Chemistry Letters
Online ISSN : 1348-0715
Print ISSN : 0366-7022
Letter
Gold Nanoparticles Coated with Manganese–Porphyrin That Effectively Shorten the Longitudinal Relaxation Time of Water Molecules Depending on the Particle Size
Yutaka HitomiKazuki AokiRyosuke MiyachiJunya OhyamaMasahito KoderaTsunehiro TanakaFuminori Sugihara
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Volume 43 (2014) Issue 12 Pages 1901-1903

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Abstract

In order to develop gold nanoparticles that effectively accelerate the longitudinal relaxation of water protons, we have prepared gold nanoparticles coated with a monolayer of manganese(III)–porphyrin that can form four Au–S bonds on the gold surface. The particle size can be easily controlled via the initial S/Au ratio before reduction. The longitudinal relaxivity per Mn clearly increased with the particle size due to the rigid anchoring of manganese(III)–porphyrin via four Au–S bonds.

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© 2014 The Chemical Society of Japan
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