Colorless Magnetic Colloidal Particles Based on an Amorphous Metal‐Organic Framework Using Holmium as the Metal Species. Issue 7 (5th April 2022)

• Record Type: Journal Article
• Authors: Fujita, Yuta; Kohaku, Kotona; Komiyama, Nao; Ujiie, Kazuya; Masu, Hyuma; Kojima, Takashi; Wadati, Hiroki; Kanoh, Hirofumi; Kishikawa, Keiki; Kohri, Michinari
• Is Part Of: ChemNanoMat. Volume 8:Issue 7(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-04-05
• Subjects: holmium -- amorphous metal-organic framework -- magnetic behavior -- colorless -- colloidal particles; Nanochemistry -- Periodicals; Nanostructured materials -- Periodicals; Nanochemistry; Nanostructured materials; Periodicals; 541.2
• DOI: 10.1002/cnma.202200078
• Languages: English
• ISSNs: 2199-692X

Abstract

Abstract: Holmium (Ho) is a lanthanide element with a high magnetic moment. Here, we create an amorphous metal‐organic framework (MOF) that has no long‐range periodic order but retains the basic components of MOF by using isophthalic acid as an organic linker and Ho as a metal species. The resulting spherical Ho‐MOF particles disperse well in a solvent and exhibit excellent magnetic properties in response to magnets. Since Ho has almost no coloring, Ho‐MOF particles are a colorless magnetic material, unlike conventional iron oxide particles. Taking advantage of the colorless property, the selective adsorption of dyes on Ho‐MOF particles can be easily visually confirmed by magnetically separating the particles. In addition, present versatile processes that enable adaptation of lanthanide elements other than Ho enable the development of colorless multifunctional MOF particles. Abstract : Amorphous metal‐organic framework (MOF) particles are designed using holmium (Ho) as the metal species. Colorless spherical Ho‐MOF particles with excellent magnetic properties can easily visually confirm the selective adsorption of dyes by magnetically separating the particles. In addition, current versatile processes that allow adaptation of lanthanide elements other than Ho will help develop colorless multifunctional MOF particles.