STUDY OF LASER PHOTOLYSIS OF P-TERT-OXOCALIX[4] ARENE

CHENG Kemei; FENG Wen; YAO Side; QIAN Suping; YUAN Lihua; HUANG Su

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STUDY OF LASER PHOTOLYSIS OF P-TERT-OXOCALIX[4] ARENE

更新时间：2023-04-07

- STUDY OF LASER PHOTOLYSIS OF P-TERT-OXOCALIX[4] ARENE
- Journal of Radiation Research and Radiation Processing Vol. 20, Issue 1, Pages: 19-26(2002)
- 作者机构：
  
  1.四川大学化学学院　成都　610064
  2.四川大学辐射物理与技术教育部重点实验室　成都　610064
  3.四川大学原子核科学技术研究所　成都　610064
  4.中国科学院上海原子核研究所辐射化学开放实验室　上海　201800
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CHENG Kemei, FENG Wen, YAO Side, et al. STUDY OF LASER PHOTOLYSIS OF P-TERT-OXOCALIX[4] ARENE. [J]. Journal of Radiation Research and Radiation Processing 20(1):19-26(2002)
DOI：

CHENG Kemei, FENG Wen, YAO Side, et al. STUDY OF LASER PHOTOLYSIS OF P-TERT-OXOCALIX[4] ARENE. [J]. Journal of Radiation Research and Radiation Processing 20(1):19-26(2002) DOI：

摘要

为了探讨杯芳烃及其衍生物作为聚合物稳定剂的稳定机理，用激光光解技术研究了308nm激发光条件下，对—叔丁基杯[4]芳烃酮的环己烷溶液在室温下的激光光解行为。观察到300nm、340nm、460nm和540nm 4个主要吸收峰，其中，300nm和460nm分别确定为酚氧自由基和阳离子自由基的吸收峰。研究发现，酚氧自由基的生成是单光子电离过程和双光子电离过程共同作用的结果。同时讨论了对—叔丁基杯[4]芳烃酮的阳离子自由基在460nm的吸收峰随溶剂和pH值变化的趋势。结果表明，对—叔丁基杯[4]芳烃酮受到激发后形成相对稳定的酚氧自由基是其作为聚合物稳定剂的原因之一。

Abstract

Reaction of p—tert—oxocalix [4]arene in cyclohexane at 308nm laser light was investigated by laser photolysis technology at room temperature in research of the reason why p—tert— oxocalix [4]arene was used as polymer stabilizer. Four main absorption were observed at 300nm,340nm,460nm and 540nm. Among them 300nm and 460nm were assigned to the absorption of phenoxy radical and cationic radical respectively. Solvent and pH dependence of cationic radical were investigated. Two—photon process mixed with one — photon process was suggested on the OH bond dissociation. The conclusion was draw that the produce of the relative stable phenoxy radical mediate when p—tert—oxocalix [4]arene was excited is one of the reason.

关键词

对—叔丁基杯[4]芳烃酮激光光解酚氧自由基阳离子自由基光电离

Keywords

P—tert—oxocalix [4] areneLaser photolysisPhenoxy radicalCationic radicalPhotonic ionizatio

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