A functional indium-organic framework with an anionic skeleton, [(CH₃)₂NH₂][In(BDCPPI)]·0.5DMF·H₂O (compound 1, H₄BDCPPI = N,N′-bis(3,5-dicarboxyphenyl)pyromellitic diimide, DMF = N,N-dimethylformamide), has been solvothermally synthesized. Compound 1 with a (4, 4)-connected pts network is constructed by negative [In(OOC)₄]⁻ secondary building units (SBUs) and expanded tetracarboxylate ligands with functional imide groups. Meanwhile, the overall framework possesses large open channels of 17.3 × 5.5 Å with a high solvent-accessible volume that occupied about 69.2% of the total cell volume. Due to its anionic skeleton and imide-functional channels, compound 1 can efficiently adsorb large-sized carcinogenic Basic Red 9 (BR9) and Basic Violet 14 (BV14) under the synergetic promotion of Coulombic interaction, hydrogen bonding, and ion exchange and can display a repelling effect to anionic dyes. In addition, the maximum adsorption capacities for BR9 and BV14 are as high as 245 and 227 mg g^–1, respectively. With regard to series of mixtures with oppositely charged dyes, compound 1 can selectively trap carcinogenic dyes. Therefore, compound 1 should be a promising metal–organic framework (MOF)-based material for the efficient and selective adsorption of carcinogenic dyes.

中文翻译：

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酰亚胺修饰的铟-有机骨架，可有效地和选择性地捕获具有多种吸附相互作用的致癌染料

具有阴离子骨架的功能性铟有机骨架，[（CH ₃）₂ NH ₂ ] [In（BDCPPI）]·0.5DMF·H ₂ O（化合物1，H ₄ BDCPPI = N， N'-bis （3，溶剂热合成了5-二羧基苯基）均苯四甲酰亚胺（DMF = N，N-二甲基甲酰胺）。具有（4，4）连接的pts网络的化合物1由负[In（OOC）₄ ]构成^-二级结构单元（SBU）和带有功能性酰亚胺基团的膨胀四羧酸酯配体。同时，整个框架拥有17.3×5.5Å的大型开放通道，具有高溶剂可及体积，约占电池总体积的69.2％。由于其阴离子骨架和酰亚胺官能团通道，化合物1在库仑相互作用，氢键和离子交换的协同促进下，可以有效吸附大型致癌的碱性红9（BR9）和碱性紫14（BV14）。对阴离子染料具有排斥作用。此外，BR9和BV14的最大吸附容量分别高达245和227 mg g ^–1。关于带有相反电荷的染料的一系列混合物，化合物1可以选择性地捕获致癌染料。因此，化合物1应该是一种有前途的基于金属-有机骨架（MOF）的材料，可以有效而选择性地吸附致癌染料。