POPOP

Structural formula
General
Surname	POPOP
other names	1,4-bis (5-phenyloxazol-2-yl) benzene; 1,4-bis [2- (5-phenyloxazolyl)] benzene;
Molecular formula	C 24 H 16 N 2 O 2
Brief description	yellow solid
External identifiers / databases
EC number	217-304-6
ECHA InfoCard	100.015.731
PubChem	15732
ChemSpider	14960
Wikidata	Q414326
properties
Molar mass	364.40 g mol −1
Physical state	firmly
Melting point	242-246 ° C
solubility	almost insoluble in water; 0.12% in toluene ; 0.02% in hexane ;
safety instructions
GHS labeling of hazardous substances Caution
H and P phrases	H: 302-319
	P: 305 + 351 + 338
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

POPOP or 1,4-bis (5-phenyloxazol-2-yl) benzene is a chemical compound.

POPOP (abbreviation of P = phenyl (en) and O = oxazole ) is a so-called wavelength shifter (a secondary scintillator ). It is used as a component of liquid and / or plastic scintillators to shift the emission spectrum emitted by the primary scintillator, which is in the UV range , into the visible wavelength range. Its emission maximum is 410 nm. POPOP forms yellow, felty crystals and is sparingly soluble in organic solvents.

Just like POPOP, its derivative dimethyl-POPOP (1,4-bis (4-methyl-5-phenyloxazol-2-yl) benzene) is used; another wavelength shifter is bis-MSB .

Individual evidence

↑ ^a ^b ^c ^d Data sheet 1,4-Bis (5-phenyl-2-oxazolyl) benzene from Sigma-Aldrich , accessed on February 7, 2019 ( PDF ).
↑ ^a ^b ^c ^d ^e Entry on 2,2 ′ - (p-phenylene) bis (5-phenyloxazole). In: Römpp Online . Georg Thieme Verlag, accessed on February 7, 2019.
↑ External identifiers of or database links for 1,4-bis (4-methyl-5-phenyloxazol-2-yl) benzene : CAS number: 3073-87-8, EC number: 221-349-7, ECHA InfoCard: 100.019.409 , PubChem : 76491 , ChemSpider : 68961 , Wikidata : Q81990290 .

[Sigma-1] Data sheet 1,4-Bis (5-phenyl-2-oxazolyl) benzene from Sigma-Aldrich , accessed on February 7, 2019 ( PDF ).

[Römpp-2] Entry on 2,2 ′ - (p-phenylene) bis (5-phenyloxazole). In: Römpp Online . Georg Thieme Verlag, accessed on February 7, 2019.

[3] External identifiers of or database links for 1,4-bis (4-methyl-5-phenyloxazol-2-yl) benzene : CAS number: 3073-87-8, EC number: 221-349-7, ECHA InfoCard: 100.019.409 , PubChem : 76491 , ChemSpider : 68961 , Wikidata : Q81990290 .