4-Fluoro-1H-indazole
CAS Number 341-23-1
Chemistry Building Blocks, Fluorinated Building Blocks, Heterocyclic Building Blocks, Materials, Monomers
A versatile fluorinated indazole building block
Used for the synthesis of semiconducting molecules and polymers in the application of OLEDs and OPVs
Specifications | MSDS | Literature and Reviews
4-Fluoro-1H-indazole (also known as 4-Fluoroindazole), CAS number 341-23-1, a fluorinated indazole heterocyclic aromatic compound and a powerful chromophore unit, consists of a fluoride substituent at 4-position with the pyrazole fused to a benzene ring. 4-Fluoro-1H-indazole can readily be further functionalized via nucleophilic aromatic substitution reactions.
Pyrazoles and indazoles have been extensively used pharmaceutical industry with a variety of biological activities. Indazole is a highly conjugated molecule which expands its applications to dye-sensitized solar cells (DSSCs). Owing to the pyrazole moiety, 4-fluoro-1H-indazole can coordinate to metal centre (such as Ir, Ln and Eu) to form either heteroleptic or homoleptic triplet photosensitizers that have an efficient ligand to metal energy transfer process. The fluorine group in the molecule is electron deficient and can be used to tune the energy gap of the molecule/complex. This fluorinated indazole enable the intermolecular interaction including π−π stacking and H−F hydrogen/halogen bonding.
Multiple functional groups
For facile synthesis
Fluorinated indole building block
For semiconductors, dyes, and solar cells
Worldwide shipping
Quick and reliable shipping
High purity
>98% High purity
General Information
| CAS Number | 341-23-1 |
| Chemical Formula | C7H5FN2 |
| Full Name | 4-Fluoro-1H-indazole |
| Molecular Weight | 136.13 g/mol |
| Synonyms | 4-Fluoroindazole |
| Classification / Family | Indazole derivatives, Fluorinated building blocks, Heterocyclic building blocks, Dyes, Semiconductor synthesis intermediates, OPVs |
Chemical Structure
Product Details
| Purity | >98% (1H NMR) |
| Melting Point | Tm = 130 °C - 134 °C |
| Appearance | Yellow-green powder/crystals |
MSDS Documentation
4-Fluoro-1H-indazole MSDS Sheet
Literature and Reviews
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Synthesis, electrochemical, photophysical, and photovoltaic properties of new fluorescent compounds: 3H-benzofuro [2,3-b]pyrazolo[4,3-f]quinoline, Z. Ghamati et al., Int. J. Energy Res., 45,7797–7805(2021); DOI: 10.1002/er.6363.
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New derivatives of indazole as electronically active materials, M. Cekaviciute et al., Dyes Pigm., 92, 654-658(2011); DOI:10.1016/j.dyepig.2011.05.021.
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Effective passivation of a high-voltage positive electrode by 5-hydroxy-1H-indazole additives, Y.-S. Kang et al., J. Mater. Chem. A, 2, 14628-14633(2014); DOI: 10.1039/c4ta01891e.