Visible and Near-Infrared Spectra of Chlorosomal Zinc Chlorin Self-Aggregates Dependent on Their Peripheral Substituents at the 8-Position

By Shogo Matsubara, Michio Kunieda, Ayaka Wada, Shin-ichi Sasaki, Hitoshi Tamiaki

July 28, 2017

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Title

Visible and Near-Infrared Spectra of Chlorosomal Zinc Chlorin Self-Aggregates Dependent on Their Peripheral Substituents at the 8-Position

Author

Shogo Matsubara, Michio Kunieda, Ayaka Wada, Shin-ichi Sasaki, Hitoshi Tamiaki

Year

2016

Journal

Journal of Photochemistry and Photobiology A: Chemistry

Abstract

Zinc complexes of 3-hydroxymethyl-131-oxo-chlorins possessing various π-conjugatable substituents at the 8-position were prepared by chemical modification of naturally occurring chlorophyll-a. The synthetic zinc chlorophyll-a derivatives self-aggregated in an aqueous Triton X-100 solution to give red-shifted and broadened electronic absorption bands compared with their monomeric species in tetrahydrofuran. Their self-assemblies in an aqueous micelle showed similar electronic absorption spectra to those of the main light-harvesting antennas in green photosynthetic bacteria. The self-aggregated species afforded largely bathochromically shifted Qy maxima to absorb near-infrared light.

Full Article

http://www.sciencedirect.com/science/article/pii/S1010603016304439

Instrument

J-720

Keywords

Circular dichroism, Inorganic chemistry