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Updated: Mar 11, 2026

18F-Labeling of Radiotracers Functionalized with a Silicon Fluoride Acceptor SiFA for Positron Emission Tomography

18F-Labeling of Radiotracers Functionalized with a Silicon Fluoride Acceptor SiFA for Positron Emission Tomography

Published on: January 11, 2020

Pentafluoroethylsilicic Acids.

Nico Schwarze¹, Simon Steinhauer¹, Beate Neumann¹

¹Universität Bielefeld, Fakultät für Chemie, Centrum für Molekulare Materialien, Universitätsstraße 25, 33615, Bielefeld, Germany.

Angewandte Chemie (International Ed. in English)

|November 19, 2016

Summary

This summary is machine-generated.

Stable fluorosilicic acids were synthesized by partially substituting fluorine atoms with perfluoroalkyl groups. These novel compounds, unlike their predecessors, are stable at room temperature and can be stored for extended periods.

Keywords:

fluorine fluorosilicic acid perfluoroalkyl groups silicon

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Imine Metathesis by Silica-Supported Catalysts Using the Methodology of Surface Organometallic Chemistry

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Published on: October 18, 2019

Area of Science:

Inorganic Chemistry
Fluorine Chemistry
Materials Science

Background:

Pure anhydrous hexafluorosilicic acid (H2[SiF6]) is unstable and decomposes upon desiccation.
Existing hexafluorosilicates are not stable at room temperature.
Perfluoroalkyl substitution can enhance the stability of fluorosilicic acids.

Purpose of the Study:

To synthesize and characterize stable fluorosilicic acid derivatives.
To investigate the stabilizing effect of perfluoroalkyl groups on fluorosilicic acids.
To prepare the first examples of room-temperature stable fluorosilicic acids.

Main Methods:

Synthesis of mono- and bis(pentafluoroethyl)-substituted fluorosilicic acids.
Conversion of perfluoroalkyl halosilanes (Si(C2F5)nX4-n) with aqueous hydrogen fluoride (HF).
Characterization of the resulting compounds as colorless solids.

Main Results:

Successfully prepared mono- and bis(pentafluoroethyl)-substituted fluorosilicic acids.
The synthesized compounds are stable at room temperature for several months.
These represent the first documented stable forms of fluorosilicic acids.

Conclusions:

Partial substitution with perfluoroalkyl groups significantly stabilizes fluorosilicic acids.
The synthesized compounds are the first examples of stable fluorosilicic acids at room temperature.
This research opens avenues for the study and application of previously inaccessible fluorosilicic acid derivatives.