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Related Experiment Video

Updated: Jul 16, 2026

Using Magnetometry to Monitor Cellular Incorporation and Subsequent Biodegradation of Chemically Synthetized Iron Oxide Nanoparticles

Using Magnetometry to Monitor Cellular Incorporation and Subsequent Biodegradation of Chemically Synthetized Iron Oxide Nanoparticles

Published on: February 27, 2021

Nanometer-sized molybdenum-iron oxide capsule-surface modifications: external and internal.

Achim Müller¹, Hartmut Bögge, Filipa L Sousa

¹Fakultät für Chemie der Universität, Postfach 100131, 33501 Bielefeld, Germany. a.mueller@uni-bielefeld.de

Small (Weinheim an Der Bergstrasse, Germany)

|March 27, 2007

Summary

Researchers synthesized novel nanoscale porous capsules by replacing iron ions with cerium or praseodymium. These new nanomaterials self-assemble into blackberry-like structures with controllable sizes, offering new possibilities in nanochemistry.

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Published on: January 30, 2018

Area of Science:

Inorganic Chemistry
Nanotechnology
Materials Science

Background:

The study investigates nanoscale spherical porous capsules of the {(Mo)Mo5}12{Linker}30 family.
Compound 1a, a {(Mo)Mo5}12Fe(III)30 cluster (2.3 nm diameter), serves as the starting material.

Purpose of the Study:

To synthesize new lanthanide-containing porous capsules by metal-cation exchange.
To investigate the self-assembly behavior and magnetic properties of the resulting nanomaterials.

Main Methods:

Reaction of compound 1a with lanthanide chlorides (LnCl3 x nH2O, where Ln = Ce, Pr).
Characterization of the new compounds (2 for Ce, 3 for Pr) using structural and analytical techniques.
Investigation of self-assembly into blackberry-type structures and control of nanoparticle size via pH adjustment.
Determination of magnetic properties.

Main Results:

Successful synthesis of two new porous capsules, compounds 2 (Ce) and 3 (Pr), by replacing six Fe(III) ions with Ln(III) ions.
Capsule opening and incorporation of smaller molybdate units into cavities during metal-cation exchange.
Formation of well-defined capsule skeletons with 24 Fe(III) and six Ln(III) linkers.
Self-assembly into single-layer blackberry-type structures with pH-controlled size.

Conclusions:

The study expands the diversity of nanoscale capsule assemblies.
The pH-dependent self-assembly allows for the generation of differently sized nanoparticles.
The new lanthanide-containing nanomaterials exhibit interesting magnetic properties.