TY - JOUR
T1 - Optical second harmonic generation in achiral bis(n-alkylamino)dicyanoquinodimethanes
T2 - alkyl chain length as the design element
AU - Gangopadhyay, P.
AU - Sharma, S.
AU - Rao, A. Jaganmohan
AU - Rao, D. Narayana
AU - Cohen, Shmuel
AU - Agranat, Israel
AU - Radhakrishnan, T. P.
PY - 1999
Y1 - 1999
N2 - Chain length of substituted n-alkyl groups is proposed to be a convenient design element for the generation of noncentrosymmetric crystal lattices of interest in optical second harmonic generation (SHG). Powder studies on 7,7-Bis(n-alkylamino)-8,8-dicyanoquinodimethanes indicate that moderate solid-state optical SHG is obtained when the alkyl chains are of length 4, 5, and 6, and no detectable SHG occurs when the chains are of length 0, 3, 7, 8, and 12. The significant role of the intermediate alkyl chain length in generating noncentric crystal lattices is examined using the crystal structures of the propyl, butyl, and octyl derivatives presented in this paper.
AB - Chain length of substituted n-alkyl groups is proposed to be a convenient design element for the generation of noncentrosymmetric crystal lattices of interest in optical second harmonic generation (SHG). Powder studies on 7,7-Bis(n-alkylamino)-8,8-dicyanoquinodimethanes indicate that moderate solid-state optical SHG is obtained when the alkyl chains are of length 4, 5, and 6, and no detectable SHG occurs when the chains are of length 0, 3, 7, 8, and 12. The significant role of the intermediate alkyl chain length in generating noncentric crystal lattices is examined using the crystal structures of the propyl, butyl, and octyl derivatives presented in this paper.
UR - http://www.scopus.com/inward/record.url?scp=0001046420&partnerID=8YFLogxK
U2 - 10.1021/cm980676h
DO - 10.1021/cm980676h
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AN - SCOPUS:0001046420
SN - 0897-4756
VL - 11
SP - 466
EP - 472
JO - Chemistry of Materials
JF - Chemistry of Materials
IS - 2
ER -