کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1230106 | 1495218 | 2015 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Syntheses, crystal structures, weak interaction, magnetic and photoluminescent properties of two new organic–inorganic molecular solids with disubstituted benzyl triphenylphosphinium and tetra(isothiocyanate)cobalt(II) anion Syntheses, crystal structures, weak interaction, magnetic and photoluminescent properties of two new organic–inorganic molecular solids with disubstituted benzyl triphenylphosphinium and tetra(isothiocyanate)cobalt(II) anion](/preview/png/1230106.png)
• Two molecular solids containing [Co(NCS)4]2− dianion were synthesized and characterized.
• The cations form a column through the C–H⋯π, π⋯π or Cl⋯π interactions.
• The anion and the cation are linked by C–H⋯S hydrogen bonds and Cl⋯S interactions.
• Both two molecular solids show an ultraviolet fluorescence emission at room temperature.
• Two molecular solids show a weak antiferromagnetic coupling behavior up the temperature is lowered.
Two new organic–inorganic molecular solids of tetra(isothiocyanate)cobalt(II) dianion and disubstituted benzyl triphenylphosphinium, [2Cl4FBzTPP]2[Co(NCS)4] (1) and [2Cl4ClBzTPP]2[Co(NCS)4] (2) ([2Cl4FBzTPP]+ = 1-(2′-chloro-4′-fluorobenzyltriphenylphosphonium) and [2Cl4ClBzTPP]+ = 1-(2′,4′-dichlorobenzyltriphenylphosphonium), were synthesized and characterized by elemental analysis, FT-IR, UV–Vis spectra, ESI-MS and single crystal X-ray diffraction method. Compounds 1 and 2 crystallize in the monoclinic Pc and triclinic P-1, respectively. The Co(II) ion of the [Co(NCS)4]2− anion shows a distorted tetrahedral coordination geometry. The [2Cl4FBzTPP]+ cations containing P(2) atoms in 1 form a column by the Cl⋯π interactions, while the [2Cl4ClBzTPP]+ cations in 2 form two columns by the C–H⋯π and π⋯π interactions. The anion and the cation are linked by C–H⋯S hydrogen bonds and Cl⋯S interactions. Magnetic susceptibility measurement in the temperature range 2–300 K shows that both 1 and 2 exhibit a weak antiferromagnetic exchange interaction as the temperature falls, and ultraviolet fluorescence emission in the solid state at room temperature.
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Journal: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy - Volume 151, 5 December 2015, Pages 490–497