TCI D4768 N,N'-Di(1-naphthyl)benzidine (purified by sublimation) is an aromatic diamine built on a biphenyl (benzidine) core in which both nitrogen atoms carry 1-naphthyl substituents. In the materials laboratory, it occupies an important position as a high-purity building block for organic electronics research, particularly as a precursor and starting material in the development of hole transport materials belonging to the triphenylamine and naphthylamine families. The sublimation purification step signals that this grade is prepared for work that is highly sensitive to impurities, such as thin-film evaporation inside a vacuum chamber. It is supplied under CAS number 152670-41-2.
The reasons researchers select this grade lie in its purity and its electronic character. Sublimation purification effectively removes residual solvents, inorganic salts, and non-volatile impurities that can act as charge traps and thereby reduce device efficiency and operating lifetime. Structurally, the pair of aromatic amines on the biphenyl framework provides a high electron density, so the molecule is readily oxidised to a stable radical cation — the fundamental mechanism underlying hole transport. The bulky naphthyl groups also contribute to the molecular architecture in a way that favours amorphous, well-behaved films rather than uncontrolled crystallisation.
In Indonesian laboratories, this compound is typically found in university and institutional materials science groups working on organic electronics: OLED and organic photovoltaic research, thin-film deposition studies, and synthetic work aimed at new charge-transport molecules. Because it is a sublimation-grade material, it is generally reserved for experiments where trace contamination would compromise the result, and it is handled alongside vacuum evaporation systems, glovebox workflows, and analytical characterisation of the deposited layers.
- Organic light-emitting diode (OLED) research — the sublimation-purified grade suits vacuum thermal evaporation of hole transport layers, where non-volatile residues would otherwise contaminate the chamber and the deposited film.
- Hole transport material development — the electron-rich diarylamine centres oxidise to a stable radical cation, making this compound a reliable reference and starting point for designing new charge-transport molecules.
- Synthetic precursor chemistry — the benzidine core with two substituted nitrogen atoms offers defined reactive positions for building larger triphenylamine and naphthylamine derivatives in multi-step synthesis.
- Thin-film deposition and morphology studies — the bulky naphthyl substituents help suppress uncontrolled crystallisation, so researchers can investigate amorphous film formation, stability, and interfacial behaviour reproducibly.
- Organic photovoltaic and charge-transport measurement work — high purity minimises charge-trapping impurities, allowing mobility, conductivity, and device-lifetime measurements to reflect intrinsic material behaviour rather than contamination.
| Brand | TCI (Tokyo Chemical Industry) |
|---|---|
| CAS number | 152670-41-2 |
| Molecular formula | — |
| Purity | — |
| Category | Materials Science > High Purity Compounds > Compounds Purified by Sublimation |
| Pack sizes | available in standard research quantities; please confirm the current pack size options when ordering |
| Physical form | — |
| Storage | keep in the tightly closed original container, protected from light and moisture |
- Catalogue number: D4768
- Grade: purified by sublimation, intended for impurity-sensitive applications such as vacuum thin-film evaporation
Store the container tightly closed in a cool, dry, well-ventilated place, protected from light and away from oxidising agents and sources of ignition. The original amber or opaque supplier container is the most suitable vessel; if transfer is necessary, use clean, dry glass with a secure closure, and consider inert-gas headspace or desiccated storage for material intended for thin-film work, since adsorbed moisture and airborne dust degrade film quality. Handle as a fine aromatic amine powder: weigh in a fume hood or ventilated enclosure, avoid generating dust, and wear nitrile gloves, safety glasses, and a laboratory coat. Avoid inhalation and skin contact, wash hands after handling, and consult the manufacturer's safety data sheet before use and for disposal guidance.
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