The tetratriptycenoporphyrazines revisited

Mughal, Sabeeha, Bezzu, Caterina Grazia, Carter, Emma ORCID: https://orcid.org/0000-0001-6691-2377, Pope, Simon J. A. ORCID: https://orcid.org/0000-0001-9110-9711 and McKeown, Neil B. 2013. The tetratriptycenoporphyrazines revisited. Journal of Porphyrins and Phthalocyanines 17 (08n09) , pp. 778-784. 10.1142/S1088424613500351

Full text not available from this repository.

Abstract

The spectroscopic behavior of octa-t-butyltetra-2,3-triptycenotetraazaporphyrin and some of its metal complexes (Cu2+, Zn2+ and Co2+) were examined. UV-visible and electron paramagnetic resonance spectroscopy indicate that these phthalocyanine derivatives form cofacial dimers in pentane solution. Modeling suggests that the lowest energy configuration of the dimer is a self-complementary embrace in which the two phthalocyanine cores are staggered at an angle of 45° relative to each other. This configuration results in a remarkably intense and sharp absorption band (~635 nm; ε = ~4.0 × 105 M-1.cm-1) arising from excitonic coupling within the dimer, a unique property for self-assembled dimers but analogous to the behavior of certain μ-oxo-dimers of silicon phthalocyanine. Introduction of methyl substituents into the bridgehead positions of the triptycene subunits prevents dimer formation.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Chemistry
Subjects:	Q Science > QD Chemistry
Uncontrolled Keywords:	phthalocyanine; dimer; triptycene
Publisher:	WorldSciNet
ISSN:	1088-4246
Last Modified:	10 Sep 2023 16:51
URI:	https://orca.cardiff.ac.uk/id/eprint/47974

Citation Data

Cited 2 times in Scopus. View in Scopus. Powered By Scopus® Data

Actions (repository staff only)

Edit Item