title: Chemoaffinity-mediated synthesis of NaRES2-based nanocrystals as versatile nano-building blocks and durable nano-pigments.
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.
authors.affiliation: Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Ding
authors.forename: Jun
authors.initials: J
authors.lastname: Gu
authors.forename: Tao
authors.initials: T
authors.lastname: Zhang
authors.forename: An-Xiang
authors.initials: AX
authors.lastname: Yin
authors.forename: Lu
authors.initials: L
authors.lastname: Yang
authors.forename: Ya-Wen
authors.initials: YW
authors.lastname: Zhang
authors.forename: Chun-Hua
authors.initials: CH
authors.lastname: Yan