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Insight into a series of cage-like nitrogen oxides

机译:洞察一系列笼状氮氧化物

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摘要

Molecular structures were optimized by density functional theory B3LYP/6-31g(d,p), total energies were calculated at the level of second order by M?ller-Plesset perturbation theory (MP2)/6-311g(d,p), higher accuracy G3MP2B3 method and isodesmotic reactions were employed to investigate the formation enthalpies of eight cage-like nitrogen oxides, including N_2O_3 (D_(3h)), N_4O_4 (D_(2h)), N_4O_6 (D_(2h)), N_4O_6 (T_d), N_6O_6 (D_(3h)), N_6O_9 (D_(3h)), N_8O_8 (D_(4h)), N_8O_(12) (T_d), in which N_8O_8 (D_(2h)) has the highest formation enthalpy, and N_4O_6 (T_d)'s formation enthalpy is the minimum. Their stabilities were measured in terms of cage strain energy, average bond energy, in which N4O6 (Td) is the most stable compound. High positive formation enthalpies and cage strain energies indicate these cage-like nitrogen oxides may be potential high energy density materials.
机译:通过密度泛函理论B3LYP / 6-31g(d,p)优化分子结构,通过M?ller-Plesset摄动理论(MP2)/ 6-311g(d,p)计算二级能量。采用更高精度的G3MP2B3方法和等渗反应研究了八种笼状氮氧化物的形成焓,包括N_2O_3(D_(3h)),N_4O_4(D_(2h)),N_4O_6(D_(2h)),N_4O_6(T_d ),N_6O_6(D_(3h)),N_6O_9(D_(3h)),N_8O_8(D_(4h)),N_8O_(12)(T_d),其中N_8O_8(D_(2h))具有最高的形成焓,并且N_4O_6(T_d)的形成焓最小。根据笼形应变能,平均键能对它们的稳定性进行了测量,其中N4O6(Td)是最稳定的化合物。高正向形成焓和笼形应变能表明这些笼形氮氧化物可能是潜在的高能量密度材料。

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