Journal article

Spectroscopic and Dynamic Properties of Electronically Excited Pendant Porphyrin Polymers with Backbones of Differing Flexibility

Amy L Stevens, Stephen Awuku, Kenneth P Ghiggino, Ying Hao, Sacha Novakovic, Ronald P Steer, Jonathan M White

JOURNAL OF PHYSICAL CHEMISTRY A | AMER CHEMICAL SOC | Published : 2020

Abstract

A zinc porphyrin-pendant norbornene polymer with a rigid backbone characterized by a 2:1 E/Z isomeric structure ratio has been synthesized, and its spectroscopic and photophysical properties are examined. Zinc tetraphenylporphyrin, the porphyrin-substituted norbornene monomer, and a previously reported zinc porphyrin-pendant polymer with a flexible polymethylene backbone have been used as comparators. Unlike its flexible counterpart, the rigid norbornene polymer exhibits clear exciton splitting of its Soret band, much more rapid relaxation rates of its excited singlet states, and a very small yield of an unusually short-lived triplet state. Unlike the flexible pendant polymer, which exhibits..

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Grants

Awarded by Australian Research Council Centre of Excellence in Exciton Science


Funding Acknowledgements

The authors thank the Natural Sciences and Engineering Research Council of Canada and the Australian Research Council Centre of Excellence in Exciton Science (CE170100026) for their continuing financial support. The Saskatchewan Structural Science Centre provided equipment and technical assistance. Thanks to George Belev. Professor Matthew Paige is thanked for his consultations and support. This work was made possible by support from the Australian Renewable Energy Agency which funds the project grants within the Australian Centre for Advanced Photovoltaics (ACAP). Responsibility for the views, information, or advice expressed herein is not accepted by the Australian Government.