Fu Hong-Ru, Zhang Ruo-Yu, Ren Dan-Dan, Zhang Kun, Li Ting, Lu Xiao-Yan, Han Min-Le, Ma Lu-Fang
College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang, Henan 471934, P. R. China.
School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, P. R. China.
Inorg Chem. 2024 Sep 2;63(35):16284-16292. doi: 10.1021/acs.inorgchem.4c02223. Epub 2024 Aug 16.
Multicolor-tunable room-temperature phosphorescence (RTP) is attracting wide attention in optoelectronic applications. Here, we propose a coordination-oriented assembly approach to achieve wide-range RTP with a benzimidazole derivative (2,7-diazabenzimidazole, DZBIM) as a luminogen. These two compounds exhibit unexpected excitation-responsive RTP emission, and the phosphorescence emission nearly covers the entire visible region with the change of the excitation wavelength from 360 to 620 nm. To the best of our knowledge, this is the first report of coordination polymers with such a full-color-tunable RTP. Compound 1 also shows white-light emission upon excitation at 280 nm. Experimental and theoretical results demonstrate that multiple intermolecular interactions and emission centers from different aggregates are responsible for the generation of multicolor emission. The white-light emission and multiple anticounterfeiting are explored. Besides, compound 1 exhibits high antibacterial activity benefiting from efficient O generation. This work provides an efficient way to prepare a color-tunable RTP.
多色可调室温磷光（RTP）在光电应用中引起了广泛关注。在此，我们提出一种基于配位的组装方法，以苯并咪唑衍生物（2,7 - 二氮杂苯并咪唑，DZBIM）作为发光体来实现宽范围的RTP。这两种化合物表现出意想不到的激发响应RTP发射，并且随着激发波长从360 nm变化到620 nm，磷光发射几乎覆盖了整个可见光区域。据我们所知，这是首例具有如此全色可调RTP的配位聚合物报告。化合物1在280 nm激发时也显示出白光发射。实验和理论结果表明，多种分子间相互作用以及来自不同聚集体的发射中心是产生多色发射的原因。对白光发射和多重防伪进行了探索。此外，化合物1受益于高效的氧生成而表现出高抗菌活性。这项工作为制备颜色可调的RTP提供了一种有效方法。
