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For the first time the NEXAFS N1sand C1sspectra of composites on the basis of macrocyclic molecules zinc meso-tetrakis(4-pyridyl)porphyrin, zinc meso-tetrakis(N-methylpyridinium-4-yl)porphyrin tetraiodide and V2O5·nH2O xerogel were studied by a total electron yield method with using synchrotron radiation of Russian-Germany beamline at BESSY-II. These intercalation complexes are insoluble in water, stable and exhibit good electrochemical properties. The host-guest interaction leads to the great changes of NEXAFS N1sand C1s-spectra of the synthesized composites as compared with pristine compounds spectra. The studies show the 2.1 eV blue shift energy position and great increase oscillator strength of the π-resonance in the NEXAFS N1sspectra of pyridine cycle when ZnPor(Py)4 intercalated into V2O5·nH2O xerogel.

Insulating hexagonal boron nitride monolayers (hBN) are best known for being resistant to chemical functionalization. This property makes hBN an excellent substrate for graphene heterostructures, but limits its application as an active element in nanoelectronics where tunable electronic properties are needed. Moreover, the two-dimensional–materials’ community wishes to learn more about the adsorption and intercalation characteristics of alkali metals on hBN, which have direct relevance to several electrochemistry experiments that are envisioned with layered materials. Here we provide results on ionic functionalization of hBN/metal interfaces with K and Li dopants. By combining angle-resolved photoemission spectroscopy (ARPES), x-ray photoelectron spectroscopy, and density functional theory calculations, we show that the metallic substrate readily ionizes the alkali dopants and exposes hBN to large electric fields and band-energy shifts. In particular, if hBN is in between the negatively charged substrate and the positive alkali ion, this allows us to directly study, using ARPES, the effects of large electric fields on the electron energy bands of hBN.