Advertisement

Springer Nature is making SARS-CoV-2 and COVID-19 research free. View research | View latest news | Sign up for updates

Über die Bestimmung der Richtung von Übergangsmomenten in länglichen Molekülen aus Messungen des IR-Dichroismus, 7. Mitt. Kritische Untersuchungen zum Orientierungsgrad von Molekülen in gestreckten Polymeren

Determination of the direction of transition moments in oblong molecules by measurement of IR-dichroism, VII: Critical investigation of the degree of orientation of molecules in stretched polymers

Abstract

The dichroism of thev-NH band in carbazole, 3-indoleacetic acid, 3-indolepropionic acid, 3-indolebutyric acid and of thev-CN band in terephthalonitrile—all embeded in polyethylene foils—has been measured. The specimens were prepared in an extruder by melting polyethylene together with the compounds.

By the aid of a recently derived improved relation between extention ratio of the foils and degree of orientation (containing a parameter molecular length/molecular diameter1) which is applicable also to molecules with small linear extention, directions of transition moments could be calculated in excellent agreement with theoretical values. It is necessary however to perform the measurements on bands from non-crystalline regions of the embeded molecules.

This is a preview of subscription content, log in to check access.

Literatur

  1. 1

    G. Bauer, Mh. Chem.110, 1435 (1979).

  2. 2

    G. Bauer, Mh. Chem.102, 1789 (1971).

  3. 3

    R. D. B. Fraser, J. Chem. Physics28, 1113 (1958).

  4. 4

    G. Bauer, Mh. Chem.102, 1782 (1971).

  5. 5

    G. Bauer, Mh. Chem.102, 1797 (1971).

  6. 6

    K. Britts undP. Gum, Acta Cryst.17, 496 (1964); ref. in Structure Reports29, 726 (1964).

  7. 7

    R. D. B. Fraser undE. Suzuki, Spectrochim. Acta21, 615 (1965).

  8. 8

    H. Mikosch, Diplomarbeit, Technische Universität Wien, 1976.

Download references

Author information

Additional information

Herrn o. Prof. Dr.Anton Maschka zum 65. Geburtstag gewidmet.

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Bauer, G., Mikosch, H. Über die Bestimmung der Richtung von Übergangsmomenten in länglichen Molekülen aus Messungen des IR-Dichroismus, 7. Mitt. Kritische Untersuchungen zum Orientierungsgrad von Molekülen in gestreckten Polymeren. Monatshefte für Chemie 110, 1441–1447 (1979). https://doi.org/10.1007/BF00938299

Download citation

Keywords

  • 3-Indoles
  • IR-Dichroism
  • Molecular orientation
  • Stretched polymers
  • Terephthalo nitrile