Abstract

The author has investigated the state of orientation of methylene blue molecules absorbed on rubbed glasses. Reflection spectra made with polarized visible radiation demonstrate conclusively that the long axis of the molecules is perpendicular to the direction in which the glass was originally rubbed. Absorption spectra with polarized infra-red radiation show, in addition, that the molecules are adsorbed on the glass with the plane of their benzene ring parallel to the glass.

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  1. H. Zocher, Naturwiss. 13, 1015 (1925).
  2. Lucien Demon, Ann. de physique 1, 101 (1946); S. E. Sheppard, R. H. Lambert, and R. D. Walker, J. Chem. Phys. 7, 265 (1939); H. Zocher and K. Coper, Zeits. f. physik. Chemie 132, 295 (1928).
  3. W. H. Taylor, Zeits. f. Krist. 01, 450 (1935).
  4. Eugene Rabinovitch and Leo F. Epstein, J. Am. Chem. Soc. 63, 69 (1941).
  5. L. Michaelis and S. Granick, J. Am. Chem. Soc. 67, 1212 (1945).
  6. C. Schaefer, Zeits. f. Physik 75, 687 (1932).
  7. G. N. Lewis and M. Calvin, Chem. Rev. 25, 273 (1939).
  8. A. H. Pfund, J. Opt. Soc. Am. 37, 558 (1947).
  9. Hydrogen out-of-plane vibrations in benzene are less than 1000 cm-1. In particular, there is a degenerate vibration (10a, b) at 951 cm-1 in benzene and this may have degeneracy splitting. See F. A. Miller and B. L. Crawford, J. Chem. Phys. 14, 282 (1946).
  10. See for example, George Herzberg, Infrared and Raman Spectra (D. Van Nostrand Company, Inc., New York, 1945), pp. 338 and 360โ€“361.
  11. This is a vibration designated by 8A, B by Kenneth S. Pitzer and Donald W. Scott, J. Am. Chem. Soc. 65, 803 (esp. p. 815) (1943).

Calvin, M.

G. N. Lewis and M. Calvin, Chem. Rev. 25, 273 (1939).

Crawford, B. L.

Hydrogen out-of-plane vibrations in benzene are less than 1000 cm-1. In particular, there is a degenerate vibration (10a, b) at 951 cm-1 in benzene and this may have degeneracy splitting. See F. A. Miller and B. L. Crawford, J. Chem. Phys. 14, 282 (1946).

Demon, Lucien

Lucien Demon, Ann. de physique 1, 101 (1946); S. E. Sheppard, R. H. Lambert, and R. D. Walker, J. Chem. Phys. 7, 265 (1939); H. Zocher and K. Coper, Zeits. f. physik. Chemie 132, 295 (1928).

Epstein, Leo F.

Eugene Rabinovitch and Leo F. Epstein, J. Am. Chem. Soc. 63, 69 (1941).

Granick, S.

L. Michaelis and S. Granick, J. Am. Chem. Soc. 67, 1212 (1945).

Herzberg, George

See for example, George Herzberg, Infrared and Raman Spectra (D. Van Nostrand Company, Inc., New York, 1945), pp. 338 and 360โ€“361.

Lewis, G. N.

G. N. Lewis and M. Calvin, Chem. Rev. 25, 273 (1939).

Michaelis, L.

L. Michaelis and S. Granick, J. Am. Chem. Soc. 67, 1212 (1945).

Miller, F. A.

Hydrogen out-of-plane vibrations in benzene are less than 1000 cm-1. In particular, there is a degenerate vibration (10a, b) at 951 cm-1 in benzene and this may have degeneracy splitting. See F. A. Miller and B. L. Crawford, J. Chem. Phys. 14, 282 (1946).

Pfund, A. H.

A. H. Pfund, J. Opt. Soc. Am. 37, 558 (1947).

Pitzer, Kenneth S.

This is a vibration designated by 8A, B by Kenneth S. Pitzer and Donald W. Scott, J. Am. Chem. Soc. 65, 803 (esp. p. 815) (1943).

Rabinovitch, Eugene

Eugene Rabinovitch and Leo F. Epstein, J. Am. Chem. Soc. 63, 69 (1941).

Schaefer, C.

C. Schaefer, Zeits. f. Physik 75, 687 (1932).

Scott, Donald W.

This is a vibration designated by 8A, B by Kenneth S. Pitzer and Donald W. Scott, J. Am. Chem. Soc. 65, 803 (esp. p. 815) (1943).

Taylor, W. H.

W. H. Taylor, Zeits. f. Krist. 01, 450 (1935).

Zocher, H.

H. Zocher, Naturwiss. 13, 1015 (1925).

Other (11)

H. Zocher, Naturwiss. 13, 1015 (1925).

Lucien Demon, Ann. de physique 1, 101 (1946); S. E. Sheppard, R. H. Lambert, and R. D. Walker, J. Chem. Phys. 7, 265 (1939); H. Zocher and K. Coper, Zeits. f. physik. Chemie 132, 295 (1928).

W. H. Taylor, Zeits. f. Krist. 01, 450 (1935).

Eugene Rabinovitch and Leo F. Epstein, J. Am. Chem. Soc. 63, 69 (1941).

L. Michaelis and S. Granick, J. Am. Chem. Soc. 67, 1212 (1945).

C. Schaefer, Zeits. f. Physik 75, 687 (1932).

G. N. Lewis and M. Calvin, Chem. Rev. 25, 273 (1939).

A. H. Pfund, J. Opt. Soc. Am. 37, 558 (1947).

Hydrogen out-of-plane vibrations in benzene are less than 1000 cm-1. In particular, there is a degenerate vibration (10a, b) at 951 cm-1 in benzene and this may have degeneracy splitting. See F. A. Miller and B. L. Crawford, J. Chem. Phys. 14, 282 (1946).

See for example, George Herzberg, Infrared and Raman Spectra (D. Van Nostrand Company, Inc., New York, 1945), pp. 338 and 360โ€“361.

This is a vibration designated by 8A, B by Kenneth S. Pitzer and Donald W. Scott, J. Am. Chem. Soc. 65, 803 (esp. p. 815) (1943).

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