Ultrafast nonlinear optical studies of cyclo[4]naphthobipyrroles

P. T. Anusha; D. Swain; Tridib Sarma; Pradeepta K. Panda; S. Venugopal Rao

doi:10.1117/12.921744

16 May 2012 Ultrafast nonlinear optical studies of cyclo[4]naphthobipyrroles

P. T. Anusha, D. Swain, Tridib Sarma, Pradeepta K. Panda, S. Venugopal Rao

Proceedings Volume 8434, Nonlinear Optics and Applications VI; 84341D (2012) https://doi.org/10.1117/12.921744
Event: SPIE Photonics Europe, 2012, Brussels, Belgium

Abstract

Expanded porphyrins belong to the class of porphyrinoids, where the core of the porphyrin macrocycle is increased either by incorporating additional pyrrolic units, or by increasing the number of bridging carbon atoms from more than four, or a combination of both. The significance of these classes of compounds lies in their novel photophysical and nonlinear optical properties. Superior nonlinear optical coefficients are usually observed for aromatic expanded porphyrins with large number of π-electrons owing to their distinct structural features. In this regard, cyclo[8]pyrrole is unique, owing to its large planar 30-π core macrocyclic ring in its diprotonated state. Here, all the eight pyrrole units are directly linked to each other through their á-positions. Recently, we have synthesized, cyclo[4]naphthobipyrroles, a unique class of cyclo[8]pyrroles, where alternate pyrrole units are fused with naphthalene moieties. This adds more rigidity to the resultant cyclo[8]pyrrole while further extending the resultant π-conjugation. Herein, we present some of our results from the picosecond nonlinear optical studies of a â-octa-isopropyl-cyclo[4]naphthobipyrrole. The nonlinear optical coefficients were extracted from the Z-scan measurements. The values of two-photon cross-sections obtained for these molecules were in the range of 10⁴ GM.

Citation Download Citation

P. T. Anusha, D. Swain, Tridib Sarma, Pradeepta K. Panda, and S. Venugopal Rao "Ultrafast nonlinear optical studies of cyclo[4]naphthobipyrroles", Proc. SPIE 8434, Nonlinear Optics and Applications VI, 84341D (16 May 2012); https://doi.org/10.1117/12.921744

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