An air-stable anionic two-dimensional semiconducting metal-Thiolate network and its exfoliation into ultrathin few-layer nanosheets

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

11 Scopus Citations
View graph of relations

Author(s)

  • Jun He
  • Wei-Ming Liao
  • Gang Xu
  • Matthias Zeller
  • Zhengtao Xu

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)3645-3648
Journal / PublicationChemical Communications
Volume56
Issue number25
Online published17 Feb 2020
Publication statusPublished - 28 Mar 2020

Abstract

The black, small-bandgap semiconducting framework Eu-dfdmat features extensive Eu3+-sulfur bridges from the linear linker 2,5-difluoro-3,6-dimercaptoterephthalate (dfdmt). Each Eu center is chelated to four dfdmt linkers to form an anionic coordination sphere involving four carboxyl O and four mercapto S centers (EuO4S4), wherein the charge buildup can be alleviated by the electron-withdrawing fluoro groups. The extensive metal-linker bonding, together with a trace of Eu2+ species, appears to boost electronic interaction in the 2D net, generating a small band gap of 1.31 eV (946 nm), albeit a modest conductivity (e.g., 10-6 S m-1). The crystals also exhibit persistent EPR signals indicative of organic radicals (g = 2.002). The Eu-dfdmt solid are stable in air and can be exfoliated into ultrathin nanosheets (ca. 5 nm; 6-8 layers).

Citation Format(s)

An air-stable anionic two-dimensional semiconducting metal-Thiolate network and its exfoliation into ultrathin few-layer nanosheets. / Zeng, Qi; Wang, Lei; Huang, Yitao et al.

In: Chemical Communications, Vol. 56, No. 25, 28.03.2020, p. 3645-3648.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review