Basal Plane Functionalization of Niobium Disulfide Nanosheets with Cyclopentadienyl Manganese(I) Dicarbonyl

Abstract

Basal plane-functionalized NbS 2 nanosheets were obtained using in situ photolysis to generate the coordinatively unsaturated organometallic fragment cyclopentadienyl manganese(I) dicarbonyl (CpMn(CO) 2 ). Under UV irradiation, a labile carbonyl ligand dissociates from the tricarbonyl complex, creating an open coordination site for bonding between the Mn atom and the electron-rich sulfur atoms on the surface of the NbS 2 nanosheets. In contrast, no reaction is observed with 2H-MoS 2 nanosheets under the same reaction conditions. This difference in reactivity is consistent with the electronic structure calculations, which indicate stronger bonding of the organometallic fragment to electron-poor, metallic NbS 2 than to semiconducting, electron-rich MoS 2 . X-ray photoelectron spectroscopy (XPS), Fourier-transform infrared (FTIR) spectroscopy, and powder X-ray diffraction (PXRD) were used to characterize the bonding between Mn and S atoms on the surface-functionalized nanosheets.

The Coexistence of Superconductivity and Topological Order in Van der Waals InNbS2

“…The EDS spectrum indicate that the mole ratio of the constituent elements In:Nb:S is 1:1:2 (Figure S3, Supporting Information), which confirms the elemental composition ratio and corresponding valence states in InNbS 2 single crystals, consistent with the reported data. [26][27][28][29] To investigate the crystal structure of InNbS 2 , HRSTEM characterizations were performed. The low-magnification TEM image was presented in Figure 2d.…”

Reaction Chemistry at Discrete Organometallic Fragments on Black Phosphorus

“…IR spectroscopy indicates the consumption of the starting materials, and the formation of discrete metal complexes anchored on the bP surface, 1(bP)(Cl), 2(bP), [3(bP)][Cl], and [4(bP)][BF 4 ] (Figure 2a). The utility of carbonyl ligands in probing the structure of functionalized inorganic surfaces has been previously demonstrated for many types of materials including for 2D materials, [41][42][43][44][45][46] metal oxides, [47] nanocrystals, [48] and zeolites. [49] Here, symmetry considerations, Gaussian fitting [48,50] and comparison to molecular analogues indicate a single dominant product is formed in each of the Re-functionalized nanosheets, and at least two in the more reactive Mo precursor case.…”