Abstract

Chain-like uranyl-coordination polymer as a bright green light emitter for sensing and sunlight driven photocatalysis.
GOMEZ, G. E.; ONNA, D.; D'VRIES, R. F.; BARJA, B. C.; ELLENA, Javier; NARDA, G. E.; SOLER-ILLIA, G. J. A. A.
Abstract: A new uranyl-coordination polymer (UCP) has been solvothermally synthesized employing succinic acid and 1,10-phenanthroline (phen) as ligands. The obtained compound with the formula [(UO2)2(phen)(succ)0.5(OH)(O)4(µ3-O)(H2O)]·H2O (UNSL-1) is classified as 1D chains showing I0O1 connectivity. Also, the asymmetric unit is composed of two hepta-coordinated uranyl centers: U1 is surrounded by five oxygen atoms from succinate, while U2 is surrounded by two nitrogen atoms from phen and three oxygen atoms from succinate ([U1O7] and [U2N2O5]). The secondary-building unit (SBU) is composed of a sharing edge tetrameric cluster linked with a succinate ligand in the [-1 0 1] direction. Besides, the chains are reinforced by p-p stacking interactions between the aromatic rings of the phen molecules to conform a 2D supramolecular arrangement. Moreover, photoluminescence experiments show strong green emission consistent with uranyl crystalline materials. Photophysical characterization was completed via low-temperature measurements (77 K) and recording the decay emission for calculating the lifetime (tobs) value. Regarding its multifunctional properties, a cation-sensing performance was achieved showing selective quenching toward iron ions in aqueous media. Finally, UNSL-1 was tested as an efficient water photocatalyst for dye degradation under simulated sunlight irradiation, exhibiting promising results for organic-pollutant water remediation.
Journal of Materials Chemistry C
v. 8, n. 32, p. 11102-11109 + supplementary files - Ano: 2020
Fator de Impacto: 7,059
    @article={003004125,author = {GOMEZ, G. E.; ONNA, D.; D'VRIES, R. F.; BARJA, B. C.; ELLENA, Javier; NARDA, G. E.; SOLER-ILLIA, G. J. A. A.},title={Chain-like uranyl-coordination polymer as a bright green light emitter for sensing and sunlight driven photocatalysis},journal={Journal of Materials Chemistry C},note={v. 8, n. 32, p. 11102-11109 + supplementary files},year={2020}}

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