uh4150  (Hitachi Ltd)

Journal: Science Advances

Article Title: Super-stable two-dimensional radical conjugated metal-organic frameworks for efficient NIR-II photothermal conversion

doi: 10.1126/sciadv.aec7519

Figure Lengend Snippet: ( A ) UV-vis-NIR absorption spectra of 2D c-MOF films (self-assembled on glass-based substrates), with data normalized to the absorption peak in the NIR-II region. ( B ) Simulated absorption spectra of different molecular segments, including the small-conjugated, noncoordinated fragment without radicals (H-DAI); the small-conjugated, noncoordinated fragment with radicals (H-DAI-2H); the small-conjugated, coordinated fragment with radicals (Ni-2-H-DAI); the extended-conjugated, noncoordinated fragment without radicals (ligand, H-HATI); the extended-conjugated, noncoordinated fragment with radicals (H-HATI-2H); and the extended-conjugated and coordinated fragment with radicals (Ni-2-H-HATI). ( C ) Electron-hole distributions of H-CMOF (left) and Me-CMOF (right) corresponding to the NIR-II-related transition. ( D and E ) Effect of alkyl chains on electrostatic potential distribution (D) and molecular configuration (E) of 2D c-MOFs. ( F ) High-resolution XPS spectrum of Ni (2p) for 2D c-MOFs.

Article Snippet: The reflection spectra of 2D c-MOFs solid-state films were measured on a diffuse reflectance UV-vis-NIR absorption spectrometer (UH4150, Hitachi Co.) at the Renmin University of China Analysis Center (fig. S28A).

Techniques: