Solution-phase and Magnetic Approach Towards Understanding Iron Gall Inks

Published

August 13, 2012

Author(s)

Harshita Kumari, Steven R. Kline, Cindi L. Dennis, Andrew V. Mossine, Rick L. Paul, Carol A. Deakyne, Jerry L. Atwood

Abstract

Crystallization of compounds of iron with polyphenols, such as iron gall inks, has been an ongoing challenge. As with iron-gall inks, iron complexes of 1,2,3-trihydroxphenol-containing marocycles have also proved difficult to crystallize. Despite this difficulty, however, our cohesive solid-state and solution-phase study of iron-containing C-methylpyrogallol[4]arene (PgC₁) nanoassemblies has allowed us to deduce the structure of these species in both the solid and solution phases. Our combined use of SQUID, PGAA and SANS techniques indicates that, in both phase, the nanoassemblies have a tubular architecture with the iron in the framework. The magnetic analysis suggests a decanted or spiral arrangement of the iron in the 1:1.3::PgC₁:Fe tubular arrays. The SANS analyses have also revealed the importance of pyridine concentration in the formation of tubes; in the absence of excess pyridine, the nanoassemblies have a spherical architecture.

Citation

Angewandte Chemie-International Edition

Volume

51

Issue

37

Pub Type

Journals

Keywords

small-angle neutron scattering, prompt gamma activation analysis, self-assembled nanocapsules, nanotubes, SQUID

Citation

Kumari, H. , Kline, S. , Dennis, C. , Mossine, A. , Paul, R. , Deakyne, C. and Atwood, J. (2012), Solution-phase and Magnetic Approach Towards Understanding Iron Gall Inks, Angewandte Chemie-International Edition (Accessed October 10, 2025)