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Decameric uracil complexes around Li~+

机译:Li〜+附近的十聚尿嘧啶络合物

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Electrospray ionization (ESI) in combination with mass spectrometry (MS) experiments were carried out to study decameric uracil complexes cationizedwith Li~+ ion.Aprevious study has shownthat, under specific experimental conditions, a particularly intense peak of the decamer U_(10)Li ~+ is formed, which was referred to as an indication for so-called 'magic number' cluster. In order to gain more insight on the structure of this decameric complex, here, we report experimental studies concerning the kinetics of the fragmentation. In accordance with the new experimental data, structural models were constructed and fully optimized using ab initio and density functional theory quantum chemistry calculations. The theoretical study allowed us to propose a stable gas-phase structure which is compatible with all experimental findings.
机译:结合电喷雾电离(ESI)和质谱(MS)实验研究了被Li〜+离子阳离子化的十聚尿嘧啶配合物。以前的研究表明,在特定实验条件下,十聚体U_(10)Li的峰尤为强烈形成〜+,这被称为所谓“魔数”簇的指示。为了获得对该十聚复合物的结构的更多见解,在这里,我们报道了有关碎片动力学的实验研究。根据新的实验数据,使用从头算和密度泛函理论量子化学计算,构建并完全优化了结构模型。理论研究使我们能够提出一种稳定的气相结构,该结构与所有实验结果均兼容。

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