Abstract

The problems involved in the development of ultraviolet transmission filters are discussed and criteria of stability, efficiency, and ease of preparation are applied to the materials suggested by previous workers. By the selection of the most suitable previous filters and the introduction of several new filters, a set of band pass filters for the 2400–3800A region of the ultraviolet is developed. These have a half-width of 200A and a maximum transmission of 30 percent, on the average. Quantitative spectrophotometric data are given for all components and filter combinations used. Suggestions are made for the further development of these tools.

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  1. H. L. J. Bäckström, Naturwiss. 21, 251 (1933).
  2. H. Alterthum and M. Reger, Chem. Fabrik 6, 283 (1933); cf. R. Rompe, Acta Phys. Polonica 5, 151 (1936).
  3. E. J. Bowen, J. Chem. Soc. 76 (1935). Cf. Proc. Roy. Soc. A154, 349 (1936). See also, E. J. Bowen, The Chemical Aspects of Light, 2nd Ed. (Clarendon Press, Oxford, 1946). Appendices II and III.
  4. K. S. Gibson, "Spectral filters," International Critical Tables, Vol. 5, p. 271 (1929).
  5. Chr. Winther, Zeits. f. Elektrochemie 43, 691 (1937).
  6. R. W. Wood, Phil. Mag. 5, 257 (1903).
  7. Cf. Fig. 1, T. Dreisch, and W. Trommer, Zeits. f. physik. Chemie B37, 37 (1937).
  8. Glass Color Filters (Corning Glass Works, Corning, New York, 1948), New Edition.
  9. Glass Color Filters (Corning Glass Works, Corning, New York, 1942) (Old Edition, Form C-247-4-42).
  10. Cation X, named 2,7-dimethvl-3,6-diazacyclohepta- 1,6-diene iodide. G. Schwarzenbach and K. Lutz, Helv. Chim. Acta 23, 1139 (1940). The authors give directions for preparation of the perchlorate; the iodide was used in our work.
  11. In our use of the filter, little measurable change in transmission occurred upon prolonged exposure to the high pressure quartz mercury arc (the light first being passed through nickel sulfate and red purple corex).
  12. Landolt-Börnstein, Pysikalisch-Chemische Tabellen Julius Springer, Berlin, 1935). Curve 141, p. 1379, Volume 111b,
  13. R. E. Hunt and W. Davis, Jr., J. Am. Chem. Soc. 69, 1415 (1947).

Alterthum, H.

H. Alterthum and M. Reger, Chem. Fabrik 6, 283 (1933); cf. R. Rompe, Acta Phys. Polonica 5, 151 (1936).

Bäckström, H. L. J.

H. L. J. Bäckström, Naturwiss. 21, 251 (1933).

Bowen, E. J.

E. J. Bowen, J. Chem. Soc. 76 (1935). Cf. Proc. Roy. Soc. A154, 349 (1936). See also, E. J. Bowen, The Chemical Aspects of Light, 2nd Ed. (Clarendon Press, Oxford, 1946). Appendices II and III.

Davis, Jr., W.

R. E. Hunt and W. Davis, Jr., J. Am. Chem. Soc. 69, 1415 (1947).

Dreisch, T.

Cf. Fig. 1, T. Dreisch, and W. Trommer, Zeits. f. physik. Chemie B37, 37 (1937).

Gibson, K. S.

K. S. Gibson, "Spectral filters," International Critical Tables, Vol. 5, p. 271 (1929).

Hunt, R. E.

R. E. Hunt and W. Davis, Jr., J. Am. Chem. Soc. 69, 1415 (1947).

Landolt-Börnstein,

Landolt-Börnstein, Pysikalisch-Chemische Tabellen Julius Springer, Berlin, 1935). Curve 141, p. 1379, Volume 111b,

Lutz, K.

Cation X, named 2,7-dimethvl-3,6-diazacyclohepta- 1,6-diene iodide. G. Schwarzenbach and K. Lutz, Helv. Chim. Acta 23, 1139 (1940). The authors give directions for preparation of the perchlorate; the iodide was used in our work.

Reger, M.

H. Alterthum and M. Reger, Chem. Fabrik 6, 283 (1933); cf. R. Rompe, Acta Phys. Polonica 5, 151 (1936).

Schwarzenbach, G.

Cation X, named 2,7-dimethvl-3,6-diazacyclohepta- 1,6-diene iodide. G. Schwarzenbach and K. Lutz, Helv. Chim. Acta 23, 1139 (1940). The authors give directions for preparation of the perchlorate; the iodide was used in our work.

Trommer, W.

Cf. Fig. 1, T. Dreisch, and W. Trommer, Zeits. f. physik. Chemie B37, 37 (1937).

Winther, Chr.

Chr. Winther, Zeits. f. Elektrochemie 43, 691 (1937).

Wood, R. W.

R. W. Wood, Phil. Mag. 5, 257 (1903).

Other (13)

H. L. J. Bäckström, Naturwiss. 21, 251 (1933).

H. Alterthum and M. Reger, Chem. Fabrik 6, 283 (1933); cf. R. Rompe, Acta Phys. Polonica 5, 151 (1936).

E. J. Bowen, J. Chem. Soc. 76 (1935). Cf. Proc. Roy. Soc. A154, 349 (1936). See also, E. J. Bowen, The Chemical Aspects of Light, 2nd Ed. (Clarendon Press, Oxford, 1946). Appendices II and III.

K. S. Gibson, "Spectral filters," International Critical Tables, Vol. 5, p. 271 (1929).

Chr. Winther, Zeits. f. Elektrochemie 43, 691 (1937).

R. W. Wood, Phil. Mag. 5, 257 (1903).

Cf. Fig. 1, T. Dreisch, and W. Trommer, Zeits. f. physik. Chemie B37, 37 (1937).

Glass Color Filters (Corning Glass Works, Corning, New York, 1948), New Edition.

Glass Color Filters (Corning Glass Works, Corning, New York, 1942) (Old Edition, Form C-247-4-42).

Cation X, named 2,7-dimethvl-3,6-diazacyclohepta- 1,6-diene iodide. G. Schwarzenbach and K. Lutz, Helv. Chim. Acta 23, 1139 (1940). The authors give directions for preparation of the perchlorate; the iodide was used in our work.

In our use of the filter, little measurable change in transmission occurred upon prolonged exposure to the high pressure quartz mercury arc (the light first being passed through nickel sulfate and red purple corex).

Landolt-Börnstein, Pysikalisch-Chemische Tabellen Julius Springer, Berlin, 1935). Curve 141, p. 1379, Volume 111b,

R. E. Hunt and W. Davis, Jr., J. Am. Chem. Soc. 69, 1415 (1947).

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