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Nonlinear Optical Switching in Regioregular Porphyrin Covalent Organic Frameworks
Author(s) -
Biswal Bishnu P.,
Valligatla Sreeramulu,
Wang Mingchao,
Banerjee Tanmay,
Saad Nabil A.,
Mariserla Bala Murali Krishna,
Chandrasekhar Naisa,
Becker Daniel,
Addicoat Matthew,
Senkovska Irena,
Berger Reinhard,
Rao D. Narayana,
Kaskel Stefan,
Feng Xinliang
Publication year - 2019
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201814412
Subject(s) - porphyrin , materials science , covalent bond , graphene , nonlinear optical , covalent organic framework , limiting , optoelectronics , figure of merit , nanotechnology , porosity , nonlinear system , photochemistry , chemistry , organic chemistry , physics , composite material , mechanical engineering , quantum mechanics , engineering
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=σ 1 /σ o , 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).