4.8 Article

Different Silver Nanoparticles in One Crystal: Ag210(iPrPhS)71(Ph3P)5Cl and Ag211(iPrPhS)71(Ph3P)6Cl

期刊

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 58, 期 1, 页码 195-199

出版社

WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201810772

关键词

co-crystallization; core-shell; silver nanoparticles; surface plasmon; thiol

资金

  1. National Natural Science Foundation of China [21822107, 21571115]
  2. Taishan Scholar Project of Shandong Province of China
  3. Natural Science Foundation of Shandong Province [JQ201803, ZR2017MB061]
  4. National Science Foundation of the United States [CHE-1507909]
  5. NSF [CHE-1726332, CNS-1006860, EPS-1006860, EPS-0919443]
  6. CNRS (France)

向作者/读者索取更多资源

Two pure silver nanoparticles (Ag-210((PrPhS)-Pr-i)(71)(Ph3P)(5)Cl and Ag-211((PrPhS)-Pr-i)(71)(Ph3P)(6)Cl labeled as SD/Ag210 and SD/Ag211 (SD=SunDi), were found to co-crystallize in forming compound 1. Single-crystal X-ray diffraction (SCXRD) revealed that they differ by only one Ag(PPh3). Their four-shell nanoparticles consist of three pure Ag metal shells (Ag-19@Ag-52@Ag-45) shielded by a silver-organic Ag-89((PrPhS)-Pr-i)(71)Cl[Ag(Ph3P)](n) outermost shell. The number (n) of Ag(Ph3P) is five for SD/Ag210 and six for SD/Ag211. The pseudo-fivefold symmetric Ag nanoparticles exhibit surface plasmon absorption similar to a true metallic state but at the nanoscale. This work exemplifies the important effects of phosphine in stabilizing large silver nanoparticles; and offers a platform to investigate the origin of differences in nanoscale metal materials, even differing by only one metal atom; it also sheds light on the regioselective binding of auxiliary Ph3P on the surface of silver nanoparticles.

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