19227-70-4

Basic information

• Product Name: Guanidine Hydroiodide
• Synonyms: Guanidine Hydroiodide;carbamimidoylazanium:iodide
• CAS NO: 19227-70-4
• Molecular Formula: CH₆N₃*I
• Molecular Weight: 186.98291
• EINECS: -0
• Mol File: 19227-70-4.mol

Chemical Properties

• Melting Point: 194.0 to 198.0 °C
• Appearance: /
• Water Solubility: Soluble in water
• CAS DataBase Reference: Guanidine Hydroiodide(CAS DataBase Reference)
• NIST Chemistry Reference: Guanidine Hydroiodide(19227-70-4)
• EPA Substance Registry System: Guanidine Hydroiodide(19227-70-4)

Safety Data

• Statements: 22-36/37/38
• Safety Statements: 26
• Hazardous Substances Data: 19227-70-4(Hazardous Substances Data)

Usage

Uses

Used in Solar Cell Applications:
Guanidine Hydroiodide is used as an additive in hybrid organic-inorganic perovskite solar cells for enhancing carrier lifetimes and open-circuit voltages. This is due to the hydrogen bonding capability of the GI molecule, which allows for effective passivation of under-coordinated iodine species located at grain boundaries.
Used in Photovoltaic Applications:
Guanidine Hydroiodide is used as a precursor for the fabrication of perovskites for photovoltaic applications. Organohalide-based perovskites have emerged as an important class of material for solar cell applications, and the use of GI-based additives has been shown to optimize the band gap, carrier diffusion length, and power conversion efficiency of perovskite-based solar cells.

Upstream product

• 506-78-5 cyanogen iodide 
• 7664-41-7 ammonia 
• 593-85-1 diguanidine carbonate 
• 50-01-1 guanidine hydrochloride 
• 30738-99-9 thiourea 

Relevant articles and documents

Orthoamides and Iminium salts, CIII. Synthesis of N,N′,N′′-persubstituted guanidinium salt-based ionic liquids by anion metathesis

N,N′,N′′-peralkylated guanidinium chlorides and N,N′,N′′-peralkylated guanidines were prepared from N,N′-peralkylated chloroformamidinium chlorides. The alkylation of the guanidines affords N,N′,N′′-persubstituted guanidinium chlorides bromides, iodides,

Crystal structure of the high-temperature polymorph of C(NH2)3PbI3 and its thermal decomposition

The synthesis of guanidinium lead iodide, C(NH2)3PbI3 (GUAPbI3), was conducted by slow evaporation of the mixture obtained by dissolving PbI2 and C(NH2)3I in acetonitrile. When the evaporation is done at 40 oC, a yellow needle-like crystals are being formed. The sample was characterized by elemental analysis, density measurements, scanning electron microscopy, thermal analyses, high-temperature X-ray powder diffraction and infrared spectroscopy measurements. The elemental analysis of the obtained crystals confirmed the proposed stoichiometry. The performed thermal analyses showed an endothermic peak associated with structural transition around 160 oC. On the other hand, the endothermic temperature effects above 300 oC are accompanied with mass loss and were interpreted as compound degradation. The crystal structure of high temperature polymorph between 160 oC and 300 oC was determined using high-temperature powder diffraction data measurements at 280 oC using simulated annealing technique in order to obtain initial structural model. The structure was refined using the Rietveld method. At temperatures higher than 160 oC, C(NH2)3PbI3 crystallizes in hexagonal space group P63mc with unit cell parameter a increasing from 9.269 ? to 9.337 ? between 160 oC and 300 oC and c parameter increasing from 15.211 ? to 15.287 ? in the same temperature range. The structure consists of PbI6 octahedra couples sharing a common face, linked with corners. Guanidinium cations are situated in the channels between Pb2I9 couples in a manner that the plane of the molecule is perpendicular to the c-axis.

Efficient Catalysts of Acyclic Guanidinium Iodide for the Synthesis of Cyclic Carbonates from Carbon Dioxide and Epoxides under Mild Conditions

We have studied the synthesis of five-membered cyclic carbonates through the cycloaddition of CO 2 to epoxides by using acyclic guanidinium salts. We have found that the cycloaddition reactions proceed smoothly at ordinary temperatures and pressures and result in good yields when acyclic guanidinium iodides are employed as catalysts. Both cation moiety and anion moiety of the guanidinium salts play important roles in their catalytic activity. It is essential to have active hydrogens on the cation moiety as well as an iodide ion as the anion moiety so as to achieve good catalytic activity. Guanidinium iodides with three or more active hydrogens give cyclic carbonates in high yields in polar solvents such as 1-methylpyrrolidin-2-one, whereas the guanidinium iodides with one or two active hydrogens show good catalytic activity in less polar solvents such as 2-methyltetrahydrofuran.

Calcium antagonists

The present invention is directed to a new class of cyclic guanidines of the formula: STR1 in which Q is represented by a substituent selected from the group consisting of (CH2)n in which n is an integer from 2-10, STR2 A is a substi

IMIDAZOLYL ALKYL GUANIDINE DERIVATIVES, PROCESSES FOR THEIR PREPARATION AND PHARMACEUTICAL PREPARATIONS CONTAINING THESE COMPOUNDS

New imidazolylalkyl-guanidine derivatives are described, which by virtue of their agonistic action on histamine-H 2 receptors and in part also due to their additional H 1-antagonistic receptor activity can be used in the treatment of cardiac diseases, certain forms of hypertension and diseases of arterial occlusion.These imidazolylalkyl-guanidine derivatives correspond to the general formula I: STR1

Substituted guanidine compounds as antifibrillatory agents

Acid addition salts of N-p-methylbenzyl-N',N"-dimethylguanidine and of N-p-methoxybenzyl-N',N"-dimethylguanidine. The compounds have antiarrhythmic properties, and are useful specifically as antifibrillatory agents.