Chemoaffinity-mediated synthesis of NaRES2-based nanocrystals as versatile nano-building blocks and durable nano-pigments

Yi Ding; Jun Gu; Tao Zhang; An-Xiang Yin; Lu Yang; Ya-Wen Zhang; Chun-Hua Yan

doi:10.1021/ja211103b

Chemoaffinity-mediated synthesis of NaRES2-based nanocrystals as versatile nano-building blocks and durable nano-pigments

J Am Chem Soc. 2012 Feb 15;134(6):3255-64. doi: 10.1021/ja211103b. Epub 2012 Feb 1.

Authors

Yi Ding¹, Jun Gu, Tao Zhang, An-Xiang Yin, Lu Yang, Ya-Wen Zhang, Chun-Hua Yan

Affiliation

¹ Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.

PMID: 22242812
DOI: 10.1021/ja211103b

Abstract

In this article, we present a chemoaffinity-mediated synthetic strategy toward trivalent rare earth (RE) sulfides-based nanocrystals with poor affinity between cation and anion (i.e., RE(3+) and S(2-)). With the affinity mediation among multiple constituents based on hard and soft acid and base theory, we synthesized a series of monodisperse NaRES(2) nanocrystals (RE = La to Lu, Y). The revelation of the nanocrystal growth mechanism from both experimental evidence and crystal structure modeling has enabled a robust control over the sizes and morphologies of the nanocrystals. This principle of chemoaffinity has also promised the synthesis of well-defined but even more complex RE-based hetero-nanostructures (i.e. NaLaS(2)-Au, Au@NaLaS(2), NaLaS(2)@Ag(2)S, Au@NaLaS(2)@Ag(2)S) with tunable optical properties. Furthermore, this synthetic method has yielded durable NaCeS(2)-based red nano-pigments under ambient conditions, with superior brightness and permeability in polydimethylsiloxane.