Synthesis and Thermochromic Luminescence of Ag(I) Complexes Based on 4,6-Bis(diphenylphosphino)-Pyrimidine

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ID: 110704
2020
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Abstract
Two Ag(I)-based metal-organic compounds have been synthesized exploiting 4,6-bis(diphenylphosphino)pyrimidine (L). The reaction of this ligand with AgNO3 and AgBF4 in acetonitrile produces dinuclear complex, [Ag2L2(MeCN)2(NO3)2] (1) and 1D coordination polymer, [Ag2L(MeCN)3]n(BF4)2n (2), respectively. In complex 1, µ2-P,P′-bridging coordination pattern of the ligand L is observed, whereas its µ4-P,N,N′,P′-coordination mode appears in 2. Both compounds exhibit pronounced thermochromic luminescence expressed by reversible changing of the emission chromaticity from a yellow at 300 K to an orange at 77 K. At room temperature, the emission lifetimes of 1 and 2 are 15.5 and 9.4 µs, the quantum efficiency being 18 and 56%, respectively. On account of temperature-dependent experimental data, the phenomenon was tentatively ascribed to alteration of the emission nature from thermally activated delayed fluorescence at 300 K to phosphoresce at 77 K.
Reference Key
artem’ev2020inorganicssynthesis Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Alexander V. Artem’ev;Maria P. Davydova;Alexey S. Berezin;Denis G. Samsonenko;Artem’ev, Alexander V.;Davydova, Maria P.;Berezin, Alexey S.;Samsonenko, Denis G.;
Journal inorganics
Year 2020
DOI
10.3390/inorganics8090046
URL
https://doi.org/10.3390/inorganics8090046
Keywords
luminescence thermally activated delayed fluorescence phosphorescence ag(i) complexes metal-organic coordination polymers pyrimidylphosphines

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