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Chemistry Letters
Vol. 43 (2014) No. 12 P 1901-1903

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http://doi.org/10.1246/cl.140812

Letter

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.

Copyright © 2014 The Chemical Society of Japan

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