The optical properties of C60 single crystals, intercalated with nitrogen molecules, were studied by the spectral-luminescence method at a temperature T = 30 K and excitation by the He–Ne laser (E_exc = 1.96 eV). Intercalation was carried out at a pressure of 30 atm in a temperature range of 200–550 °C. It was found that at sorption temperatures up to 400 °C, the bands of the low-temperature luminescence spectrum of the C60–N2 solutions are broadened without significant energy shift. As a rule, this situation is typical for the case of an increased contribution of the luminescence of “deep X-traps.” The concentration of such exciton emission centers is determined by the degree of occupation of the octahedral cavities of the fullerite fcc lattice by intercalated molecules. This indicates the formation of an equilibrium C60–N2 interstitial solution as a result of physisorption. At sorption temperatures above 400 °C, a significant shift of the luminescence spectrum towards low energies with a considerable inhomogeneous broadening of spectral bands was found for the first time. The shift and significant nonuniform broadening of the luminescence bands are explained by the emergence of a chemical interaction (chemisorption) of nitrogen with fullerene molecules, with the formation of a new nitrogen-containing substance in this case.

中文翻译：

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宽温度范围内嵌入氮分子的C60单晶的低温光致发光

C60单晶的光学特性，用氮气分子插中，通过频谱致发光法研究在温度Ť  = 30 K和激励由He-Ne激光（Ë _EXC = 1.96 eV）。在温度为200–550°C的30个大气压下进行插层。研究发现，在高达400°C的吸附温度下，C60–N2溶液的低温发光光谱谱带变宽，而没有明显的能量偏移。通常，这种情况在“深X陷阱”的发光贡献增加的情况下是典型的。此类激子发射中心的浓度取决于插层分子对富勒石fcc晶格的八面体腔的占据程度。这表明由于物理吸附而形成了平衡的C60–N2间隙溶液。在高于400°C的吸附温度下，首次发现发光光谱朝着低能量的显着转变，同时光谱带出现了相当不均匀的展宽。氮与富勒烯分子之间发生化学相互作用（化学吸附），并在这种情况下形成了新的含氮物质，从而解释了发光带的移动和明显的不均匀展宽。