*3.1. General Methods and Materials*

All chemicals were purchased from Aladdin and used without further purification. Double distilled water was used in all the reactions. Fourier transform infrared spectra were obtained with a Bruker Vertex 80v spectrometer equipped with a DTGS detector with a resolution of 4 cm−<sup>1</sup> in KBr pellets. Elemental analysis of C, H, and N was conducted using a vario MICRO cube from Elementar Company of Germany. Elemental analysis for Cu, Mo and Na was carried out on a PLASMA-SPEC (I) inductively coupled plasma atomic emission spectrometer. Thermogravimetric analysis curves were obtained with a Q500 Thermal Analyzer (New Castle TA Instruments, New Castle, DE, USA) in a flowing N2 under a heating rate of 10 ◦C·min<sup>−</sup>1. Powder X-ray diffraction data were recorded on a Rigaku SmartLab X-ray diffractometer using Cu Kα radiation at a wavelength of 1.54 Å. Single-crystal X-ray diffraction data were collected on a Bruker D8 VENTURE diffractometer with graphite-monochromated Mo K<sup>α</sup> (λ = 0.71073 Å) at 293 K. All crystals were solved by *SHELXT* and refined by full-matrix-least-squares fitting for *F*<sup>2</sup> using the Olex2 software [42,43]. All non-H atoms were refined with anisotropic thermal parameters. A summary of the crystallographic data and structural refinements for compounds **1**–**9** is listed in Table 1. The detailed CCDC 2162383–2162391 contains the supplementary crystallographic data for this paper. These data can be obtained free of charge from www.ccdc.cam.ac.uk/data\_request/cif, accessed on 27 March 2022, or by emailing data\_request@ccdc.cam.ac.uk, or by contacting The Cambridge Crystallographic Data Centre, 12 Union Road, Cambridge CB2 1EZ, UK.


**Table 1.** The summary of crystal data and structure refinements for compounds **1**–**9**.
