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首次报道了CrC~＋、MoC~＋和WC~＋分子离子键离解能。通过测量M~＋＋XY→MX~＋＋Y的反应阈值，其中XY是已知键离解能的双原子分子，可以推出MX~＋的键离解能。利用同步辐射真空紫外光电离原理，电离过渡金属议基化合物M（CO）_6（M＝Cr、Mo和W），从而产生金属离子M~＋和金属离子碳化物MC~＋（M＝Cr，Mo和W），测量M~＋和MC~＋的出现势，结合已知的CO分子链离解能D_0（C－O）＝11.09eV和图中的关系，可以求得MC~＋的键离解能，其值分别为D_0（Cr~＋－C）＝（2．87±0．25）eV，D_0（Mo~＋－C）＝（3．39±0．30）eV和D_0（W~＋－C）＝（3．86±0．35）eV.
The ion dissociation energy of CrC ~ +, MoC ~ + and WC ~ + was reported for the first time. By measuring the reaction threshold of M ~ + + XY → MX ~ + + Y, where XY is a diatomic molecule with known bond dissociation energy, the bond dissociation energy of MX ~ + can be deduced. Using the synchrotron radiation vacuum ultraviolet photoionization principle, the metal ions M ~ + and metal ion carbides MC ~ + (M = Cr, Mo and W), the appearance potentials of M ~ + and MC ~ + were measured. According to the relationship between the dissociation energy D_0 (C-O) = 11.09eV and the known CO molecular chain, the bond dissociation The values of D_0 (Cr ~ + -C) = (2.87 ± 0.25) eV and D_0 (Mo ~ + -C) = 3.39 ± 0.30 eV and D_0 (W ~ + -C) = (3.86 ± 0.35) eV.