...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Polyhedron: The International Journal for Inorganic and Organometallic Chemistry >Terpyridine-containing porphyrin and coordination assembly with fullerene-based pyridine for enhanced electrocatalytic oxygen evolution and photocurrent response
【24h】

Terpyridine-containing porphyrin and coordination assembly with fullerene-based pyridine for enhanced electrocatalytic oxygen evolution and photocurrent response

机译：含吡啶的卟啉和配合组件与富勒烯基吡啶，用于增强电催化氧气演化和光电流反应

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A novel terpyridine-modified porphyrin, ZnP-Pr-tpy, has been synthesized and characterized successfully using elemental analysis, mass spectrometry (MS), nuclear magnetic resonance spectroscopy (NMR), infrared spectroscopy (IR) and ultraviolet/visible spectroscopy (UV-Vis). Studies by steady-state fluorescence and UV-visible spectroscopies show that a supramolecular dyad is formed by fullerene-based pyridine (C-60-py) and the zinc porphyrin via a coordination bond, with a binding constant K of 1.18 x 10(5) M-1. The photoexcitation of ZnP-Pr-tpy causes the ground state electrons of the tpy moiety to shift to the ZnP unit via an electron-exchange process following the Dexter energy transfer mechanism. Thus, a donor-acceptor composite film, ZnP-Pr-tpy/C-60-py, was fabricated by combining the photosensitizer ZnP-Pr-tpy with C-60-py. A comparison of the over-potential at 10 mA/cm(2), the Tafel slopes and the photocurrent response under visible light irradiation showed the electrocatalytic oxygen evolution reaction (OER) and the photocurrent response to be clearly improved by the covalent modification of the porphyrin with terpyridine, and further improved by the axial coordination of C-60-py to ZnP-Pr-tpy. These improvements are attributed to increased intra- and intermolecular electron transfer, the decrease in the electrochemical impedance resulting from the axial coordination of C-60-py to ZnP-Pr-tpy and the electron-exchange in ZnP-Pr-tpy through the Dexter energy transfer mechanism under light excitation. (C) 2020 Elsevier Ltd. All rights reserved.
机译：利用元素分析、质谱（MS）、核磁共振（NMR）、红外光谱（IR）和紫外/可见光谱（UV-Vis）成功地合成并表征了一种新型三吡啶修饰卟啉ZnP-Pr-tpy。稳态荧光和紫外可见光谱研究表明，富勒烯基吡啶（C-60-py）和锌卟啉通过配位键形成超分子二元结构，结合常数K为1.18 x 10（5）M-1。ZnP-Pr-tpy的光激发使tpy部分的基态电子通过遵循Dexter能量转移机制的电子交换过程转移到ZnP单元。因此，通过将光敏剂ZnP-Pr-tpy与C-60-py结合，制备了ZnP-Pr-tpy/C-60-py施主-受主复合膜。通过比较10 mA/cm（2）下的过电位、Tafel斜率和可见光照射下的光电流响应，发现卟啉与三联吡啶的共价修饰明显改善了电催化析氧反应（OER）和光电流响应，并通过C-60-py与ZnP-Pr-tpy的轴向配位进一步改善了光电流响应。这些改善归因于分子内和分子间电子转移的增加、C-60-py与ZnP-Pr-tpy的轴向配位导致的电化学阻抗的降低以及在光激发下通过Dexter能量转移机制在ZnP-Pr-tpy中的电子交换。（C） 2020爱思唯尔有限公司版权所有。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号