A new class of three dimensional D–π–A trigonal cryptand derivatives for second-order nonlinear optics

Pritam Mukhopadhyay; Parimal K. Bharadwaj; G. Savitha; Anu Krishnan; Puspendu K. Das

doi:10.1039/B202770B

You do not have JavaScript enabled. Please enable JavaScript to access the full features of the site or access our non-JavaScript page.

Pritam Mukhopadhyay,^a Parimal K. Bharadwaj,*^a G. Savitha,^a Anu Krishnan^b and Puspendu K. Das*^b

Author affiliations

* Corresponding authors

^a Department of Chemistry, Indian Institute of Technology, Kanpur, India
E-mail: pkb@iitk.ac.in

^b Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore, India

Abstract

Synthesis, crystal structures, linear and nonlinear optical properties of tris D–π–A cryptand derivatives with C₃ symmetry are reported. Three fold symmetry inherent in the cryptand molecules has been utilized for designing these molecules. Molecular nonlinearities have been measured by hyper-Rayleigh scattering (HRS) experiments. Among the compounds studied, L₁ adopts non-centrosymmetric crystal structure. Compounds L₁, L₂, L₃ and L₄ show a measurable SHG powder signal. These molecules are more isotropic and have significantly higher melting points than the classical p-nitroaniline based dipolar NLO compounds, making them useful for further device applications. Besides, different acceptor groups can be attached to the cryptand molecules to modulate their NLO properties.

Download options Please wait...

Supplementary files

Article information

DOI: https://doi.org/10.1039/B202770B
Article type: Paper
Submitted: 19 Mar 2002
Accepted: 09 Apr 2002
First published: 15 May 2002

Download Citation

J. Mater. Chem., 2002,12, 2237-2244

Permissions

Request permissions