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Spectroscopic investigations into degradation of polymer membranes for fuel cells applications.用于燃料电池应用的聚合物膜降解的光谱研究。
Spectrochim Acta A Mol Biomol Spectrosc. 2008 May;69(5):1337-43. doi: 10.1016/j.saa.2007.09.046. Epub 2007 Oct 7.
2
Resonance energy transfer from a fluorescent dye to a metal nanoparticle.从荧光染料到金属纳米颗粒的共振能量转移。
J Chem Phys. 2006 Nov 14;125(18):181102. doi: 10.1063/1.2400037.
3
Fluorescence probes used for detection of reactive oxygen species.用于检测活性氧的荧光探针。
J Biochem Biophys Methods. 2005 Dec 31;65(2-3):45-80. doi: 10.1016/j.jbbm.2005.10.003. Epub 2005 Nov 4.
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Effect of guest molecule flexibility in access to dendritic interiors.客体分子柔性对进入树枝状大分子内部的影响。
Org Lett. 2005 Jul 7;7(14):2809-12. doi: 10.1021/ol050579b.
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Probing every layer in dendrons.探测树突中的每一层。
J Am Chem Soc. 2005 Feb 23;127(7):2020-1. doi: 10.1021/ja043356+.
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Reduced flavins promote oxidative DNA damage in non-respiring Escherichia coli by delivering electrons to intracellular free iron.还原型黄素通过将电子传递给细胞内游离铁，促进非呼吸型大肠杆菌中的氧化性DNA损伤。
J Biol Chem. 2002 Sep 13;277(37):34055-66. doi: 10.1074/jbc.M203977200. Epub 2002 Jun 21.
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Novel fluorometric assay for hydroxyl radical prevention capacity using fluorescein as the probe.使用荧光素作为探针的新型羟自由基预防能力荧光测定法。
J Agric Food Chem. 2002 May 8;50(10):2772-7. doi: 10.1021/jf011480w.
8
Development and validation of an improved oxygen radical absorbance capacity assay using fluorescein as the fluorescent probe.以荧光素作为荧光探针的改进型氧自由基吸收能力测定法的开发与验证。
J Agric Food Chem. 2001 Oct;49(10):4619-26. doi: 10.1021/jf010586o.
9
New insights in the cellular processing of platinum antitumor compounds, using fluorophore-labeled platinum complexes and digital fluorescence microscopy.利用荧光团标记的铂配合物和数字荧光显微镜对铂类抗肿瘤化合物细胞处理的新见解。
J Biol Inorg Chem. 2000 Oct;5(5):655-65. doi: 10.1007/s007750000153.
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A fluorometric method for measurement of oxygen radical-scavenging activity of water-soluble antioxidants.一种用于测量水溶性抗氧化剂氧自由基清除活性的荧光法。
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采用原位荧光光谱法研究聚合物电解质膜的化学降解及降解缓解。

Investigation of polymer electrolyte membrane chemical degradation and degradation mitigation using in situ fluorescence spectroscopy.

机构信息

Department of Chemical and Biological Engineering, Illinois Institute of Technology, 10 West 33rd Street, Chicago, IL 60616, USA.

出版信息

Proc Natl Acad Sci U S A. 2012 Jan 24;109(4):1029-34. doi: 10.1073/pnas.1114672109. Epub 2012 Jan 4.

DOI:10.1073/pnas.1114672109
PMID:22219367
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC3268320/
Abstract

A fluorescent molecular probe, 6-carboxy fluorescein, was used in conjunction with in situ fluorescence spectroscopy to facilitate real-time monitoring of degradation inducing reactive oxygen species within the polymer electrolyte membrane (PEM) of an operating PEM fuel cell. The key requirements of suitable molecular probes for in situ monitoring of ROS are presented. The utility of using free radical scavengers such as CeO(2) nanoparticles to mitigate reactive oxygen species induced PEM degradation was demonstrated. The addition of CeO(2) to uncatalyzed membranes resulted in close to 100% capture of ROS generated in situ within the PEM for a period of about 7 h and the incorporation of CeO(2) into the catalyzed membrane provided an eightfold reduction in ROS generation rate.

摘要

一种荧光分子探针，6-羧基荧光素，与原位荧光光谱学结合使用，以促进在操作中的质子交换膜燃料电池（PEM）的聚合物电解质膜（PEM）内降解诱导的活性氧物种的实时监测。介绍了适用于活性氧原位监测的合适分子探针的关键要求。证明了使用如 CeO(2)纳米粒子等自由基清除剂来减轻活性氧物种诱导的 PEM 降解的有效性。将 CeO(2)添加到无催化剂的膜中，导致在 PEM 内原位生成的活性氧被近 100%捕获，持续约 7 小时，并且将 CeO(2)掺入催化膜中，活性氧的生成速率降低了 8 倍。