In this work the porphyrin nanotubes were built by ionic self-assembly in aqueous solutions of two oppositely charged porphyrins- anionic Meso-tetra(4-sulfonatophenyl)porphine dihydrochloride (TPPS4) and cationic Meso-tetra(4-pyridyl)porphine (T4MPyP). The electrostatic forces between these porphyrin blocks contribute to the formation of porphyrin aggregates in the form of nanotubes, enhance the structural stability of these nanostructures. The porphyrin nanotubes obtained are hollow structures with the length of 300 nm and diameter 50 nm. Photocatalytic porphyrins are used to reduce metal complexes from aqueous solution and to control the deposition of Au from AuHCl₄ onto porphyrin nanotubes. Porphyrin nanotubes are shown to reduce metal complexes and deposit gold selectively onto the outer surface of the tubes. The colloidal solution of gold nanoparticles lead to gold strip inside nanotube composite structures. Solution and monolayer spectra for the UV–vis experiments were obtained on an Ocean Optics diode array spectrophotometer to confirm the J-aggregates and nanotubes formation. The porphyrin nanotubes structure was investigated by Hitachi S-4800 electron microscope in STEM mode and by AFM imaging. The electrical properties of porphyrin nanotubes and nanotubes functionalized by gold were investigated by conductivity imaging using Scanning Probe Microscopy. It was demonstrated the possibility to build porphyrin nanotubes from the anionic Meso-tetra(4-sulfonatophenyl)porphine dihydrochloride and cationic HematoporphyrinIX dihydrochloride porphyrins and to deposit gold on the nanotubes from gold salt solution and inside the porphyrin tubes from gold nanoparticles (3-15 nm) colloidal suspensions. The results obtained in the work open a possibilities to build a new kind of nanodevices for photovoltaics, nanophotonics ant sensing.

• Legal notice:
  

  Copyright (c) Pielaszek Research, all rights reserved.
  The above materials, including auxiliary resources, are subject to Publisher's copyright and the Author(s) intellectual rights. Without limiting Author(s) rights under respective Copyright Transfer Agreement, no part of the above documents may be reproduced without the express written permission of Pielaszek Research, the Publisher. Express permission from the Author(s) is required to use the above materials for academic purposes, such as lectures or scientific presentations.
  In every case, proper references including Author(s) name(s) and URL of this webpage: https://science24.com/paper/11382 must be provided.

1. Tip lenght influence on the shear force imaging in liquids
2. Porphyrin controlled anisotropic and dendritic growth of thalium chloride crystals
3. Photoluminescence from ZnO films prepared by wire explosion technique
4. Deposition of nanostructured thallium sulfide layers on organic and inorganic surfaces in a solution of higher polythionic acid
5. Formation of thalium sulfide layers on polyethilene (PE) sulfured in a solution of higher polythionic acid
6. Assemblies of iron and TPPS porphyrins investigated by TEM, AFM and UV/vis spectroscopy