Abstract
[C5H14N2][(UO2)2(C2O4)3(H2O)]·3H2O·CO (NMPZ 1#) and [C5H14N2][UO2 (C2O4)3/2(H2O)][NO3]·H2O (NMPZ 2#) were synthesized by volatile method at room temperature using N-methylpiperazine as templates. The structures and optical properties were characterized by combination of single-crystal X-ray diffraction, PXRD, TG-DSC, IR, UV-Vis and fluorescence techniques. The single crystal structure results show that NMPZ 1# is a monoclinic crystal system, P21/n space group while NMPZ 2# is a triclinic crystal system, P-1 space group. Interestingly, NMPZ 1# has the following special properties and applications. According to the results of fluorescence experiment, NMPZ 1# shows fluorescence attenuation with time increasing, which make it have a potential application as a fluorescent sensor material. CO gas could escape from the lattice of NMPZ 1# under UV-light, which demonstrates the potential application of NMPZ 1# as a CO gas reservoir. Overall, this study confirms the close relationship between the properties of uranyl oxalate complexes and amine templates; such structures could provide a reference for relevant research.
Graphical Abstract
Acknowledgement
The authors wish to thank Xueling Qiao for the helpful guidance to analyze crystal structures.
Disclosure statement
The authors promise that there is no conflict of interest.