A valuable copper-supported catalyst was successfully synthesized by the hydrothermal method, and the catalytic performance of the catalyst was verified by the synthesis of propargylamine and indolazine. The reaction mechanisms of the two reactio...
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Mesoporous Organosilica Nanoparticles with Internal Metal‐Chelating Groups: Transition Metal Uptake and Gd3+ Relaxivity
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Novel mesoporous organosilica nanoparticles with internal metal-chelating diethylenetriametetraacetic acid groups (DTTA-MSNPs) were prepared by co-condensation. DTTA-MSNPs bind transition metal ions such as copper(II), cobalt (II) and gadolinium (III). In particular, DTTA-MSNPs uptake ~1.1×105 Gd3+ per particle and possess a high r1 relaxivity of 15.27 mM−1 s−1.
Abstract
We prepared novel mesoporous organosilica nanoparticles with internal metal-chelating diethylenetriametetraacetic acid groups (DTTA-MSNPs) by co-condensation and decorated them with fluorescent moieties. We studied the binding of transition metal ions such as copper(II), cobalt (II) and gadolinium (III) by DTTA-MSNPs, and found high uptake of these metals. In particular, DTTA-MSNPs uptake ~1.1×105 Gd3+ per particle and possess a high r1 relaxivity of 15.27 mM−1 s−1. Thus, DTTA-MSNPs may find applications in metal sequestration and in MR imaging and neutron capture therapy.
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