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首页> 外文期刊>Crystal growth & design >Two-Dimensional Silver-Thiocyanate Layers Directed by Viologens: Structural Transformations upon Low Pressure Stimuli, Piezochromic Luminescence, Photocurrent Responses, and Photocatalytic Properties
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Two-Dimensional Silver-Thiocyanate Layers Directed by Viologens: Structural Transformations upon Low Pressure Stimuli, Piezochromic Luminescence, Photocurrent Responses, and Photocatalytic Properties

机译:由Viologens指导的二维银 - 硫氰酸盐层:低压刺激,压束发光,光电流反应和光催化性能的结构转化

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摘要

The reactions of AgSCN with excess KSCN in the presence of linear viologens templates afford seven new hybrids, {(MV)[Ag-4(SCN)(6)]}(n) (1), {(MV)[Ag-2(SCN)(4)]}(n) (2), {(EV)[Ag-4(SCN)(6)](n) (3), {(EV)[Ag-2(SCN)(4)]}(n) (4), {(BV)[Ag-4(SCN)(6)]}(n) (5), {(CMV)[Ag-2(SCN)(4)]}(n) (6), and {(BMPE)[Ag-2(SCN)(4)]}(n) (7) (MV2+ = methyl viologen, EV2+ = ethyl viologen, BV2+ = benzyl viologen, CMV2+ = cyanomethyl viologen, BMPE2+ = 1,2-bis(N-methylpyridiniim-4-ypethane). The silverthiocyanate skeletons with the formula of [Ag-4(SCN)(6)](n)(2n-) and [Ag-2(SCN)(4)](n)(2n-) are the scarce representative examples of the twodimensional (2-D) polypseudorotaxane arrays penetrated (for 16) or intercalated (for 7) by viologen dications. Upon an external low pressure stimulus, the 2-D silver-thiocyanate layers penetrated by cations exhibit looser packing with longer Ag S(N) bond lengths, weaker charge transfer (CT) interactions, and larger cavities, but the contrary trend can be found on the compound with intercalated organic cations. Due to the strong CT interactions between viologens and silver-thiocyanate skeletons, the CTs can occur at room temperature. Interestingly, 7 represents typical reversible piezochromic luminescence behavior. In addition, they show excellent photocurrent responses and efficient photocatalytic degeneration performances on organic dyes. Finally, their band structures and density of states before and after compression based on density functional theory calculations were executed to correlate their properties.
机译:AGSCN在线性Viologens模板存在下具有过量的KSCn的反应提供七个新的杂交物,{(mV)[Ag-4(SCN)(6)]}(N)(1),{(MV)[Ag- 2(SCN)(4)]}(N)(2),{(EV)[Ag-4(SCN)(6)](N)(3),{(EV)[AG-2(SCN)( 4)]}(n)(4),{(bv)[ag-4(scn)(6)]}(n)(5),{(cmv)[ag-2(scn)(4)]} (n)(6),和{(BMPE)[Ag-2(SCN)(4)]}(N)(7)(MV2 + =甲基Viololgen,EV2 + =乙基Viololgen,Bv2 + =苄基Viololgen,CMV2 + =氰基甲基Viologen ,BMPE2 + = 1,2-BIS(N-甲基吡啶-4-丙烷)。银氰酸酯骨架具有[Ag-4(SCN)(6)](N)(2N-)和[Ag-2(SCN )(4)](2N)(2N-)是稀疏(2-D)息氨酸阵列的稀缺代表性实例(2-D)含有violologen datimes渗透(16)或嵌入(持续7)。在外部低压刺激上,由阳离子穿透的2-D银 - 硫氰酸酯层具有较长的Ag S(n)键长度,电荷转移(CT)相互作用和较大腔体,但在库中可以找到相反的趋势D与插入有机阳离子。由于Viologens和银 - 硫氰酸银骨架之间的强CT相互作用,CTS可以在室温下发生。有趣的是,7表示典型的可逆压力色调发光行为。此外,它们表明有机染料上具有优异的光电流反应和有效的光催化变性性能。最后,执行基于密度泛函理论计算的压缩前后状态的频带结构和密度,以关联它们的性质。

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  • 来源
    《Crystal growth & design》 |2019年第1期|共16页
  • 作者单位

    Fuzhou Univ Coll Chem Fuzhou 350116 Fujian Peoples R China;

    Fuzhou Univ Coll Chem Fuzhou 350116 Fujian Peoples R China;

    Fuzhou Univ Coll Chem Fuzhou 350116 Fujian Peoples R China;

    Fuzhou Univ Coll Chem Fuzhou 350116 Fujian Peoples R China;

    Fuzhou Univ Coll Chem Fuzhou 350116 Fujian Peoples R China;

    Fuzhou Univ Coll Chem Fuzhou 350116 Fujian Peoples R China;

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  • 正文语种 eng
  • 中图分类 晶体学;
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