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D210404

Sigma-Aldrich

2,5-Diphenyloxazole

99%, suitable for scintillation

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Synonym(s):
DPO, PPO
Empirical Formula (Hill Notation):
C15H11NO
CAS Number:
92-71-7
Molecular Weight:
221.25
Beilstein:
157021
EC Number:
202-181-3
MDL number:
MFCD00005306
PubChem Substance ID:
24893626
NACRES:
NA.23

Quality Level

200

Assay

99%

form

powder

bp

360 °C (lit.)

mp

72-74 °C (lit.)

λmax

303 nm

suitability

suitable for scintillation

SMILES string

c1ccc(cc1)-c2cnc(o2)-c3ccccc3

InChI

1S/C15H11NO/c1-3-7-12(8-4-1)14-11-16-15(17-14)13-9-5-2-6-10-13/h1-11H

InChI key

CNRNYORZJGVOSY-UHFFFAOYSA-N

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General description

2,5-Diphenyloxazole (PPO) is an oxazole that can be used as a scintillator and a laser dye. It has fluorescence at a wavelength of 375 nm. It can be used as a wavelength shifter in liquid samples due to their high quantum yield and large strokes shift.

Application

PPO can be used as a dopant that improves the photo-electric feedback of plastic scintillators which are used as radiation detectors for nuclear materials. It can be coated on peptide substrates to facilitate radioactive labelling which can enable determination of substrate specificity of lysine methyltransferase enzymes. It may also be used in the fabrication of organic luminescent materials which can be used in light emitting diodes (LEDs).

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Product No.
Description
Pricing

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

386.6 - 393.8 °F - closed cup

Flash Point(C)

197 - 201 °C - closed cup

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Phase transition pattern of 2, 5-diphenyloxazole/γ-cyclodextrin (PPO/-CD) self-assembly.
Agnew KA
Journal of Photochemistry and Photobiology A: Chemistry, 91(3), 205-210 (1995)
Methacrylate based cross-linkers for improved thermomechanical properties and retention of radiation detection response in plastic scintillators.
Mahl A, et al.
Nucl. Instrum. Methods Phys. Res., Sect. A, 884(10), 113-118 (2018)
An optimized method using peptide arrays for the identification of in vitro substrates of lysine methyltransferase enzymes.
Rowe EM and Biggar KK
MethodsX, 5(10), 118-124 (2018)
Synthesis and optical properties of highly luminescent phenyloxazole silane polymer.
Skorotetcky MS.
Mendeleev Communications, 27(4), 377-379 (2017)
Olivier Braem et al.
Physical chemistry chemical physics : PCCP, 14(10), 3513-3519 (2012-02-07)
We present a femtosecond broad-band fluorescence up-conversion study of the vibrational relaxation dynamics of two UV chromophores, 2,5-diphenyloxazole (PPO) and para-terphenyl (pTP), pumped with a large excess of vibrational energy (>2000 cm(-1)). The band narrowing of the transient fluorescence spectrum
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