Butyl PBD

Butyl PBD or b-PBD (short for butyl-phenyl-bipheny-oxydiazole[1]) is a fluorescent organic compound used in the Liquid Scintillator Neutrino Detector (LSND) at Los Alamos National Laboratory, USA.[1]

Butyl PBD
Names
Preferred IUPAC name
2-([1,1′-Biphenyl]-4-yl)-5-(4-tert-butylphenyl)-1,3,4-oxadiazole
Other names
2-(4-tert-Butylphenyl)-5-(4-biphenylyl)-1,3,4-oxadiazole
2-(4-Biphenylyl)-5-(4-tert-butylphenyl)-1,3,4-oxadiazole
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.035.563
EC Number
  • 239-135-7
UNII
  • InChI=1S/C24H22N2O/c1-24(2,3)21-15-13-20(14-16-21)23-26-25-22(27-23)19-11-9-18(10-12-19)17-7-5-4-6-8-17/h4-16H,1-3H3 checkY
    Key: XZCJVWCMJYNSQO-UHFFFAOYSA-N checkY
  • InChI=1/C24H22N2O/c1-24(2,3)21-15-13-20(14-16-21)23-26-25-22(27-23)19-11-9-18(10-12-19)17-7-5-4-6-8-17/h4-16H,1-3H3
    Key: XZCJVWCMJYNSQO-UHFFFAOYAT
  • CC(C)(C)c1ccc(cc1)c2nnc(o2)c3ccc(cc3)c4ccccc4
Properties
C24H22N2O
Molar mass 354.44 g mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
☒N verify (what is checkY☒N ?)
Infobox references

The fluorescent emission of b-PBD is at λem = 364 nm for excitation at λex = 305 nm (in ethanol solution).[2] As a scintillant in the LSND, it was used at a concentration of 31 mg/L (87 μmol/L) dissolved in mineral oil.[1]

References
  1. Athanassopoulos, C.; Auerbach, L. B.; Bauer, D.; Bolton, R. D.; Burman, R. L.; Cohen, I.; Caldwell, D. O.; Dieterle, B. D.; Donahue, J. B.; Eisner, A. M.; Fazely, A.; Federspiel, F. J.; M. Gray, G. T. Garvey; Gunasingha, R. M.; Highland, V.; Imlay, R.; Johnston, K.; Kim, H. J.; Louis, W. C.; Lu, A.; Margulies, J.; Mills, G. B.; McIlhany, K.; Metcalf, W.; Reeder, R. A.; Sandberg, V.; Schillaci, M.; Smith, D.; Stancu, I.; Strossman, W.; Tayloe, R.; Van Dalen, G. J.; Vernon, W.; Wang, Y-X.; White, D. H.; Whitehouse, D.; Works, D.; Xiao, Y.; Yellin, S. (1997), "The Liquid Scintillator Neutrino Detector and LAMPF Neutrino Source", Nucl. Instrum. Methods A, 388: 149–72, arXiv:nucl-ex/9605002v1, Bibcode:1997NIMPA.388..149A, doi:10.1016/S0168-9002(96)01155-2.
  2. B8378 2-(4-tert-Butylphenyl)-5-(4-biphenylyl)-1,3,4-oxadiazole ≥99%, Sigma-Aldrich, retrieved 2010-05-22.
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