Zirconium nitrate (zirconyl)

• CAS: 12372-57-5
• Catalog Number: ACM12372575
• Category: Main Products
• Molecular Weight: 339.24
• Molecular Formula: Zr(NO3)4·3H₂O
• Synonyms: ZIRCONIUM NITRATE (ZIRCONYL);dsicnan zirkonicity
• IUPAC Name: zirconium(4+);tetranitrate
• Canonical SMILES: [N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[Zr+4]
• InChI Key: OERNJTNJEZOPIA-UHFFFAOYSA-N
• Density: 1.4
• EC Number: 237-324-9
• Exact Mass: 337.85600
• H-Bond Acceptor: 12
• H-Bond Donor: 0
• UN Number: 2728

Case Study

Zirconium Nitrate Doped L-Alanine Nonlinear Optical Single Crystals

Suresh, N., et al. Journal of Materials Science: Materials in Electronics, 2020, 31, 16737-16745.

Zirconium nitrate doped L-alanine (ZNLA) nonlinear optical single crystals were grown at room temperature using a low-temperature solution growth slow evaporation technique. Compared with pure L-alanine (LA) single crystals, the obtained ZNLA single crystals showed higher optical transparency. The relative second harmonic efficiency of the ZNLA single crystal is 1.47 times that of KDP, is stable at 248.35°C, and has negative photoconductivity.
ZNLA single crystal preparation procedure
· A mixture of L-alanine (16.8 g) and 0.1 mol% zirconium nitrate (3.4 g) was dissolved in 100 ml of double-distilled water at room temperature. The solution was then stirred continuously for approximately 6 hours using a magnetic stirrer to achieve a homogeneous and fully saturated solution.
· The resulting solution was filtered twice using No. 1 quality Whatman filter paper and covered with a perforated polythene sheet to prevent dust accumulation. It was then placed in an undisturbed location to allow for slow evaporation.
· After approximately 45 days, a high-quality ZNLA crystal measuring 20×5×4mm3 was obtained, which was clear, transparent, and colorless. The quality of ZNLA was enhanced by recrystallizing the crystals three times.

Zirconium Nitrate as a Catalyst for the Synthesis of N-Substituted Pyrroles

Hasaninejad, Alireza, et al. RSC advances, 2012, 2(15), 6174-6177.

The synthesis of N-substituted pyrroles (3-pyrrolyl-indolinones and pyrrolylindeno[1,2-b]quinoxalines) was efficiently achieved by condensation reaction in aqueous medium using catalytic amounts of zirconium nitrate [Zr(NO3)4] as a water-resistant Lewis acid catalyst.
Synthesis procedure of N-substituted pyrroles
· In a 15 mL round-bottomed flask connected to a reflux condenser, Isatin derivatives or 11H-indeno[1,2-b]quinoxalin-11-one derivatives (2 mmol), 4-hydroxyproline (2 mmol), and Zr(NO3)4 (0.2 mmol) were combined with EtOH-H2O in a 3:1 ratio. The mixture was stirred at 80°C for a specific period of time.
· Following this, the reaction mixture was cooled to room temperature, and H2O (30 mL) was added. The resulting crude products were collected by filtration, dried, and purified using column chromatography with n-hexane-EtOAc in a 3:1 ratio as the eluent.
· After isolating the product, the filtrate was subjected to extraction using CHCl3 (2 × 15 mL). The aqueous layer containing Zr(NO3)4 was separated, and the solvent was evaporated to yield approximately 5 mL of an aqueous solution of Zr(NO3)4. The catalyst was then reused with fresh ethanol and substrates in the subsequent run under the same reaction conditions.

Adsorption and reaction of zirconium nitrate on polycrystalline zirconium oxide

Burleson, David J., et al. Journal of the Electrochemical Society 149.10 (2002): F131.

Zirconium nitrate, Zr(NO3)4 (ZN), was studied on polycrystalline zirconium oxide (ZrO2) thin films using temperature programmed reaction mass spectrometry (TPR) and X-ray photoelectron spectroscopy (XPS). TPR measurements show that adsorbed ZN undergoes competitive desorption and reaction around 340 K. This reaction is the first in a series of steps leading to the final formation of ZrO. ZN decomposition results in the formation of a variety of gas-phase products, including NO, NO3, and O2. The gas-phase products evolve from two temperature envelopes centered at ~350 K and ~400 K. The partitioning between desorption and decomposition pathways is a function of the heating rate b during TPD. XPS measurements show that the oxidation state of Zr is constant at +4 during the decomposition process. However, the characteristics of the gas-phase products suggest that the NO3 ligand undergoes redox chemistry during the decomposition process. Based on TPR and XPS measurements, adsorbed peroxides of the formula Zr(NO3)2(O2) and ZrO(O2) are proposed to be intermediates in the decomposition pathway. Both peroxides contain oxygen states that are oxidized relative to the oxygen in ZN.
The surfaces of the experiments were those of polycrystalline ZrO2 films deposited on 1 cm Si (100!) substrates. The films were grown by thermal decomposition of Zr(NO3)4 (ZN) multilayers over a series of TPR sequences, each of which deposited 1 monolayer of the material. The films were measured by XPS and using relative sensitivity factors for the Zr (3d!) and O (1s) transitions in the dense ZN multilayers. No carbon or nitrogen was observed by AES. All films were at least 30 Å thick, as evidenced by the complete absence of any silicon Auger transitions. The films were thick enough that the TPR spectra obtained in the successive deposition sequences were indistinguishable, establishing that the silicon substrate was not visible in vacuum. No attempt was made to characterize the films crystallographically.

Zirconium nitrate solution as pillaring agent for montmorillonite clay

KOOLI, FETHI, et al. Clay Science 12.Supplement2 (2006): 301-306.

The application of zirconium nitrate solution as pillaring agent is reported for the first time. Ca-montmorillonite was exchanged with zirconium species under different conditions and Zr (mmol)/clay ratios and then calcined at different temperatures to obtain stable zirconium pillared clays. The materials were studied by X-ray diffraction, nitrogen adsorption and pyridine desorption. The catalytic performance towards n-heptane isomerization was tested in the temperature range of 250-350 °C. The results show that the aging temperature of the starting zirconium solution after the exchange reaction affects the properties of the zirconium pillared clay. The samples prepared at room temperature exhibited lower surface area and smaller interlayer distance compared to the samples prepared at 80 °C. These differences are attributed to the nature of the polymerized zirconium species in the pillaring solution. The obtained pillared clays possessed both Brønsted and Lewis acid sites, but the Lewis acid sites were mainly detected above 200 °C. The Lewis acidity affected the n-heptane conversion, mainly obtaining cracked products with a yield of about 10% at 300 °C for some isomers.
Zirconium nitrate solution was used as the source of pillaring agent. During preparation, the solution/clay ratio was kept constant at 50 mL/g, which corresponds to a Zr/clay ratio of 6 mmol/g. A 120 mmol/L solution of zirconium nitrate dihydrate was aged at 80 oC for 1 h, which corresponds to a Zr/clay ratio of 6 mmol/g. 5 grams of clay were added to the zirconium solution and the resulting mixture was kept at 80 °C for 1 h with constant stirring to allow the intercalation reaction (cation exchange). The resulting slurry was cooled at room temperature, filtered and repeatedly washed with deionized water. The sample will be identified as Zr-MT-80-6. In some cases, different concentrations of zirconium were used, keeping the amount of clay constant. The product is labeled as Zr-MT-80-X, where the value of X is the ratio of Zr mmol/g clay used in the preparation.