Radius-dependent assembly of complexes with the rigid unsymmetric ligand 5-(2-pyridyl)-1,3,4-oxadiazole-2-thione: Syntheses, structures and luminescence properties

Wang, Yongtao; Tang, Gui-Mei; Qiang, Zhen-Wei

doi:10.1016/j.poly.2007.06.026

Cited by 38 publications

(13 citation statements)

References 87 publications

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“…and 2.585(2) Â, are comparable to the distance of 2.623(2) A found in [Cd(L5)2]" (L5 = 5-(2-pyridyl)-l,3,4-oxadiazole-2-thione)[34]. The bond angles around Cd(II) range from 80.04(12) to 162 98 (11)°.Neighboring complex units are connected to assemble a 2-D lampshade-type layer structure.…”

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confidence: 75%

Two Cd(II) complexes derived from mercapto-triazole ligands: syntheses, crystal structures, and luminescent properties

Yang

et al. 2013

Journal of Coordination Chemistry

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Two cadmium complexes, {[Cd(a-ptt)(ptt)]-H2O¡,, (1) and [Cd(a-Hmtt)2(SO4)H2O]-CH3OH (2), have been prepared based on 4-amino-3-(4-pyridine)-5-mercapto-1,2,4-triazole (a-Hptt) and 4-amino-3-methyl-5-mercapto-1,2,4-triazole (a-Hmtt), respectively. In 1, amino-triazole ligand aHptt can partly be deaminated and transformed into 3-(4-pyridine)-5-mercapto-triazole (Hptt) under hydrothermal conditions. X-ray diffraction analysis reveals that I exhibits an unusual 2-D lampshade-type layer structure in which the amino ligand a-ptt and the deamination ligand ptt display eATo-tridentate bridging and bidentate bridging, respectively. Complex 2 is mononuelear and further assembled into a 3-D supramolecular architecture via non-covalent interactions. Complexes 1 and 2 were characterized by elemental analyses, IR, and thermogravimetric analyses. Furthermore, solidstate luminescent properties of 1 and 2 have also been investigated.

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confidence: 75%

Two Cd(II) complexes derived from mercapto-triazole ligands: syntheses, crystal structures, and luminescent properties

Yang

et al. 2013

Journal of Coordination Chemistry

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“…In a similar vein, Wang and co-workers showed that observation of either LMCT or linker-based luminescence depends on the metal ion radius and coordination geometry in MOFs containing Cd(II), Zn(II), and Hg(II) and the linker 5-(2-pyridyl)-1,3,4-oxadiazole-2-thione. 46…”

Section: S-n-(phosphonomethyl)prolinementioning

confidence: 99%

Luminescent metal–organic frameworks

et al. 2009

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Metal-organic frameworks (MOFs) display a wide range of luminescent behaviors resulting from the multifaceted nature of their structure. In this critical review we discuss the origins of MOF luminosity, which include the linker, the coordinated metal ions, antenna effects, excimer and exciplex formation, and guest molecules. The literature describing these effects is comprehensively surveyed, including a categorization of each report according to the type of luminescence observed. Finally, we discuss potential applications of luminescent MOFs. This review will be of interest to researchers and synthetic chemists attempting to design luminescent MOFs, and those engaged in the extension of MOFs to applications such as chemical, biological, and radiation detection, medical imaging, and electro-optical devices (141 references).

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“…We can find that MOF-5 with similar ionic radius has a similar fluorescence effect as UiO-66, which is different from the fluorescence effect of MIL-101 (Cr) with a smaller ion radius. Similarly, Wang and colleagues found that the observation of LMCT or linker luminescence depends on the metal ion radius in transition metal-containing MOFs [21] . Therefore, it is speculated that when the organic ligands are the same, the radius of the transition metal ions plays an important role in the luminescence of the MOF.…”

Section: Luminescence Propertiesmentioning

confidence: 88%

Effect of transition metal ions on luminescence of MOFs

Ruan

Liu

et al. 2018

MATEC Web Conf.

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Three kinds of metal-organic framework materials (MOF-5, MLI-101(Cr), UiO-66) are synthesized, which are based on transition metal (Zn, Cr, Zr) as the center ions, and terephthalic acid (H2BDC) as organic ligand. At the same time, three kinds of MOFs were characterized and analyzed with X-ray diffraction (XRD), scanning electron microscopy (SEM), UV-visible absorption spectrometer (UV-Vis), and fluorescence spectrometer (PL). This article analyzes the fluorescence effects of these three MOFs and investigates the role of different transition metal ions in MOF luminescence. The results show that the ionic radii of Zn2 + and Zr4 + are similar, which are 0.074 nm and 0.072 nm, respectively. MOF-5 and UiO-66 have similar fluorescence effects, both of which emit blue-violet light. However, MIL-101 (Cr) fluorescence centers on Cr3 + with an ionic radius of 0.0651 nm emits yellow-green light, which is different from the foregoing MOFs. Therefore, the ionic radius of the transition metal has an important effect on the fluorescence effect of the MOF. For larger ionic radii, the fluorescence of MOF is generally in the blue-violet square region.

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Radius-dependent assembly of complexes with the rigid unsymmetric ligand 5-(2-pyridyl)-1,3,4-oxadiazole-2-thione: Syntheses, structures and luminescence properties

Cited by 38 publications

References 87 publications

Two Cd(II) complexes derived from mercapto-triazole ligands: syntheses, crystal structures, and luminescent properties

Two Cd(II) complexes derived from mercapto-triazole ligands: syntheses, crystal structures, and luminescent properties

Luminescent metal–organic frameworks

Effect of transition metal ions on luminescence of MOFs

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