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Mesoporous Organosilica Nanoparticles with Internal Metal–Chelating Groups: Transition Metal Uptake and Gd3+ Relaxivity

Journal Article · · Chemistry Select
 [1];  [2];  [2];  [3]
  1. University of Utah, Salt Lake City, UT (United States); Univ. of Utah
  2. University of Pennsylvania, Philadelphia, PA (United States)
  3. University of Utah, Salt Lake City, UT (United States)
We prepared novel mesoporous organosilica nanoparticles with internal metal-chelating diethylenetriametetraacetic acid groups (DTTA-MSNPs) by co-condensation and decorated them with fluorescent moieties. Here, 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.
Research Organization:
University of Utah, Salt Lake City, UT (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0019285
OSTI ID:
2204478
Journal Information:
Chemistry Select, Journal Name: Chemistry Select Journal Issue: 34 Vol. 8; ISSN 2365-6549
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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