期刊
JOURNAL OF MATERIALS CHEMISTRY C
卷 8, 期 32, 页码 11102-11109出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0tc02623a
关键词
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资金
- Consejo Nacional de Investigaciones Cientificas y Tecnicas, CONICET [PICT-2018-03583, PICT-2016-3017, PIP 820CO, PIP 2017-2019 GI 11220170100289CO]
- Universidad Nacional de San Luis [PROICO 02-2016]
- Direccion General de Investigaciones from the Universidad Santiago de Cali
- Brazilian agency CNPq [305190/2017-2]
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)(mu(3)-O)(H2O)]center dot H2O (UNSL-1) is classified as 1D chains showing I(0)O(1)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 ([U1O(7)] and [U2N(2)O(5)]). 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 pi-pi 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 completedvialow-temperature measurements (77 K) and recording the decay emission for calculating the lifetime (tau(obs)) value. Regarding its multifunctional properties, a cation-sensing performance was achieved showing selective quenching toward iron ions in aqueous media. Finally,UNSL-1was tested as an efficient water photocatalyst for dye degradation under simulated sunlight irradiation, exhibiting promising results for organic-pollutant water remediation.
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