Aggregates Of A Cationic Porphyrin As Supramolecular Probes For Biopolymers

Document Type

Article

Publication Date

12-1-2015

Published In

Journal Of Inorganic Biochemistry

Abstract

The copper(II) derivative of the dicationic trans-bis(N-methylpyridinium-4-yl)diphenylporphyrin (t-CuPagg) forms large fractal aggregates in aqueous solution under moderate ionic strength conditions. A kinetic investigation of the aggregation process allows for a choice of experimental conditions to quickly obtain stable assemblies in solution. These positively charged aggregates are able to interact efficiently with negatively charged chiral species, (including bacterial spores) leading to induced circular dichroism signals in the Soret region of the porphyrin, now acting as a sensitive chiroptical probe. (C) 2015 Elsevier Inc. All rights reserved.

Keywords

Porphyrin, Supramolecular Aggregate, Chiroptical Sensor, Chirality, Circular Dichroism, Resonance Light-Scattering, Aqueous-Solutions, Polyglutamic Acid, Kinetic Control, Nucleic-Acids, Chiral Memory, Absorption, Growth, DNA

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