纳米金增强光敏化反应的动力学研究
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- 英文论文题名：Enhancement Effect of AuNPs on Photosensitization Reaction
- 论文作者：刘坤辉 ; 秦廷箫 ; 王仁念 ; 苏红梅
- 英文论文作者：Kunhui Liu ; Tingxiao Qin ; Rennian Wang ; Hongmei Su ; College of Chemistry ; Beijing Normal University ; Institut of Chemistry ; Chinese Academy of Sciences
- 年：2016
- 作者机构：北京师范大学化学学院;中国科学院化学研究所;
- 论文关键词：纳米金 ; 光敏化反应 ; 三重态 ; 动力学
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第四十四分会：化学动力学
- 语种：中文
- 分类号：O614.123;O643.1
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第四十四分会 ; 化学动力学
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：172k
- 原文格式：D
- 会议级别：全国
摘要
光敏剂分子的激发三重态广泛应用于光动力治疗、染料敏化太阳能电池等领域,有效增强其激发三重态强度具有重要的科学意义。金属纳米粒子具有独特的光学性质,其表面等离子共振效应在激发三重态增强方面有潜在的应用价值。我们采用瞬态吸收光谱方法,从动力学机理角度研究不同尺寸形貌的纳米金与光敏剂分子相互作用。研究发现阳离子染料可以有效诱导柠檬酸稳定的纳米金产生聚集,从而形成各种尺寸和形貌的纳米金聚集体,但是ATP保护的纳米金在阳离子染料存在时仍然处于单分散状态。通过对比染料的三重态在聚集的纳米金存在时和单分散的纳米金存在时的衰减动力学,证明只有在纳米金聚集时才会对染料的三重态产生增强效应,并且增强因子取决于纳米金聚集体的尺寸和形貌。进一步通过DNA修饰纳米金,有效控制纳米金的无序聚集,使得纳米金对光敏剂分子的激发三重态增强效应得到显著提升。在此基础上,进一步探索纳米金对光敏化产生单态氧效率的增强作用。
The surface plasmon resonance effects of metal nanoparticles show potential application in effective enhancement of the triplet excited state of photosensitizer which is widely used in photodynamic therapy and dye-sensitized solar cells. In current study, we are motivated to investigate the interaction of excited photosensitizer with gold nanoparticles(AuNPs) in different size and morphology by time-resolved laser spectroscopy. We monitor the kinetics of the triplet excited state of photosensitizers to reveal the enhancement effect induced by gold nanoparticles and their mechanisms. Furthermore, we extend our study to the enhancement effect of the ligand photosensitizers bound to the DNA-functionalized AuN Ps and explore the optimized condition to increase the quantum yield of singlet oxygen generated through photosensitization reaction by AuNPs.
The surface plasmon resonance effects of metal nanoparticles show potential application in effective enhancement of the triplet excited state of photosensitizer which is widely used in photodynamic therapy and dye-sensitized solar cells. In current study, we are motivated to investigate the interaction of excited photosensitizer with gold nanoparticles(AuNPs) in different size and morphology by time-resolved laser spectroscopy. We monitor the kinetics of the triplet excited state of photosensitizers to reveal the enhancement effect induced by gold nanoparticles and their mechanisms. Furthermore, we extend our study to the enhancement effect of the ligand photosensitizers bound to the DNA-functionalized AuN Ps and explore the optimized condition to increase the quantum yield of singlet oxygen generated through photosensitization reaction by AuNPs.
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