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首页> 外文期刊>Crystal growth & design >Luminescent Triazene-Based Covalent Organic Frameworks Functionalized with Imine and Azine: N-2 and H-2 Sorption and Efficient Removal of Organic Dye Pollutants
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Luminescent Triazene-Based Covalent Organic Frameworks Functionalized with Imine and Azine: N-2 and H-2 Sorption and Efficient Removal of Organic Dye Pollutants

机译：用亚胺和三嗪的致荧光三亚乙烯的共价有机框架：N-2和H-2吸附，有效地去除有机染料污染物

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摘要

Design of adsorbents with high stability and efficiency to achieve rapid uptake and high capacity for dye pollutants is a key challenge in environmental remedies. Herein, we have design and synthesized three triazene-based imine and azine functionalized covalent organic frameworks (COFs 1-3) via the formation of imine bonds by the condensation of a flexible tripodal tri aldehyde (TFPT) with linear diamines. The COFs are characterized by elemental analysis, FTIR, solid-state NMR, TGA, FESEM, TEM, and DRS. They exhibit permanent porosity with high surface areas and N-2 uptake capacities of 540, 1600, and 2235 cc/g by COFs 1-3, respectively. They are found to be chemically and thermally stable and exhibit moderate hydrogen storage capacities. Photophysical studies reveal that COFs 1-3 exhibited low band gap values of 3.0, 2.5, and 2.25 eV, respectively, indicating their semiconducting nature. All three materials are highly luminescent, and their emission maxima are found to depend on the nature of the diamine linker. Further, COFs 1-3 are highly stable in water and function as robust adsorbents, as evidenced by their high rapid uptake capacity (96%) toward anionic (MO, CR) and cationic (MB, CV) organic dye pollutants from their respective aqueous solutions (2.5 x 10(-5) M).
机译：具有高稳定性和效率的吸附剂设计，以实现快速摄取和染料污染物的高容量是环境补救措施的关键挑战。在此，我们通过用线性二胺的柔性三架子三醛（TFPT）的缩合形成亚胺键，通过形成亚胺键来设计和合成三亚亚胺基亚胺和氮杂官能化的共价有机骨架（COF 1-3）。 COF的特征在于元素分析，FTIR，固态NMR，TGA，FESEM，TEM和DRS。它们分别表现出具有高表面积和540,1600和2235cc / g的高表面积和N-2摄取容量的永久性孔隙率，COF 1-3。发现它们是化学和热稳定的并且表现出适度的储氢能力。光物理研究表明，COF 1-3分别显示出3.0,2.5和2.25eV的低带隙值，表明其半导体性质。所有三种材料都是高发光的，发现它们的发射最大值依赖于二胺连接物的性质。此外，COF 1-3在水中具有高度稳定的稳定性，用作鲁棒的吸附剂，如它们的高快速摄取能力（＆ 96％）对阴离子（MO，Cr）和阳离子（MB，CV）有机染料污染物的高度快速摄取能力（＆ 96％）所证明的各自的水溶液（2.5×10（-5）m）。

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