Journal ArticleDOI
Coordination-modulated piezochromism in metal–viologen materials
TLDR
In this paper, the first piezochromic metal-viologen material and the modulation of the pressure-responsive behavior through coordination structures were presented by means of ultraviolet-visible spectroscopy, X-ray photoelectron spectrogrammy, electron paramagnetic resonance, in situ/ex situ Xray diffraction and DFT calculations.Abstract:
While stimuli-responsive chromic phenomena are well known for various viologen-containing organic and metal–organic materials, viologen-based piezochromism is a very recent discovery in organic compounds. Here we present the first piezochromic metal–viologen material and the modulation of the pressure-responsive behavior through coordination structures. By means of ultraviolet-visible spectroscopy, X-ray photoelectron spectroscopy, electron paramagnetic resonance, in situ/ex situ X-ray diffraction and DFT calculations, we demonstrated that a zigzag-chain CdII coordination polymer (1) with a viologen-dicarboxylate zwitterionic ligand shows reversible piezochromism, with modulations in threshold pressure and visible-light absorption (color) compared with the free ligand. We also illustrated that piezochromism can be suppressed upon coordination of the same ligand in a rigid 3D framework with the same metal ion. Two basic requirements were proposed from viologen-based piezochromism: appropriate donor–acceptor contacts providing electron transfer pathways, and structural flexibility allowing pressure to further reduce the contacts. We expect great prospects in tuning piezochromism and designing new pressure-responsive materials through diverse metal–viologen combinations. The very fast photochromic response of compound 1 at ambient pressure was also studied, which was attributed to the rather short donor–acceptor contacts in the structure.read more
Citations
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Journal ArticleDOI
Differentiable Detection of Volatile Amines with a Viologen-Derived Metal-Organic Material.
TL;DR: In this article, it is demonstrated for the first time that a degree of discriminative detection of alkylamines can be achieved by a metal-organic coordination material.
Journal ArticleDOI
Versatile and Switchable Responsive Properties of a Lanthanide-Viologen Metal-Organic Framework.
Teng Gong,Qi Sui,Peng Li,Xian-Fu Meng,Li-Jiao Zhou,Jinquan Chen,Jianhua Xu,Lin Wang,En-Qing Gao +8 more
TL;DR: The impacts of water and anions on ET are justified by the high polarity and hydrogen-bonding capability of water, the different electron donor strength of anions, and the strong I- -viologen CT interactions.
Journal ArticleDOI
Three viologen-derived Zn-organic materials: photochromism, photomodulated fluorescence, and inkless and erasable prints
TL;DR: Three zinc-viologen compounds, constructed from aromatic carboxylic acid and viologen-derived ligands, display photochromic properties from pale yellow to dark blue after being irradiated by a xenon lamp with different photoresponsive rates.
Journal ArticleDOI
Modulating Excitation Energy of Luminescent Metal–OrganicFrameworks for Detection of Cr(VI) in Water
TL;DR: Luminescent metal-organic frameworks (LMOFs) are newly emerged sensory materials, but rational design of LMOFs for specific analytes still faces many challenges for lack of sufficient knowledge as mentioned in this paper.
Journal ArticleDOI
A novel photochromic metal-organic framework with good anion and amine sensing.
TL;DR: The luminescence properties of 1 were investigated, and the results suggested that 1 has good properties of detecting dichromate ions, and can be applied to practical applications as a multifunctional detector against light and chemicals.
References
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Andreas Schneemann,Volodymyr Bon,Inke Schwedler,Irena Senkovska,Stefan Kaskel,Roland A. Fischer +5 more
TL;DR: Advances in flexible and functional metal-organic frameworks (MOFs), also called soft porous crystals, are reviewed by covering the literature of the five years period 2009-2013 with reference to the early pertinent work since the late 1990s.
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Journal ArticleDOI
Piezochromic Luminescence Based on the Molecular Aggregation of 9,10-Bis((E)-2-(pyrid-2-yl)vinyl)anthracene†
Yujie Dong,Bin Xu,Jibo Zhang,Xiao Tan,Lijuan Wang,Jinlong Chen,Hongguang Lv,Shanpeng Wen,Bao Li,Ling Ye,Bo Zou,Wenjing Tian +11 more
TL;DR: An effective mechanism of piezochromic luminescence on the basis of the molecular aggregation state of 9,10-bis((E)-2-(pyrid-2-yl)vinyl)anthracene (BP2VA) is reported, which exhibited spectacular luminescent characteristics: grinding and the exertion of external pressure on the powder led to a change in its photoluminescence color from green to red.
Journal ArticleDOI
Hypersensitive dual-function luminescence switching of a silver-chalcogenolate cluster-based metal–organic framework
Ren-Wu Huang,Yong-Sheng Wei,Xi-Yan Dong,Xiao-Hui Wu,Chenxia Du,Shuang-Quan Zang,Thomas C. W. Mak,Thomas C. W. Mak +7 more
TL;DR: The work enriches the cluster-based metal-organic framework portfolio, bridges the gap between silver chalcogenide/chalcogenolate clusters and metal- organic frameworks, and provides a foundation for further development of functional silver-cluster-based materials.