Points from Foregoing Letters


    THE presence of steric inhibition of coplanarity in certain polymethine (cyanine) sensitizing dyes is discussed by S. E. Sheppard, R. H. Lambert and R. D. Walker. It is adduced as a cause of modified spectral absorption and inefficiency of optical sensitizing of silver halides.

    Rights and permissions

    Reprints and Permissions

    About this article

    Cite this article

    Points from Foregoing Letters. Nature 145, 391 (1940). https://doi.org/10.1038/145391b0

    Download citation


    By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.