Synthesis, Characterization, and Photochromic Studies of Cyclometalated Iridium(III) Complexes Containing a Spironaphthoxazine Moiety
作者:Jie Liu、Alan Kwun-Wa Chan、Maggie Ng、Eugene Yau-Hin Hong、Nathan Man-Wai Wu、Lixin Wu、Vivian Wing-Wah Yam
DOI:10.1021/acs.organomet.9b00359
日期:2019.10.14
series of cyclometalated iridium(III) complexes has been designed and synthesized, and their photophysical, photochromic, and electrochemical properties have been studied. The X-ray crystal structure of complex 2 has been determined. The emission properties of the complexes have been shown to be readily perturbed through the modification of the electronic properties of the phenylpyridine ligand. With different
设计并合成了一系列环金属化铱(III)配合物,并研究了它们的光物理,光致变色和电化学性质。配合物2的X射线晶体结构已经确定。已经表明,通过改变苯基吡啶配体的电子性质,可以很容易地扰动配合物的发射性质。在铱(III)配合物的苯基吡啶配体上具有不同的取代基1(-H),2(-OMe),3(-CHO)和4(-CF 3),它们可以显示出强烈的3MLCT [dπ(Ir)→π*(二亚胺)]发光范围为530 nm至640 nm,跨越绿色到橙色区域。光谱分配也与电化学研究和DFT计算一致。此外,光致变色行为可以容易地通过在C改变取代基调制∧N配体,无需对螺恶嗪骨架进行繁琐的修饰。通过分析反向漂白反应的动力学特征,较少的富电子铱(III)配合物可以稳定具有较高活化势垒的部花青形式。这些研究不仅为控制这些Ir(III)配合物的通用发光行为的结构-性质关系提供了基本理解,而且为可见光驱动光开关的未来发展提供了分子设计的指导原则。