Photophysical And Structural Study On Nonlinear Optical Properties Of Benzoxadiazole Derivatives

Hiroyuki Suzuki; Hiroaki Hiratsuka

doi:10.1117/12.948220

21 December 1988 Photophysical And Structural Study On Nonlinear Optical Properties Of Benzoxadiazole Derivatives

Hiroyuki Suzuki, Hiroaki Hiratsuka

Proceedings Volume 0971, Nonlinear Optical Properties of Organic Materials; (1988) https://doi.org/10.1117/12.948220
Event: 32nd Annual International Technical Symposium on Optical and Optoelectronic Applied Science and Engineering, 1988, San Diego, CA, United States

Abstract

The second-order nonlinear optical properties of donor and acceptor substituted benzoxadiazole derivatives were investigated on the basis of their photophysical properties and crystal structure. Second-order molecular hyperpolarizabilities were calculated using photophysical parameters determined by absorption and fluorescence spectra measurements. They were not commensurate with the intensity of the second harmonic radiation by the powder technique. The crystal structure determination of 4-chloro-7- nitro-2,1,3-benzoxadiazole (NBD-C1), which has a phase-matched and exceptionally large second harmonic generation (SHG) among the BFZ derivatives studied, has revealed that it belongs to the monoclinic system with space group P21 and there are two independent molecules in the unit cell arranged in a noncentrosym-metric manner. The charge-transfer angles of the two independent molecules to the crystallographic symmetry axis are 48.66° and 68.79°, whose values are both very close to the optimum value of 54.74°. The existence of two independent molecules with a favorable crystal packing as well as a high crystal density are therefore responsible for the enhancement of the SHG in NBD-Cl. A single crystal of NBD-Cl grown from solution showed remarkable anisotropy in the intensity of the SHG.

Citation Download Citation

Hiroyuki Suzuki and Hiroaki Hiratsuka "Photophysical And Structural Study On Nonlinear Optical Properties Of Benzoxadiazole Derivatives", Proc. SPIE 0971, Nonlinear Optical Properties of Organic Materials, (21 December 1988); https://doi.org/10.1117/12.948220

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available