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Multi-technique structural analysis of zinc carboxylates (soaps)

Journal Article · · Dalton Transactions
DOI:https://doi.org/10.1039/d3dt00184a· OSTI ID:2469933
 [1];  [2];  [3];  [4];  [5];  [6];  [7];  [7];  [7];  [7];  [5];  [5];  [5]
  1. Univ. of Delaware, Newark, DE (United States); Ames Lab., and Iowa State Univ., Ames, IA (United States)
  2. Univ. of Delaware, Newark, DE (United States); Metropolitan Museum of Art, New York, NY (United States); City Univ. of New York (CUNY), NY (United States)
  3. National Council of Research, Rome (Italy). Institute of Heritage Science
  4. Montclair State University, Montclair, NJ (United States)
  5. Univ. of Delaware, Newark, DE (United States)
  6. Metropolitan Museum of Art, New York, NY (United States)
  7. Florida State Univ., Tallahassee, FL (United States). National High Magnetic Field Lab. (MagLab)

A series of medium- and long-chain zinc carboxylates (zinc octanoate, zinc nonanoate, zinc decanoate, zinc undecanoate, zinc dodecanoate, zinc pivalate, zinc stearate, zinc palmitate, zinc oleate, and zinc azelate) was analyzed by ultra-high-field 67Zn NMR spectroscopy up to 35.2 T, as well as 13C NMR and FTIR spectroscopy. We also report the single-crystal X-ray diffraction structures of zinc nonanoate, zinc decanoate, and zinc oleate—the first long-chain carboxylate single-crystals to be reported for zinc. The NMR and X-ray diffraction data suggest that the carboxylates exist in three distinct geometric groups, based on structural and spectroscopic parameters. The ssNMR results presented here present a future for dynamic nuclear polarization (DNP)-NMR-based minimally invasive methods for testing artwork for the presence of zinc carboxylates.

Research Organization:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Organization:
USDOE; National Science Foundation (NSF); National Institutes of Health (NIH)
Grant/Contract Number:
AC02-07CH11358
OSTI ID:
2469933
Journal Information:
Dalton Transactions, Journal Name: Dalton Transactions Journal Issue: 18 Vol. 52; ISSN 1477-9226
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English

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