Beijing National Laboratory for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences , No. 2 Zhongguancun Beiyijie, Beijing 100190, People's Republic of China.
ACS Nano. 2014 Apr 22;8(4):3402-11. doi: 10.1021/nn406071f. Epub 2014 Mar 26.
Porphyrins are recognized as important π-conjugated molecules correlating supramolecular chemistry, nanoscience, and advanced materials science. So far, as their supramolecular nanoassemblies are addressed, most efforts focus on the photo- or opto-related subjects. Beyond these traditional subjects, it is strongly desired to develop advanced porphyrin nanoassemblies in some other new topics of paramount importance. By means of a surfactant-assisted assembly, we herein show that porphyrins of different central metal ions, 5,10,15,20-tetra(4-pyridyl)-21H,23H-porphine (H2TPyP), zinc 5,10,15,20-tetra(4-pyridyl)-21H,23H-porphine (ZnTPyP), and oxo-[5,10,15,20-tetra(4-pyridyl)porphyrinato]titanium(IV) (TiOTPyP), could be organized to form irregular aggregates, short nanorods, and long yet straight nanofibers, respectively. Remarkably, in terms of an organic ribbon mask technique, we show that such long yet straight TiOTPyP nanofibers could be integrated into single nanofiber-based two-end nanoelectronics. Such simple nanodevices could serve as high-performance sensors of a satisfactory stability, reproducibility, and selectivity for an expeditious detection of vapor-phase H2O2. This provides a new alternative for a fast sensing of vapor-phase H2O2, which is currently an important issue in the fields of anti-terrorism, industrial healthcare, etc. In contrast to the traditional investigations focusing on the photo- or opto-related topics, our work endows porphyrin nanostructures with new opportunities as advanced nanomaterials in terms of portable yet high-performance nanoelectronic sensors, which is an issue of general concern in modern advanced nanomaterials.
卟啉被认为是与超分子化学、纳米科学和先进材料科学相关的重要π共轭分子。到目前为止，在涉及它们的超分子纳米组装体时，大多数研究工作都集中在光或光电相关的主题上。除了这些传统的主题之外，人们强烈希望在一些其他具有重要意义的新主题中开发先进的卟啉纳米组装体。通过表面活性剂辅助组装，我们在此展示了不同中心金属离子的卟啉，5,10,15,20-四（4-吡啶基）-21H,23H-卟啉（H2TPyP）、锌 5,10,15,20-四（4-吡啶基）-21H,23H-卟啉（ZnTPyP）和氧代-[5,10,15,20-四（4-吡啶基）卟啉基]钛（IV）（TiOTPyP）可以分别组装成不规则聚集体、短纳米棒和长而直的纳米纤维。值得注意的是，在有机带状掩模技术方面，我们表明，这种长而直的 TiOTPyP 纳米纤维可以集成到单根纳米纤维基的两端纳米电子器件中。这种简单的纳米器件可以作为高性能传感器，具有令人满意的稳定性、重现性和选择性，可快速检测气相 H2O2。这为快速检测气相 H2O2 提供了一种新的选择，这是反恐、工业保健等领域的一个重要问题。与传统的关注光或光电相关主题的研究相比，我们的工作赋予了卟啉纳米结构作为先进纳米材料的新机遇，在便携式高性能纳米电子传感器方面，这是现代先进纳米材料中普遍关注的问题。
