Can I read Induction and memory of chirality in porphyrin hetero-aggregates: The role of the central metal ion on EtoBox?

Induction and memory of chirality in porphyrin hetero-aggregates: The role of the central metal ion by Angela Mammana; Massimo De Napoli; Rosaria Lauceri; Roberto Purrello is a Biochemistry, Genetics and Molecular Biology article available to read on EtoBox.

What is Induction and memory of chirality in porphyrin hetero-aggregates: The role of the central metal ion about?

The anionic H 2 TPPS porphyrin and its copper derivative, CuTPPS, form in aqueous solution hetero-aggregates with the cationic H 2 T4 porphyrin and its copper derivative, CuT4. In the presence of poly-L L-glutamate, at pH 4.0, a CD signal appears in the Soret region of the spectrum, indicating that the polypeptide has induced chirality into the structure of the aggregates. These species exhibit remarkable inertness due to the strength and number of the coulombic interactions between the anionic and the cationic porphyrins. This property allows them to preserve the chiral structure, even when the matrix changes or loses its chiral conformation, demonstrating that these aggregates are capable of memorizing the chiral information. The remarkable properties of the title systems may find various applications (chiral amplification, discrimination, and separation) that, on the other hand, require a more strict control of the aggregate dimension. Here, we show that the central copper of these macrocycles is crucial for determining the aggregate dimension.

Who reads Induction and memory of chirality in porphyrin hetero-aggregates: The role of the central metal ion?

Author

Angela Mammana; Massimo De Napoli; Rosaria Lauceri; Roberto Purrello

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0968-0896)

Published

2005

Language

EN

Field

Biochemistry, Genetics and Molecular Biology (Life Sciences)