4-FLUORO-PHENETHYLAMMONIUM BROMIDE C₈H₁₁BRFN 99% 4FPEABR CAS 1807536-06-6RESEARCH GRADE MATERIAL
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TAILORED SOLUTIONS FOR RESEARCH
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Manufacturer: Atomfair LLC
Brand: ATOMFAIR®
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This material is hygroscopic and light-sensitive, requiring immediate transfer to a desiccated, light-protected environment after opening. Exposure to atmospheric moisture causes deliquescence and hydrolysis, irreversibly degrading precursor stoichiometry.
- Moisture Sensitivity: The compound must be stored in a sealed container under inert atmosphere to prevent moisture ingress and subsequent degradation.
- Light Sensitivity: Protect the material from light exposure at all times using opaque or amber packaging to avoid photodegradation.
- Glovebox Requirement: All powder weighing and solution preparation must be performed inside a nitrogen-filled inert glovebox with H₂O < 1 ppm and O₂ < 1 ppm.
- Incompatible Storage: Do not store together with strong oxidizing agents or acidic reagents to avoid hazardous reactions.
- Container Handling: Tighten the container cap immediately after each use to prevent ambient moisture from entering the vessel.
Follow these steps to maintain material integrity and prevent degradation during routine laboratory use. All operations must be conducted under inert atmosphere with appropriate personal protective equipment.
Required Equipment: Nitrogen-filled glovebox (H₂O < 1 ppm, O₂ < 1 ppm), Protective gloves (nitrile or equivalent), Light-protective storage container or amber vial
- Inspect Packaging
Inspect the sealed packaging for any signs of damage or moisture ingress before opening. - Transfer to Glovebox
Transfer the unopened container into a nitrogen-filled glovebox with controlled atmosphere (H₂O < 1 ppm, O₂ < 1 ppm). - Weigh Material
Weigh the required amount of powder inside the glovebox using a clean spatula and analytical balance. - Reseal Container
Tighten the container cap immediately after removing the desired quantity to prevent moisture ingress. - Store Properly
Store the sealed container in a light-protected, desiccated location within the glovebox for long-term stability.
Why is 4FPEABr specifically recommended as a bromide analog for passivating bromide-based perovskite films instead of using the iodide variant?
4FPEABr is the bromide salt variant in the fluoro-phenethylammonium series, providing halide-matched passivation for bromide-based perovskite compositions. Using the iodide analog would introduce halide exchange effects that can alter the bandgap during surface treatment, whereas 4FPEABr eliminates this risk, ensuring consistent optoelectronic properties in bromide-based devices.
What are the critical storage and handling requirements to prevent degradation of 4-fluoro-phenethylammonium bromide?
4FPEABr is hygroscopic and light-sensitive; exposure to atmospheric moisture causes deliquescence and hydrolysis, irreversibly degrading precursor stoichiometry. Immediate transfer to a light-protected, desiccated environment—preferably a nitrogen-filled glovebox (H₂O < 1 ppm, O₂ < 1 ppm)—is required for long-term storage. The container cap must be tightened immediately after each use, and powder weighing and solution preparation should be performed under inert atmosphere.
How does the para-fluorine substituent in 4FPEABr improve moisture resistance compared to unsubstituted PEABr?
The electron-withdrawing para-fluorine substituent establishes a molecular dipole that modulates crystal growth orientation and provides enhanced hydrophobicity relative to unsubstituted PEABr. This fluorine-substituted aromatic ring delivers superior moisture protection by blocking water ingress, while the ammonium head group simultaneously passivates grain boundary and surface defect states, reducing non-radiative recombination.
4-Fluoro-Phenethylammonium Bromide (4FPEABr) is a para-fluorine modified organic bromide salt for 2D perovskite defect passivation, offering dipole-modulated crystal orientation and hydrophobic moisture barrier, but requires strict inert-atmosphere handling due to hygroscopicity and light sensitivity.
Positive
- Fluorine-modulated dipole for crystal orientation: The electron-withdrawing para-fluorine substituent establishes a molecular dipole that influences crystal growth orientation during perovskite film formation, promoting favorable grain alignment for enhanced charge transport in bromide-based devices.
- Strong hydrophobic barrier with defect passivation: The fluorine-substituted aromatic ring provides enhanced hydrophobicity compared to unsubstituted PEABr, delivering superior moisture protection while the ammonium head group simultaneously passivates grain boundary and surface defect states.
Trade-offs
- Hygroscopic and light-sensitive storage required: The compound is hygroscopic and light-sensitive, requiring immediate transfer to a desiccated, light-protected environment—preferably a nitrogen-filled glovebox for long-term storage to prevent degradation.
- Moisture exposure causes irreversible degradation: Exposure to atmospheric moisture will cause deliquescence and hydrolysis, irreversibly degrading precursor stoichiometry; powder weighing and solution preparation must be performed within an inert glovebox (H2O < 1 ppm, O2 < 1 ppm).
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To request raw batch performance data, submit formal vendor registration paperwork, or execute a fast-turnaround R&D manufacturing loop, contact us at inquiry@atomfair.com.
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