| (CX~3)~2CO,CF~3COX和CXCl~3(X=H或D)对CH(A,B)自由基的猝灭 |
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| 引用本文： | 陈从香,冉琴,俞书勤,马兴孝. (CX~3)~2CO,CF~3COX和CXCl~3(X=H或D)对CH(A,B)自由基的猝灭[J]. 化学学报, 1994, 52(2): 127-131 |
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| 作者姓名： | 陈从香 冉琴 俞书勤 马兴孝 |
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| 作者单位： | 中国科学技术大学近代化学系 |
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| 摘 要： | 本文报道室温下用266nm激光光解-荧光猝灭方法测定CH~3COCH~3,CD~3COCD~3,CF~3CO~2H,CF~3CO~2D,CHCl~3和CDCl~3分子猝灭电子激发态CH(A,B) 自由基的速率常数,考察了含不同同位素原子的猝灭剂分子对CH(A,B)猝灭的同位素效应. 实验发现,含D的分子比相应含H的分子对CH(A,B)的猝灭具有更大的速率常数
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| 关 键 词： | 反应动力学 激发态 游离基 同位素效应 分子碰撞 猝灭 激光光解 |
Collisional quenching of CH(A,B) radicals by (CX~3)~2CO, CF~3CO~2X and CXCl~3 (X=H or D) molecules |
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| CHEN CONGXIANG,RAN QIN,YU SHUQIN,MA XINGXIAO. Collisional quenching of CH(A,B) radicals by (CX~3)~2CO, CF~3CO~2X and CXCl~3 (X=H or D) molecules[J]. Acta Chimica Sinica, 1994, 52(2): 127-131 |
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| Authors: | CHEN CONGXIANG RAN QIN YU SHUQIN MA XINGXIAO |
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| Abstract: | The quenching rate constants of CH(A, B) radicals by CH3COCH3, CD3COCD3, CF3CO2H, CF3CO2D, CHCl3 and CDCl3 mols. were measured at 290 K by laser photodissocn.-fluorescence quenching technique. The discussion of isotopic effect of quencher on quenching rate constant is presented. It is found that the quenching cross sections by D substituted quencher is biger than that by H substituted one. |
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| Keywords: | REACTION KINETICS EXCITED STATE FREE RADICAL ISOTOPE EFFECT MOLECULE COLLISIONS QUENCHING |
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