate ligands allow for investigating the effects of electron-donating and electron-withdrawing ligands, respectively, on the frontier orbital energetics
[Ru(tpy)(R 2 bpy)(L)](X)n配合物的合成与表征(tpy = 2,2':6',2'-terpyridine,R 2 bpy = 4,4'-二甲基-2,2'-联吡啶(dmbpy),或4,4'-双(三氟甲基)-2,2'-联吡啶(tfmbpy),X =氯-或PF 6 - ,和ñ = 1或2)是描述。的dmbpy和tfmbpy二齿配体允许分别调查供电子和吸电子配体,的影响,在前线轨道能量学以及这些钌多吡啶配合物的五个典型单齿的光反应性配位体L =氯-,H 2 O,CH 3CN,2-(甲硫基)乙醇(Hmte)或吡啶。根据光谱和电化学研究,dmbpy类似物在比tfmbpy类似物更高的能量下显示出单重态金属到配体的电荷转移(1 MLCT)跃迁。1的移位MLCT获得更高的能量是由于基于tpy的dmbpy类似物的最低未占用分子轨道(LUMO),而对于tfmbpy类似物的轨道反转发生了,从