units, SBUs) and coordinated organic ligands via the more flexible coordination bonds, which results in the controllable morphology and pore characteristic. [1f,g] Induced by these structural merits, COF and MOF have been widely applied in gas storage/separation, catalysis, and photoelectric conversion, and even the field of energy storage including Li-ion batteries, supercapacitors, and hydrogen storage. [2] In order to effectively combine the merits of COF and MOF and acquire the maximized performances, there are few recent reports regarding the hybridization of COF and MOF. [3] By introducing the as-prepared MOF into the synthetic process of COF, MOF@COF core-shell [3a,b] or MOF-coated COF [3c] hybrids were obtained. All these hybrids have been demonstrated with excellent photocatalytic performances as the effective photocatalysts/photocatalysis platforms for degradation of rhodamine B, [3a] dehydrogenation of ammonia borane, [3b] and H 2 evolution, [3c] respectively. This kind of approach (introducing the as-prepared MOF into the synthetic process of COF) would result in the comparatively simple combination of COF and MOF with core-shell or coating composite mode (no principal morphology change), and the molecular-level interlinked hybridization between COF and MOF remains unexplored.For the purpose of property optimization, intimate hybridization between two components is highly desirable, which may lead to further morphology adjustment, and consequent performance improvement. Considering the fact that organic groups from COF may also coordinate with metal ions of MOF, we design a COF/Mn-MOF hybrid structure with flower-like morphology, which is different from pristine COF or Mn-MOF. A strong synergistic effect relative to new active sites from MOF and COF for lithium storage is observed in the composite. Hollow or coreshell microspheres of MnS@N/S codoped carbon can also be derived with superior electrochemical properties.The COF/Mn-MOF composite with benchmarked pristine COF or Mn-MOF ( Figure S1a,b, Supporting Information) was characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR), Raman and 13 C nuclear magnetism measurements in Figure S2a-d (Supporting Information). All characteristic diffraction peaks for Mn-MOF [4] can be detected for COF/ Mn-MOF with clear shift to small angle for its two main peaks (2θ ≈ 10.5° and ≈21.7°), which is probably originated from the
Covalent organic frameworks (COF) or metal-organic frameworks have attracted significant attention for various applications due to their intriguing tunable micro/mesopores and composition/functionality control. Herein, a coordination-induced interlinked hybrid of imine-based covalent organic frameworks and Mn-based metal-organic frameworks (COF/Mn-MOF) based on the MnN bond is reported. The effective molecular-level coordinationinduced compositing of COF and MOF endows the hybrid with unique flower-like microsphere morphology and superior lithium-storage performances that originate from activated Mn centers an...
