Synthesis, characterisation and thermal properties of hydrazinium metal oxalate hydrates. crystal and molecular structure of hydrazinium copper oxalate monohydrate

Thermal decomposition of energetic materials 67. Hydrazinium nitroformate (HNF) rates and pathways under combustionlike conditions

LHT-9, a layered hydrazinium titanate with an interlayer spacing of ∼9 A, is a new nanohybrid compound combining the redox functionality of hydrazine, the ion-exchange properties of layered titanate, the large surface area of quasi-two-dimensional crystallites, surface Bronsted acidity, and the occurrence of surface titanyl bonds. LHT-9, ideally formulated as (N2H5)1/2Ti1.87O4, relates to a family of lepidocrocite-type titanates. It possesses a high uptake capacity of ∼50 elements of the periodic table. Irreversibility of reductive adsorption allows LHT-9 to be used for cumulative extraction of reducible moieties (noble metals, chromate, mercury, etc.) from industrial solutions and wastewaters. Unlike sodium titanates that do not tolerate an acidic environment, LHT-9 is capable of uptake of transition metals and lanthanides at pH > 3. Adsorption products loaded with the desired elements retain their layered structures and can be used as precursors for tailored titanium dioxide nanomaterials. In this respe...

Layered Hydrazinium Titanate: Advanced Reductive Adsorbent and Chemical Toolkit for Design of Titanium Dioxide Nanomaterials

A criterion from vibrational spectra for distinguishing the N2H+5 from the N2H2+6 ion: vibrational spectra of hydrazinium (1+) and (2+) fluorometalates and Raman spectra of hydrazinium (1+) and (2+) fluorides in the 900–1700 cm−1 region

Photovoltaic perovskites, most notably methylammonium lead triiodide, (NH3Me)PbI3, have recently attracted considerable attention, and based upon the modified “Goldschmidt” as well as a “revised” tolerance factors, hydrazinium should be able to occupy the same cation site as methylammonium, and form a cubic unit cell. The reaction of N2H5+I− with PbI2 in dimethylformamide results in three types of yellow crystals; hexagonal, needle-like, and rod-like, the structures of which were determined at 100 K. The hexagonal (P63/m: a=10.8906(10) A; b=37.845(5) A) crystals possess isolated face-sharing octahedral [Pb2I9]5−, [PbI6]4−, and I− ions. IR spectroscopy indicates the presence of hydrogen-bonded N2H5+ and the composition was determined by single-crystal X-ray diffraction, density measurements, combustion elemental analysis, and thermogravimetric analysis to be (N2H5)15Pb3I21, which is photoluminescent at 50 K, but not at room temperature. The needle and rod crystals have an orthorhombic (Pnma: a=11.1385(7) A; b=4.4806(3) A; c=17.6241(11) A) and hexagonal (P63/mmc: a=8.7386(9) A; b=8.2006(9) A) unit cells, respectively, possessing the perovskite ABX3 composition of (N2H5)PbI3, but neither exhibits the cubic Perovskite structure type. The structures of α- and β-(N2H5)PbI3 possess parallel ribbons of Pb2I4 and chains of PbI2, respectively. Strong inter-hydrazinium hydrogen bonding due to it possessing both hydrogen bonding donor and acceptor sites (unlike NH3Me+) appear to stabilize the observed extended ribbon motif for (N2H5)15Pb3I21 and α-(N2H5)PbI3. (N2H5)15Pb3I21 has a band-gap-like absorption of 2.34 eV, and both α- and β-(N2H5)PbI3 have a 2.70 eV band-gap-like absorptions.

Structures of a Complex Hydrazinium Lead Iodide, (N2H5)15Pb3I21, Possessing [Pb2I9]5−, [PbI6]4−, and I− Ions and α- and β-(N2H5)PbI3

Infrared and Raman spectra of crystalline hydrazinium monochloride

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Infrared and Raman spectra of crystalline hydrazinium monochloride