C2h2o4 2h2o

The UPR PP-250 provided by Poliformas Plasticas Mexico was used as a matrix. This liquid resin is composed of a copolymer of maleic acid (30% mol) and isophthalic acid (30% mol) with propanediol (40% mol), and styrene (20 wt % styrene) with a small fraction of polymerization inhibitor. Since the PP-250 resin is hardened via a radical process, cobalt octoate used as an accelerator and the methylethylketone peroxide initiator solution were added to the mixture.
Analytical grade zinc acetate (Zn(CH₃COO)₂·2H₂O 99.8%) and oxalic acid (C₂H₂O₄·2H₂O, 99.8%) from Sigma-Aldrich were used without further purification.

Lead (II) bromide (PbBr₂, 99.99%), Lead (II) iodide (PbI₂, 99.99%), and Iron (III) chloride anhydrous (FeCl₃, 98%) were purchased from Alfa Aesar. Cobalt (II) acetylacetonate (Co(C₅H₇O₂)₂, 99%), Octadecene (ODE, 90%), and titanium chloride (TiCl₄, 99.9%) were obtained from AcrosOrganics. Oleylamine (OAm, 70%), Oleic acid (OAc, 90%), Methylammonium bromide (MABr), Formamidinium Iodide (FAI), Ni‐(NO₃)₂·6H₂O (98%), C₂H₂O₄·2H₂O (99.5%), NaOH (96%), Dimethylformanmide (DMF, extra dry, 99%), Dimethyl sulfoxide (DMSO, extra dry, 99%), 1, 2‐diChlorobenzene (DCB, extra dry, > 98%), Chlorobenzene (CB, extra dry, 99.8%), Isopropanol (extra dry, 99.8%), and other chemicals were purchased from Sigma‐Aldrich.