Effect of π-extension and halogenation on the optical limiting properties of meso-pyrenylBODIPYdyes

Author:

Kubheka Gugu1,Mack John1,Nyokong Tebello1

Affiliation:

1. Institute for Nanotechnology Innovation, Rhodes University, Makhanda 6140, South Africa

Abstract

The lack of suitable optical limiters that cover the entire UV-visible-NIR region has motivated research to identify novel efficient and stable optical limiting materials. There has been a strong focus on attenuating the second harmonic of Nd:YAG pulsed lasers at 532 nm on the nanosecond timescale. The photophysicochemical processes of a series of mono- and di-(4-dimethylamino)styryl-meso-pyrenylBODIPY and mono- and di-(4-dimethylamino)buta-1,3-dienyl-meso-pyrenylBODIPY dyes were studied by UV-visible absorption and fluorescence emission spectroscopy, and by determining the fluorescence and triplet state lifetimes. Z-scan measurements were carried out at a fixed concentration of 10 [Formula: see text]M so that the effective nonlinear coefficients, third-order susceptibilities, second-order hyperpolarizabilities and limiting fluences of the dyes can be compared and trends in the structure-property relationships for these optical limiting parameters can be identified.

Funder

National Research Foundation (NRF) of South Africa CSUR grant

Medicinal Chemistry and Nanotechnology

Publisher

World Scientific Pub Co Pte Ltd

Subject

General Chemistry

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