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Title: Parts per billion detection of uranium with a porphyrinoid-containing nanoparticle and in vivo photoacoustic imaging

Journal Article · · Analyst
DOI:https://doi.org/10.1039/c5an00207a· OSTI ID:1346160
 [1];  [1];  [2];  [3]
  1. Univ. of Texas, Austin, TX (United States). Dept. of Chemistry
  2. Stanford Univ., Stanford, CA (United States)
  3. Stanford Univ., Stanford, CA (United States) (United States). School of Medicine, Dept. of Radiology

Chemical tools that can report radioactive isotopes would be of interest to the defense community. Here in this paper we report –250 nm polymeric nanoparticles containing porphyrinoid macrocycles with and without pre-complexed depleted uranium and demonstrate that the latter species may be detected easily and with high sensitivity via photoacoustic imaging. The porphyrinoid macrocycles used in the present study are non-aromatic in the absence of the uranyl cation, but aromatic after cation complexation. We solubilized both the freebase and metalated forms of the macrocycles in poly(lactic-co-glycolic acid) and found a peak in the photoacoustic spectrum at 910 nm excitation in the case of the uranyl complex. The signal was stable for at least 15 minutes and allowed detection of uranium concentrations down to 6.2 ppb (5.7 nM) in vitro and 0.57 ppm (19 fCi; 0.52 μM) in vivo. Furthermore, to the best of our knowledge, this is the first report of a nanoparticle that detects an actinide cation via photoacoustic imaging.

Research Organization:
Univ. of Texas, Austin, TX (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
FG02-01ER15186
OSTI ID:
1346160
Journal Information:
Analyst, Vol. 140, Issue 11; ISSN 0003-2654
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 52 works
Citation information provided by
Web of Science

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Adsorption-assistant detection of trace uranyl ion with high sensitivity and selectivity in the presence of SBA-15 journal March 2018
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In Vivo Chemoselective Photoacoustic Imaging of Copper(II) in Plant and Animal Subjects journal January 2019
Porphyrins in troubled times: a spotlight on porphyrins and their metal complexes for explosives testing and CBRN defense journal January 2018
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