NDLI: Hyperpolarizability studies of some nonconjugated twin donor-acceptor molecules

Content Provider	Springer Nature Link
Author	Varkey, Elizabeth Chirackal Sreekumar, Krishnapillai
Copyright Year	2011
Abstract	Extensive theoretical calculation on the effects of spacer length enhancement on the second-order NLO properties of twin donor acceptor molecules having two amide units bridged by the CH$_{2}$ spacers was performed. The role of such aliphatic bridges on the Donor-Acceptor groups was computed by ZINDO/CV quantum chemical formalism. The odd-even effects were observed in twin donor acceptor systems (with two aliphatic units) linked by an alkyl spacer of varying length from n = 1 to n = 12. The system considered for the present study was N,N′-alkane-(1, n) diyl bis-4-hydroxy hexanamides. For an odd number of CH$_{2}$ spacers, the β value was an order of magnitude higher than that for the even number of CH$_{2}$ spacers. The origin for such oscillation is attributed to the similar oscillations in the dipole moment difference between the ground state and the dipole allowed state and to some extent on the variation in the oscillator strength.
Starting Page	893
Ending Page	897
Page Count	5
File Format	PDF
ISSN	02504707
Journal	Bulletin of Materials Science
Volume Number	34
Issue Number	4
e-ISSN	09737669
Language	English
Publisher	Springer-Verlag
Publisher Date	2011-10-19
Publisher Institution	Indian Academy of Sciences
Publisher Place	India
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Nonlinear optics oscillator strength optical gap polarizability Engineering Materials Science
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Materials Science

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