Production and use of in situ-modified nanoparticles

US7344895B2 · kind B2 · utility

Assignee

• BAYER TECHNOLOGY SERVICES GMBH · DE

Inventors

• Burkhard Kohler · Leverkusen, DE
• Kerstin Bohmann
• Werner Hoheisel
• Markus Haase · Aachen, DE
• Stefan Haubold · Hamburg, DE
• Christiane Meyer · Hamburg, DE
• Thorsten Heidelberg · Hamburg, DE

Key dates

• Filing date: Dec 6, 2003
• Grant date: Mar 18, 2008
• Expiry date: Dec 6, 2023

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T436/13
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A process for synthesizing nanoparticles, in particular metal salt nanoparticles. To the synthesis mixture is added a modifying reagent which binds, by means of a first functional group, to the nanoparticle surface and which carries a second functional group for binding to molecules which are specifically selected in dependence on the subsequent use of the nanoparticles. This dispenses with a postsynthetic, separate, application-specific modification step. A new substance class, the pentaalkyl iminobis(methylenephosphono)carboxylates, are particularly suitable for this purpose. These modifying reagents permit the nanoparticles to grow in a specifically controlled manner and, at the same time, modify the surface of the growing nanoparticles, (in-situ) during the synthesis, such that the particles can be very readily dissolved in a large number of solvents and carry functional groups for coupling on molecules, resulting in the particles having, immediately after having been synthesized, a certain all-round usability.