The interest for transition metal dichalcogenides (TMDs) as two-dimensional (2D) analogues of graphene is steadily growing along with the need of efficient and easy tunable protocols for their surface functionalization. This latter aspect holds a key role in the widespread application of TMDs in various technological fields and it represents the missing step to bridge the gap between the more popular C sp2-based networks and their inorganic counterparts. Although significant steps forward have already been made in the field of TMDs functionalization (particularly for MoS2), a rational approach to their surface engineering for the generation of 2D organic-inorganic hybrids capable to accommodate various molecules featured by orthogonal groups has not been reported yet. The paper paves the way toward a new frontier for "click" chemistry in material science. It describes the post-synthetic modification (PSM) of covalently decorated MoS2 nanosheets with phenylazido pendant arms and the successful application of CuAAC chemistry (copper-mediated azide-alkyne cycloaddition) towards the generation of highly homo- and hetero-decorated MoS2 platforms. This contribution goes beyond the proof of evidence of the chemical grafting of organic groups to the surface of exfoliated MoS2 flakes through covalent C-S bonds. It also demonstrates the versatility of the hybrid samples to undergo post-synthetic modifications thus imparting multimodality to these 2D materials. Several physico-chemical [SEM microscopy, fluorescence lifetime imaging (FLIM)], spectroscopic (IR, Raman, XPS, UV-vis), and analytical tools have been combined together for the hybrids' characterization as well as for the estimation of their functionalization loading.

Surface Engineering of Chemically Exfoliated MoS2 in a "click": How to Generate Versatile Multifunctional Transition Metal Dichalcogenides-Based Platforms / Tuci, Giulia; Mosconi, Dario; Rossin, Andrea; Luconi, Lapo; Agnoli, Stefano; Righetto, Marcello; Pham-Huu, Cuong; Ba, Housseinou; Cicchi, Stefano; Granozzi, Gaetano*; Giambastiani, Giuliano. - In: CHEMISTRY OF MATERIALS. - ISSN 0897-4756. - STAMPA. - 30:(2018), pp. 8257-8269. [10.1021/acs.chemmater.8b03663]

Surface Engineering of Chemically Exfoliated MoS2 in a "click": How to Generate Versatile Multifunctional Transition Metal Dichalcogenides-Based Platforms

Tuci, Giulia
Membro del Collaboration Group
;
Luconi, Lapo
Membro del Collaboration Group
;
Cicchi, Stefano
Membro del Collaboration Group
;
Giambastiani, Giuliano
2018

Abstract

The interest for transition metal dichalcogenides (TMDs) as two-dimensional (2D) analogues of graphene is steadily growing along with the need of efficient and easy tunable protocols for their surface functionalization. This latter aspect holds a key role in the widespread application of TMDs in various technological fields and it represents the missing step to bridge the gap between the more popular C sp2-based networks and their inorganic counterparts. Although significant steps forward have already been made in the field of TMDs functionalization (particularly for MoS2), a rational approach to their surface engineering for the generation of 2D organic-inorganic hybrids capable to accommodate various molecules featured by orthogonal groups has not been reported yet. The paper paves the way toward a new frontier for "click" chemistry in material science. It describes the post-synthetic modification (PSM) of covalently decorated MoS2 nanosheets with phenylazido pendant arms and the successful application of CuAAC chemistry (copper-mediated azide-alkyne cycloaddition) towards the generation of highly homo- and hetero-decorated MoS2 platforms. This contribution goes beyond the proof of evidence of the chemical grafting of organic groups to the surface of exfoliated MoS2 flakes through covalent C-S bonds. It also demonstrates the versatility of the hybrid samples to undergo post-synthetic modifications thus imparting multimodality to these 2D materials. Several physico-chemical [SEM microscopy, fluorescence lifetime imaging (FLIM)], spectroscopic (IR, Raman, XPS, UV-vis), and analytical tools have been combined together for the hybrids' characterization as well as for the estimation of their functionalization loading.
2018
30
8257
8269
Goal 9: Industry, Innovation, and Infrastructure
Tuci, Giulia; Mosconi, Dario; Rossin, Andrea; Luconi, Lapo; Agnoli, Stefano; Righetto, Marcello; Pham-Huu, Cuong; Ba, Housseinou; Cicchi, Stefano; Granozzi, Gaetano*; Giambastiani, Giuliano
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/1149290
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