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2020 | OriginalPaper | Chapter

3. Constructive Quantum Interference in a Heterometallated Porphyrin Nanoring

Author : Jonathan Cremers

Published in: Electronic Communication in Heterometallated Porphyrin Oligomers

Publisher: Springer International Publishing

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Abstract

The exchange interaction (J) between two spin centres is a convenient measure of through bond electronic communication. This chapter will describe the investigation of quantum interference phenomena in a bis-copper six-porphyrin nanoring (c-P6Cu2·T6) by using electron paramagnetic resonance spectroscopy via measurement of the exchange coupling between the copper centres. Using an analytical expression accounting for both dipolar and exchange coupling to simulate the time traces obtained in a double electron-electron resonance experiment, we demonstrate that J can be quantified to high precision even in the presence of significant through-space coupling (D). We show that the exchange coupling between two spin centres is increased by a factor of 4.5 in the ring structure with two parallel coupling pathways as compared to an otherwise identical system with just one coupling path. This observation is a signature of constructive quantum interference.

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previous chapter 10-Porphyrin Nanorings with Copper(II) and Zinc(II) Centres
next chapter Synthesis of Ortho, Meta and Para Bis-Copper Porphyrin Nanorings
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Metadata
Title
Constructive Quantum Interference in a Heterometallated Porphyrin Nanoring
Author
Jonathan Cremers
Copyright Year
2020
Book
Electronic Communication in Heterometallated Porphyrin Oligomers

Print ISBN: 978-3-030-39100-3

Electronic ISBN: 978-3-030-39101-0

Copyright Year: 2020

DOI
https://doi.org/10.1007/978-3-030-39101-0_3

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