Refractive indices of the optically nonlinear organic crystal (S)-3-methyl-5-nitro-N-(1-phenylethyl)-2-pyridinamine

Lochran, S. and Bailey, R.T. and Cruickshank, F.R. and Pugh, D. and Sherwood, J.N. and Simpson, G.S. and Wallis, John D. and Langley, P.J. (1998) Refractive indices of the optically nonlinear organic crystal (S)-3-methyl-5-nitro-N-(1-phenylethyl)-2-pyridinamine. Journal of Physical Chemistry A, 102 (44). pp. 8520-8525. ISSN 1089-5639. (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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The refractive indices of structurally well-characterized crystals of the new optically nonlinear organic crystal (S)-3-methyl-5-nitro-N-( I-phenylethyl)-2-pyridinamine have been measured from 480 to 660 nm and fitted to four-parameter Sellmeier equations with an accuracy of +/-3 x 10(-3) to +/-5 x 10(-3). The value of n(y) was accurately verified by the measurement of the external angle of incidence required, at the (101) plane, to observe type I phase matching with a fundamental wavelength of 1064 nm. The phase matching locus has been established and is of Hobden class eight. The values of the n(x), n(y), and n(z) refractive indices at 532 nm were found from the Sellmeier equations to be 1.690, 1.901, and 1.725, respectively, and their relative magnitudes are correlated with the molecular arrangement in the crystal lattice. This material is a member of a series of pyridinamines that can exhibit the phenomenon of frequency-dependent orientation of their dielectric axes. Since this compound crystallizes in an orthorhombic structure, rotation of the dielectric axes is precluded for symmetry reasons.

Item Type: Article
Subjects: Q Science
Q Science > QD Chemistry
Divisions: Faculties > Science Technology and Medical Studies > School of Physical Sciences
Depositing User: M.A. Ziai
Date Deposited: 29 Jun 2011 08:12
Last Modified: 08 May 2014 09:34
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