Synthesis and crystal structure of a 3-D Ag⁺ coordination polymer with white-light emission

Lin-Li HU, Chang SHEN, Jing XIANG, Chi Fai LEUNG

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Abstract

Treatment of AgNO₃ with a tetrazolyl ligand H₂L₁ afforded a 3-D coordination polymer [Ag₂(L¹)]n (1). The crystal structure was determined by X-ray crystallography and it shows that both Ag1 and Ag2 atoms in the asymmetric unit exhibit distorted tetrahedron geometries, which are modified by Ag⋯Ag interactions. The flexible methylene –CH₂– linkage between tetrazolate and phenyl ring effectively reduces the steric strain in the resultant 3D-framework. L¹ exhibits an unsual coordination mode in which all nitrogen atoms in the two tetrazolato units are coordinated to the Agᴵ centers. The luminescent property of 1 was also investigated. It exhibits multiple emission bands; the high energy emission band is assigned to the ligand-centered π⋯π transition, while the low energy emission bands are tentatively assigned to ligand-to-metal charge transfer (LMCT) that are modified by Ag⋯Ag interaction. The independence of the chromaticity coordinates of 1 on the excitation wavelength also suggests that it is a potentially useful single–component white-light-emitting material. Copyright © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Original languageEnglish
Article number1700017
JournalCrystal Research and Technology
Volume52
Issue number4
DOIs
Publication statusPublished - Apr 2017

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Light emission
coordination polymers
light emission
Polymers
Crystal structure
Ligands
ligands
crystal structure
synthesis
Atoms
X ray crystallography
methylene
linkages
tetrahedrons
nitrogen atoms
crystallography
Charge transfer
Nitrogen
Metals
charge transfer

Citation

Hu, L.-L., Shen, C., Xiang, J., & Leung, C.-F. (2017). Synthesis and crystal structure of a 3-D Ag⁺ coordination polymer with white-light emission. Crystal Research and Technology, 52(4), Article 1700017. Retrieved July 18, 2017, from http://dx.doi.org/10.1002/crat.201700017

Keywords

  • Ag(I)
  • White-light emitter
  • Metal-metal interactions
  • MOFs