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Multimetallic complexes and functionalized gold nanoparticles based on a combination of d- and f-elements
Simon Sung1, Holly Holmes, Luke Wainwright
1Department of Chemistry, Imperial College London, South Kensington Campus , London SW7 2AZ, United Kingdom.
Inorganic Chemistry
|February 6, 2014
Summary
A new dithiocarbamate ligand, DO3A-(t)Bu-CS2K, was synthesized and reacted with various metal complexes. This novel ligand enables the creation of new metal-dithiocarbamate compounds, including gadolinium-based contrast agents and gold nanoparticles.
Area of Science:
- Coordination Chemistry
- Materials Science
- Nanotechnology
Background:
- Dithiocarbamate ligands are versatile chelating agents with applications in coordination chemistry.
- The development of new ligands is crucial for advancing metal-based therapeutics and diagnostics.
Purpose of the Study:
- To synthesize and characterize a novel DO3A-derived dithiocarbamate ligand, DO3A-(t)Bu-CS2K.
- To explore the reactivity of DO3A-(t)Bu-CS2K with a range of transition metal and gold complexes.
- To investigate the potential of these new complexes as MRI contrast agents and in nanoparticle synthesis.
Main Methods:
- Synthesis of DO3A-(t)Bu-CS2K from its ammonium salt precursor.
- Reaction of DO3A-(t)Bu-CS2K with ruthenium, palladium, platinum, and gold complexes.
- Formation of homoleptic metal dithiocarbamate complexes with Ni, Cu, and Co.
- Crystallographic determination of the molecular structure of [Ni(S2C-DO3A-(t)Bu)2].
- Deprotection of tert-butyl ester groups using trifluoroacetic acid.
- Complexation with Gadolinium(III) salts for MRI applications.
- Synthesis of gold nanoparticles using DO3A-(t)Bu-CS2K.
Main Results:
- DO3A-(t)Bu-CS2K was successfully synthesized and reacted with various metal precursors to form novel dithiocarbamate complexes.
- New ruthenium, palladium, platinum, gold, nickel, copper, and cobalt complexes featuring the DO3A-dithiocarbamate ligand were obtained.
- Deprotection yielded carboxylic acid derivatives suitable for further functionalization.
- Gadolinium complexes exhibited promising relaxivity values for MRI applications.
- Gold nanoparticles functionalized with the ligand were synthesized and modified.
Conclusions:
- The DO3A-derived dithiocarbamate ligand is a versatile building block for novel metal complexes.
- These complexes hold potential for applications in medical imaging and nanotechnology.
- The study demonstrates a new route to functionalized metal nanoparticles.
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