Suppr超能文献

主客体相互作用决定了一种发光轻质金属有机框架对液体炸药的选择性吸附和荧光猝灭。

Host-guest interaction dictated selective adsorption and fluorescence quenching of a luminescent lightweight metal-organic framework toward liquid explosives.

作者信息

Liu Dan, Liu Xiaojuan, Liu Yongxin, Yu Yang, Chen Fanglin, Wang Cheng

机构信息

State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, P.R. China.

出版信息

Dalton Trans. 2014 Oct 28;43(40):15237-44. doi: 10.1039/c4dt01883d. Epub 2014 Sep 4.

Abstract

In this article, we report the successful preparation of a Mg-based luminescent MIL-53 metal-organic framework (MOF), namely [Mg2(BDC)2(BPNO)]·2DMF (1) (BDC = 1,4-benzene dicarboxylate, BPNO = 4,4'-dipyridyl-N,N'-dioxide, DMF = N,N-dimethylformamide) in a mixed solvent containing a 2 : 3 volume ratio of DMF and ethanol (EtOH) under solvothermal conditions. Desolvated compound 1a can be used as an absorbent for selective adsorption and separation of liquid explosives, including nitroaromatic (nitrobenzene (NB)) and nitroaliphatic (nitromethane (NM) and nitroethane (NE)) compounds, through single crystal-to-single crystal (SC-SC) transformations. As one of the weakly luminescent MOFs, the luminescence of compound 1a could be quenched by the incorporation of the three liquid nitro explosives. On the basis of single crystal analysis, we provide direct evidence that both the selective adsorption and fluorescence quenching of the desolvated compound 1a are dictated by host-guest interactions between guest liquid explosives and the host framework. Such findings differ from those reported in previous works, which were dominated by surficial close contact interactions. Moreover, based on the experimentally obtained single-crystal structures, we explain that the luminescence of 1a follows the intraligand π*→π emission states or weak ligand to ligand charge transfer (LLCT), with little incorporation of intraligand charge transfer (ILCT).

摘要

在本文中,我们报道了在溶剂热条件下,于含有体积比为2∶3的N,N-二甲基甲酰胺(DMF)和乙醇(EtOH)的混合溶剂中,成功制备出一种镁基发光金属有机框架材料(MOF),即[Mg₂(BDC)₂(BPNO)]·2DMF(1)(BDC = 1,4-苯二甲酸,BPNO = 4,4'-联吡啶-N,N'-二氧化物,DMF = N,N-二甲基甲酰胺)。脱溶剂后的化合物1a可作为吸收剂,通过单晶到单晶(SC-SC)转变,用于选择性吸附和分离液体炸药,包括硝基芳烃(硝基苯(NB))和硝基脂肪烃(硝基甲烷(NM)和硝基乙烷(NE))化合物。作为弱发光的MOF之一,化合物1a的发光可通过掺入三种液态硝基炸药而猝灭。基于单晶分析,我们提供了直接证据,表明脱溶剂后的化合物1a的选择性吸附和荧光猝灭均由客体液体炸药与主体框架之间的主客体相互作用决定。这些发现与先前报道的主要由表面紧密接触相互作用主导的研究结果不同。此外,基于实验获得的单晶结构,我们解释了1a的发光遵循配体内π*→π发射态或弱的配体间电荷转移(LLCT),几乎没有配体内电荷转移(ILCT)的掺入。

文献AI研究员

20分钟写一篇综述,助力文献阅读效率提升50倍。

立即体验

用中文搜PubMed

大模型驱动的PubMed中文搜索引擎

马上搜索

文档翻译

学术文献翻译模型,支持多种主流文档格式。

立即体验