Scharf Austin B, Zheng Shao-Liang, Betley Theodore A
Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138, USA.
Dalton Trans. 2021 May 18;50(19):6418-6422. doi: 10.1039/d1dt00945a.
Several first-row transition metal complexes of the 1,9-bis(2',4',6'-triphenylphenyl)-5-mesityl dipyrrinato ligand and its tetrahalogenated analogues have been synthesized and their luminescence spectra obtained. The protonated ligands, as well as the Li(i), Mn(ii), Cu(i), Cu(ii), and Zn(ii) chelates show appreciable luminescence, despite the paramagnetism of the Mn(ii) and Cu(ii) ions. Fluorescence quantum yields (ΦF) as high as 0.67 were observed for the zinc complex. Luminescence was partially quenched by the introduction of heavy halogens to the backbone of the ligand, as well as by the introduction of paramagnetic metal ions. Room-temperature, solution state phosphorescence was observed from the halogenated dipyrrinato lithium salts, as well as from the non-halogenated Mn(ii) complex.
已合成了1,9-双(2',4',6'-三苯基苯基)-5-均三甲苯基二吡咯配体及其四卤代类似物的几种第一排过渡金属配合物，并获得了它们的发光光谱。尽管Mn(ii)和Cu(ii)离子具有顺磁性，但质子化配体以及Li(i)、Mn(ii)、Cu(i)、Cu(ii)和Zn(ii)螯合物仍显示出明显的发光。锌配合物的荧光量子产率(ΦF)高达0.67。通过在配体主链中引入重卤素以及引入顺磁性金属离子，发光被部分猝灭。从卤代二吡咯锂盐以及非卤代Mn(ii)配合物中观察到了室温下的溶液态磷光。
