Sta 449c unit

The reagents and solvents employed were commercially available and used as received without further purification. Single-crystal X-ray diffraction data were collected with a Rigaku Saturn 70 CCD, a Bruker APEX-II diffractometer or a Bruker D8 VENTURE TXS PHOTON 100 equipped with graphite monochromated Mo Kα radiation (λ = 0.71073 Å) using either the ω or the φ–ω scan mode. Elemental analyses of carbon, hydrogen and nitro­gen were performed with a Perkin Elmer 240C elemental analyzer. The infrared spectra were measured by a Magna-IR 750 spectrophotometer in the 4000–400 cm⁻¹ region (KBr pellet). Thermogravimetric analyses (TGA) were carried out on a NETZSCH STA 449C unit at a heating rate of 10°C min⁻¹ under a nitro­gen atmosphere. Photoluminescence analyses were performed on a Perkin Elemer LS55 fluorescence spectrometer.

Silver iodide (AgI, Adamas, 98%), lead iodide (PbI₂, Aladdin, 98%), cobalt chloride hexahydrate (CoCl₂·6H₂O, Sinopharm, 99.9%), nickel chloride hexahydrate (NiCl₂·6H₂O, Sinopharm, 99.9%), potassium iodide (KI, Greagent, 99%), 1,10-phenanthroline (phen, Aladdin, 99%), 5,5-dimethyl-2,2-dipyridine (5,5-dmpy, Adamas, 98%), acetonitrile (CH₃CN, Kermel, 99.5%) and hydriodic acid (HI, Adamas, 55–57 wt %). All the starting chemicals in this study were commercially available and need not be further disposal when used.
Purity identifications of samples were conducted by a SmartLab diffractometer. Thermogravimeric curves of title compounds were obtained using a NETZSCH STA449C unit (N₂ atmosphere, 10 K/min). A Thermo Fisher GX4 scanning electron microscope and a 3600 SHIMADZU spectrometer were utilized to acquire the energy-dispersive X-ray (EDX) spectra and the solid optical diffuse reflectance data, respectively.