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A Zn based coordination polymer exhibiting long-lasting phosphorescence.

Javier Cepeda1, Eider San Sebastian2, Daniel Padro3

  • 1Applied Chemistry Department, Chemistry Faculty, University of the Basque Country (UPV/EHU), 20080 Donostia, Spain. javier.cepeda@ehu.eus josemanuel.seco@ehu.eus and Polymer Science and Technology Department, Chemistry Faculty, University of the Basque Country (UPV/EHU), 20080 Donostia, Spain.

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A novel zinc(II) coordination polymer displays time-dependent, multi-colored light emission. A portion of this emission is a persistent green phosphorescence, visible for seconds, arising from charge transfer processes.

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Area of Science:

  • Materials Science
  • Inorganic Chemistry
  • Photophysics

Background:

  • Coordination polymers (CPs) are advanced materials with tunable properties.
  • Luminescent CPs are of interest for optical applications.
  • Understanding emission mechanisms is crucial for material design.

Purpose of the Study:

  • To synthesize and characterize a new Zn(II)-based coordination polymer.
  • To investigate the luminescent properties of the synthesized material.
  • To elucidate the mechanisms behind its time-dependent emission and phosphorescence.

Main Methods:

  • Synthesis of a Zn(II) coordination polymer.
  • Structural characterization of the 2D Shubnikov type layers.
  • Photoluminescence spectroscopy to study emission properties.
  • Time-resolved luminescence measurements to analyze phosphorescence decay.

Main Results:

  • A new Zn(II) coordination polymer with cohesive pilling of 2D layers was successfully synthesized.
  • The material exhibits time-dependent, multi-colored emission.
  • Persistent green phosphorescence, visible for up to two seconds, was observed.
  • Multiple charge transfer mechanisms were identified as the origin of the phosphorescence.

Conclusions:

  • The reported Zn(II) coordination polymer possesses unique time-dependent luminescent characteristics.
  • The observed persistent green phosphorescence is attributed to complex charge transfer dynamics.
  • This material shows potential for applications in areas requiring long-lived luminescence.