The photophysical properties of expanded porphyrins: relationships between aromaticity, molecular geometry and non-linear optical properties

Porphyrins, which consist of four pyrrolic subunits, are a ubiquitous class of naturally occurring compound with versatile photophysical properties. As an extension of the basic structure of the porphyrin macrocycle, there have been a multitude of approaches to synthesize expanded porphyrins with mo...

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Published in:Chemical communications (Cambridge, England) England), 2009-01 (3), p.261-273
Main Authors: Lim, Jong Min, Yoon, Zin Seok, Shin, Jae-Yoon, Kim, Kil Suk, Yoon, Min-Chul, Kim, Dongho
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container_title Chemical communications (Cambridge, England)
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creator Lim, Jong Min
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description Porphyrins, which consist of four pyrrolic subunits, are a ubiquitous class of naturally occurring compound with versatile photophysical properties. As an extension of the basic structure of the porphyrin macrocycle, there have been a multitude of approaches to synthesize expanded porphyrins with more than four pyrrole rings, leading to the modification of the macrocyclic ring size, planarity, number of pi-electrons and aromaticity. However, the relationship between the photophysical properties and the structures of expanded porphyrins has not been systematically investigated. The main purpose of this article is to describe the structure-property relationships of a variety of expanded porphyrins based on experimental and theoretical results, which include steady-state and time-resolved spectroscopic characterizations, non-linear absorption ability and nucleus-independent chemical shift calculations.
doi_str_mv 10.1039/b810718a
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title The photophysical properties of expanded porphyrins: relationships between aromaticity, molecular geometry and non-linear optical properties
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