The photoionization and photodissociative ionization processes of azoxybenzene (C12H10N2O,AOB) have been studied using the photoionization mass spectrometry with vacuum ultraviolet synchrotron radiation (SR) as the li...The photoionization and photodissociative ionization processes of azoxybenzene (C12H10N2O,AOB) have been studied using the photoionization mass spectrometry with vacuum ultraviolet synchrotron radiation (SR) as the light source. The ionization potential (IP) of this molecule and four appearance potentials (AP) of the important ionic fragments from the SR photodissociative ionization of AOB have been measured. On the basis of the IP(C12H10N2O) and AP() measured in this experiment,the dissociative energy D0(-N2OC6H5) has been evaluated. Based on the results of the mass spectroscopy of AOB,the possible channels of photodissociative ionization of AOB have been analyzed.展开更多
In this paper,we report the photoionization and photodissociative ionization processes of azobenzene(PHAB) using vacuum ultraviolet synchrotron radiation(SR) photoionization mass spectroscopy.The ionization potential(...In this paper,we report the photoionization and photodissociative ionization processes of azobenzene(PHAB) using vacuum ultraviolet synchrotron radiation(SR) photoionization mass spectroscopy.The ionization potential(IP) of the PHAB molecular and the apparant potential(AP) of the main ionic fragments from the SR photodissociative ionization of PHAB have been measured.On the basis of IP(C 12 H 10 N 2O) and AP measured in this experiment,dissociative energy D 0(OHC 6H 4N 2-C 6H 5),D 0(OHC 6H 4N 2-C 6H + 5),D 0(OHC 6H 4N + 2-C 6H 5),D 0(OHC 6H 4-N 2C 6H 5),D 0(OHC 6H 4-N 2C 6H + 5) and IP(C 6H 4N 2O) have been evaluated.Based on the results of the mass spectroscopy of PHAB,possible channel of the photodissociative ionization of PHAB was analyzed.展开更多
为研究α-蒎稀的光电离解离机制,采用同步辐射光电离质谱,在7.9~15.5 e V能量范围内研究了α-蒎稀的紫外光电离解离,对α-蒎稀的电离解离能及其碎片离子的出现势进行了理论分析.实验测得光电离效率曲线,从光电离效率曲线中获得α-蒎稀C_...为研究α-蒎稀的光电离解离机制,采用同步辐射光电离质谱,在7.9~15.5 e V能量范围内研究了α-蒎稀的紫外光电离解离,对α-蒎稀的电离解离能及其碎片离子的出现势进行了理论分析.实验测得光电离效率曲线,从光电离效率曲线中获得α-蒎稀C_(10)H_(16)的电离能和碎片离子C_9H^+_(13),C_7H^+_(10),C_3H_6^+及CHH_3^+的出现势.用Gaussian 03理论方法计算了C_(10)H_(16)和主要的光解离碎片的总能量,用高级能量计算方法计算了C_(10)H_(16)的电离能和部分碎片离子的出现势及主要的解离通道的离解能.根据实验和理论计算结果,分析了产生碎片离子的主要的解离通道.分析表明实验测得的结果与理论计算提出的C_(10)H_(16)的光解离通道获得的解离能符合得较好.展开更多
文摘The photoionization and photodissociative ionization processes of azoxybenzene (C12H10N2O,AOB) have been studied using the photoionization mass spectrometry with vacuum ultraviolet synchrotron radiation (SR) as the light source. The ionization potential (IP) of this molecule and four appearance potentials (AP) of the important ionic fragments from the SR photodissociative ionization of AOB have been measured. On the basis of the IP(C12H10N2O) and AP() measured in this experiment,the dissociative energy D0(-N2OC6H5) has been evaluated. Based on the results of the mass spectroscopy of AOB,the possible channels of photodissociative ionization of AOB have been analyzed.
文摘In this paper,we report the photoionization and photodissociative ionization processes of azobenzene(PHAB) using vacuum ultraviolet synchrotron radiation(SR) photoionization mass spectroscopy.The ionization potential(IP) of the PHAB molecular and the apparant potential(AP) of the main ionic fragments from the SR photodissociative ionization of PHAB have been measured.On the basis of IP(C 12 H 10 N 2O) and AP measured in this experiment,dissociative energy D 0(OHC 6H 4N 2-C 6H 5),D 0(OHC 6H 4N 2-C 6H + 5),D 0(OHC 6H 4N + 2-C 6H 5),D 0(OHC 6H 4-N 2C 6H 5),D 0(OHC 6H 4-N 2C 6H + 5) and IP(C 6H 4N 2O) have been evaluated.Based on the results of the mass spectroscopy of PHAB,possible channel of the photodissociative ionization of PHAB was analyzed.
基金The Scientific Research Foundation of the Education Ministry for Returned Chinese Scholars,China(No.[2013]693)the National Natural Science Foundation of China(No.11404039)
文摘为研究α-蒎稀的光电离解离机制,采用同步辐射光电离质谱,在7.9~15.5 e V能量范围内研究了α-蒎稀的紫外光电离解离,对α-蒎稀的电离解离能及其碎片离子的出现势进行了理论分析.实验测得光电离效率曲线,从光电离效率曲线中获得α-蒎稀C_(10)H_(16)的电离能和碎片离子C_9H^+_(13),C_7H^+_(10),C_3H_6^+及CHH_3^+的出现势.用Gaussian 03理论方法计算了C_(10)H_(16)和主要的光解离碎片的总能量,用高级能量计算方法计算了C_(10)H_(16)的电离能和部分碎片离子的出现势及主要的解离通道的离解能.根据实验和理论计算结果,分析了产生碎片离子的主要的解离通道.分析表明实验测得的结果与理论计算提出的C_(10)H_(16)的光解离通道获得的解离能符合得较好.
