Header menu link for other important links
X
Nonlinear Optical Switching in Regioregular Porphyrin Covalent Organic Frameworks
B.P. Biswal, S. Valligatla, M. Wang, T. Banerjee, N.A. Saad, , N. Chandrasekhar, D. Becker, M. Addicoat, I. SenkovskaShow More
Published in Wiley-VCH Verlag
2019
PMID: 30864202
Volume: 58
   
Issue: 21
Pages: 6896 - 6900
Abstract
Covalent organic frameworks (COFs) have garnered immense scientific interest among porous materials because of their structural tunability and diverse properties. However, the response of such materials toward laser-induced nonlinear optical (NLO) applications is hardly understood and demands prompt attention. Three novel regioregular porphyrin (Por)-based porous COFs—Por-COF-HH and its dual metalated congeners Por-COF-ZnCu and Por-COF-ZnNi—have been prepared and present excellent NLO properties. Notably, intensity-dependent NLO switching behavior was observed for these Por-COFs, which is highly desirable for optical switching and optical limiting devices. Moreover, the efficient π-conjugation and charge-transfer transition in ZnCu-Por-COF enabled a high nonlinear absorption coefficient (β=4470 cm/GW) and figure of merit (FOM=σ1/σo, 3565) value compared to other state-of-the-art materials, including molecular porphyrins (β≈100–400 cm/GW), metal–organic frameworks (MOFs; β≈0.3–0.5 cm/GW), and graphene (β=900 cm/GW). © 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
About the journal
JournalData powered by TypesetAngewandte Chemie - International Edition
PublisherData powered by TypesetWiley-VCH Verlag
ISSN14337851