Fig. 1: Construction strategy and morphology of single-layer Mn-CIN.
From: Single-layer cluster ionic-chain networks with tetragonal pores
a The schematic of the CIN construction strategy through combining the chain-like fragment of inorganic crystals with disubstituted clusters. b The structure model of the single-layer CIN fragment optimized by density functional theory (DFT). c AFM result of a monolayer Mn-CIN sheet with single-cluster thickness. Inset: porous network structure shown by STEM image (top right), molecular model of a PW10Mn2 cluster (bottom left). d Cryo-TEM image of Mn-CIN. Inset: zoomed-in view of Cryo-TEM image, wherein the nearly spherical cluster nodes exhibit higher contrast due to the presence of heavier elements, while the linkers between clusters show low contrast. e AC-HAADF-STEM image of Mn-CIN with regular, approximately square-shaped pores. f The local structure of CIN with a 4*4 cluster arrangement in the AC-HAADF-STEM image. Inset: the molecular model of a 2*2 cluster net. g FFT pattern of Mn-CIN. h STEM image of Mn-CIN sheets and corresponding EDS elemental mapping analysis of Mn, P, and W.
