4-Pentylphenyl 4-propylbenzoate (PPPB), CAS 50649-60-0, is a nematic liquid crystal built around a phenylbenzoate core. It belongs to the phenyl ester family of liquid crystals and is used in optical electronics work such as liquid-crystal displays (LCDs). The material is supplied as a colorless liquid with a purity of >97% by 1H NMR.
In its nematic phase the compound shows two distinct relaxation times, τ1 and τ2, consistent with the Cole–Davidson model. These are attributed to molecular motions with different degrees of freedom along different directions in the liquid crystalline state, reflecting two different molecular alignments.
Published studies have used this material in time domain reflectometry investigations of nematic liquid crystals and in polymer-dispersed liquid crystal (PDLC) research, including work on electro-optical behaviour and colored smart windows. It is available in 10 g, 25 g, 50 g and 100 g packs.
- Formulation and study of liquid-crystal displays (LCDs) and other optical electronic devices.
- Dielectric relaxation studies of nematic phases, including time domain reflectometry measurements.
- Preparation of polymer-dispersed liquid crystal (PDLC) films for electro-optical characterisation.
- Research into PDLC-based colored smart windows.
| Brand | Ossila |
|---|---|
| CAS number | 50649-60-0 |
| Molecular formula | C21H26O2 |
| Purity | >97% (1H NMR) |
| Category | — |
| Pack sizes | 10 g, 25 g, 50 g, 100 g |
| Physical form | Colorless liquid |
| Storage | — |
- Product code: M2365A1
- Molecular Weight: 310.43
- Synonyms: 3PEP5, PPPB, Pentylphenyl propylbenzoate, 4-Amylphenyl 4′-propylbenzoate, 4-Propylbenzoic acid 4-pentylphenyl ester
- Classification / Family: Phenyl Ester Liquid Crystals, Nematic Liquid Crystal
- Density: 0.989 g/mL at 25 °C
- Refractive Index: n20/D 1.543
- Melting Point: 15.0 - 18.0 °C
- Solubility: Methanol
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