A new method for transferring chemical vapor deposition (CVD)-grown monolayer graphene, to a variety of substrates is described. The method makes use of an organic/aqueous biphasic configuration, avoiding the use of any polymeric materials that can cause severe contamination problems. The graphene-coated copper foil sample (on which graphene was grown) sits at the interface between hexane and an aqueous etching solution of ammonium persulfate to remove the copper. With the aid of an Si/SiO2 substrate, the graphene layer is then transferred to a second hexane/water interface, to remove etching products. From this new location, CVD graphene is readily transferred to arbitrary substrates, including three dimensional architectures as represented by atomic force microscopy (AFM) tips and transmission electron microscopy (TEM) grids. Graphene produces a conformal layer on AFM tips, to the very end, allowing the easy production of tips for conductive AFM imaging. Graphene transferred to copper TEM grids provides large area, highly electrontransparent substrates for TEM imaging. These substrates can also be used as working electrodes for electrochemistry and high resolution wetting studies. By using scanning electrochemical cell microscopy, it is possible to make electrochemical and wetting measurements at either a free-standing graphene film or a copper-supported graphene area, and readily determine any differences in behavior.3

Exohedral cuprofullerenes with 6-, 12-, or 24-nuclearity were obtained by utilizing fluorocarboxylic/dicarboxylic acid under solvothermal conditions. The 24-nuclear molecule presents a C 60 @Cu 24 core−shell structure with a rhombicuboctahedron Cu 24 coated on the C 60 core, representing the highest nuclearity in metallofullerene. The resultant complexes show an efficient absorption of visible light as opposed to the pristine C 60 . TD-DFT calculations revealed the charge transfer from Cu(I) and O atoms to the fullerene moiety dominates the photophysical process.

White-light emission with CIE (0.32, 0.34) was realized for an o-terphenyl (oTP) molecule in its Ag3[3,5-(CF3)2Pz]3 (Pz = pyrazolate) sandwiching adduct, originating from the hybrid of fluorescence and sensitized long-afterglow phosphorescence of oTP. Density functional theory (DFT) and time-dependent DFT calculations revealed that heavy-atom effects of Ag play a crucial role in sensitization of the triplet of oTP, giving off its ultralong phosphorescence.

Cocrystal molecules obtained through simple self-assembly of small organic molecules often have unique properties that monomolecular crystals do not have. However, it is not easy to purposefully construct a series of cocrystals with specific functions. Moreover, the structures and dynamics of cocrystals are still riddles on account of the initial stage of cocrystal development. In this work, two electron donors (hexamethylbenzene and 1,3,5-trimethoxybenzene) are selected to govern the degree of charge transfer (CT) between the donor and acceptor (pyromellitic dianhydride), which may help obtain two light-emitting materials. In comparison with the monocomponent crystals, the emitting wavelengths of these cocrystals redshift from the ultraviolet range to visible region. It is worth noting that the intermolecular CT of these cocrystal materials is probed by femtosecond transient absorption (fs-TA) spectrometry. The relationship between the characteristics of emission and the stacking patterns of two specific cocrystals has been explored by fs-TA and density functional theory simulation. This work established the foundation to trace the excited-state evolution channels of the organic cocrystal materials.