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A series of anionic MOFs with cluster-based, pillared-layer and rod-spacer motifs: near-sunlight white-light emission and selective dye capture
CrystEngComm ( IF 2.6 ) Pub Date : 2019/12/17 , DOI: 10.1039/c9ce01691k
Ce Wang 1, 2, 3, 4, 5 , Zheng Yin 1, 2, 3, 4, 5 , Zhao Cheng 5, 6, 7, 8 , Wei-Min Ma 1, 2, 3, 4, 5 , Xi-Yao Li 1, 2, 3, 4, 5 , Xiao-Ting Hu 1, 5, 9, 10 , Rong Shi 1, 2, 3, 4, 5 , Ao-Wei Chen 1, 2, 3, 4, 5 , Yang-Min Ma 1, 2, 3, 4, 5
Affiliation  

Ionic MOFs are rare but function in an interesting manner due to charged frameworks and the existence of counter ions in the channels. Using one of the most simple and cheap ligands of benzene-1,3,5-tricarboxylic acid (H3btc), we constructed five novel anionic MOFs namely [Me2NH2][Cd(btc)]·0.5DMA·2H2O (1), [Me2NH2]2[Cd5(btc)2(lac)3(H2O)3]·4DMF (2, H2lac = 2-hydroxypropanoic acid), [Me2NH2][MnII(btc)]·DMA (3), [Me4N]3[MnII3(btc)2(Hbtc)(CH3COO)]·9CH3OH (4) and [Me2NH2]2[Zn5(btc)4(DMA)2]·5.5DMA (5). Rich structure variabilities including cluster-based, pillared-layer and rod-spacer motifs were found in these MOFs because of the different metal coordination and effect of auxiliary ligands. 1 was a [Cd2(COO)4]-based porous framework belonging to (3,6) connected α-PbO2 net. 2 was a [Cd(btc)]-layers and [Cd2(lac)2] pillar-based framework, which possessed rare-ordered defects due to the self-absence of 25% pillars. In 2, for the first time, extremely rare square-planar Cd(II) geometry in porous MOFs was found. 3 was the first 3D framework constructed from unusual Mn–carboxyl chains with [Mn2(COO)2] building blocks. 4 provided a new example to construct a pillared-layer framework from self-assembled metal–ligand chains as pillars. 5 had a [Zn2]-cluster-based framework with dual pore systems of 1D rounded channels and elongated cages. A new single-phase white-emitting phosphor of 1 was found, which exhibited near-sunlight and human vision friendly broadband spectrum, with extremely large full width at half maximum (FWHM) of up to 268 nm, close pure white chromaticity coordinates of (0.303–0.317, 0.354–0.364), near daylight color temperature of 5773–5899 K, as well as high color rendering index of 90. In comparison, 2, 3 and 4 showed single and narrow blue emission. Rapid and selective capture of methylene blue (MB) over methyl orange (MO) was realized in 1, while MB adsorption in other MOFs was negligible.

中文翻译:

一系列具有簇基,柱状层和杆状间隔物图案的阴离子MOF:近日白光发射和选择性染料捕获

离子MOF很少见,但由于带电框架和通道中抗衡离子的存在,其功能以有趣的方式发挥作用。使用最简单,最便宜的苯-1,3,5-三羧酸(H 3 btc)配体之一,我们构建了五个新颖的阴离子MOF,即[Me 2 NH 2 ] [Cd(btc)]·0.5DMA·2H 2 O(1),[Me 2 NH 2 ] 2 [Cd 5(btc)2(lac)3(H 2 O)3 ]·4DMF(2,H 2 lac = 2-羟基丙酸),[Me 2 NH 2 ] [锰II(btc)]·DMA( 3),[Me 4 N] 3 [Mn II 3(btc) 2(Hbtc)(CH 3 COO)]·9CH 3 OH( 4)和[Me 2 NH 2 ] 2 [ Zn 5(btc) 4(DMA) 2 ]·5.5DMA( 5)。由于不同的金属配位和辅助配体的作用,在这些MOF中发现了丰富的结构变异性,包括基于簇的,柱状层和杆状间隔基序。1是[Cd 2(COO) 4]属于(3,6)连接的α-PBO为基础的多孔框架2净。2是[Cd(btc)]层和[Cd 2(lac)2 ]柱基框架,由于自身不存在25%的柱,它们具有稀有缺陷。在2中,首次发现了多孔MOF中极为罕见的方形Cd(II)几何形状。3是第一个由具有[Mn 2(COO)2 ]构建块的不寻常的Mn-羧基链构建的3D框架。4提供了一个新的示例,以自组装的金属-配体链作为支柱来构建支柱层框架。5有一个[Zn 2基于]群集的框架,具有一维圆形通道和细长笼子的双孔系统。发现了一种新型的单相发白光荧光粉1,该荧光粉显示了近日光和人眼友好的宽带光谱,其最大半峰全宽(FWHM)高达268 nm,接近纯净的白色色度坐标为( 0.303-0.317,0.354-0.364),近日光色温度5773-5899的K,以及90.高显色指数相比较而言,234显示出单和缩小蓝色发光。在1中实现了对甲基橙(MO)的快速选择性捕获,而在其他MOF中MB的吸附可以忽略不计。
更新日期:2020-02-13
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