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Two Anthracene-Based Ir(III) Complexes [Ir(pbt)2(aip)]Cl and [Ir(pbt)2(aipm)]Cl: Relationship between Substituent Group and Photo-oxidation Activity as Well as Photo-oxidation-Induced Luminescence
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2020-11-10 , DOI: 10.1021/acs.inorgchem.0c02279
Qin-Zhen Yuan 1 , Qianwenhao Fan 1 , Hang Lv 1 , Wen-Wen Chen 1 , Xue-Xiao Yang 1 , Deng-Ke Cao 1 , Jing Wen 2
Affiliation  

Two anthracene-based complexes [Ir(pbt)2(aip)]Cl (1) and [Ir(pbt)2(aipm)]Cl (2) have been synthesized based on the ligands aip = 2-(9-anthryl)-1H-imidazo[4,5-f][1,10]phenanthroline, aipm = 2-(9-anthryl)-1-methyl-imidazo[4,5-f][1,10]phenanthroline, and pbtH = 2-phenylbenzothiazole in order to explore both the influence of the substituent group R1 (R1 = H in 1 and CH3 in 2) on photo-oxidation activity and photo-oxidation-induced luminescence. Both 1H NMR spectra and ES mass spectra indicate that the anthracene moiety in complex 1 can be oxidized at room temperature upon irradiation with 365 nm light. Thus, this complex shows photo-oxidation-induced turn-on yellow luminescence. Compared to 1, complex 2 incorporates an R1 = CH3 group, resulting in very weak photo-oxidation activity. On the basis of experimental results and quantum chemical calculation, we report the differences between 1 and 2 in both photo-oxidation behavior and the related luminescence modulation and discuss the relationship between photo-oxidation activity and substituent group R1 in these complexes.

中文翻译:

两种基于蒽的Ir(III)配合物[Ir(pbt)2(aip)] Cl和[Ir(pbt)2(aipm)] Cl:取代基与光氧化活性以及光氧化诱导之间的关系发光性

基于配体aip = 2-(9-蒽基)合成了两个基于蒽的配合物[Ir(pbt)2(aip)] Cl(1)和[Ir(pbt)2(aipm)] Cl(2)。 -1 H-咪唑并[4,5- f ] [1,10]菲咯啉,aipm = 2-(9-蒽基)-1-甲基-咪唑并[4,5- f ] [1,10]菲咯啉和pbtH为了研究取代基R 1(R 1 = H in 1和CH 3 in 2)对光氧化活性和光氧化诱导的发光的影响,用2-苯基苯并噻唑= 2-苯基苯并噻唑。两者11 H NMR谱和ES质谱表明,配合物1中的蒽部分在室温下经365nm光照射可被氧化。因此,该络合物显示出光氧化诱导的开启黄色发光。与1相比,复合物2包含一个R 1 = CH 3基团,导致非常弱的光氧化活性。根据实验结果和量子化学计算,我们报道了12在光氧化行为和相关的发光调制方面的差异,并讨论了这些络合物中光氧化活性与取代基R 1之间的关系。
更新日期:2020-12-07
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