A phosphorescent copper(I) coordination polymer with the sodium salt of 3,5-dimethyl-4-sulfonate pyrazole (HLNa) has been prepared and structurally characterized. The presence of the SO3Na substituent in position 4 of the pyrazole ring led to a 3D polymeric species in which an organic/inorganic/organic sandwich motif is observed and repeated along the a axis through zig-zag chains of linear coordinated Cu(I) ions. The inorganic core of the sandwich consists of a trapezoidal grid of Na-ions interconnected by μ-(κO;κ2-O′,O″)-bridging sulfonates and bridging water molecules; H-bonds can be also found between water molecules and SO3− groups. In the solid state, the copper derivative showed an interesting phosphorescent behavior when irradiated with UV light, with a yellow emission (570 nm) and a good absolute quantum yield (ΦPL = 0.44), together with a remarkable Stokes shift of 2.50 eV.

A phosphorescent copper(i) coordination polymer with sodium 3,5-dimethyl-4-sulfonate pyrazolate

ARDIZZOIA, GIAN ATTILIO;BRENNA, STEFANO;
2017-01-01

Abstract

A phosphorescent copper(I) coordination polymer with the sodium salt of 3,5-dimethyl-4-sulfonate pyrazole (HLNa) has been prepared and structurally characterized. The presence of the SO3Na substituent in position 4 of the pyrazole ring led to a 3D polymeric species in which an organic/inorganic/organic sandwich motif is observed and repeated along the a axis through zig-zag chains of linear coordinated Cu(I) ions. The inorganic core of the sandwich consists of a trapezoidal grid of Na-ions interconnected by μ-(κO;κ2-O′,O″)-bridging sulfonates and bridging water molecules; H-bonds can be also found between water molecules and SO3− groups. In the solid state, the copper derivative showed an interesting phosphorescent behavior when irradiated with UV light, with a yellow emission (570 nm) and a good absolute quantum yield (ΦPL = 0.44), together with a remarkable Stokes shift of 2.50 eV.
2017
copper(I), pyrazole, phosphorescence, PXRD,Stokes shift
Ardizzoia, GIAN ATTILIO; Brenna, Stefano; Civati, Francesco; Colombo, Valentina; Sironi, Angelo
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11383/2065818
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