Control of supramolecular porphyrin assemblies in the gel phases by metalation and axial coordination

Takanori Kishida, Norifumi Fujita, Kazuki Sada, Seiji Shinkai

Research output: Contribution to conferencePaper

Abstract

To construct various unique porphyrin assemblies, urea groups bearing-porphyrin gelators 1-H 2, 1-Cu and 1-Zn were newly synthesized. It was revealed by SEM and UV-vis spectra that introduce of Cu(II) into the porphyrin nuclei changes the stacking mode in the gel phases. 2-H 2 and 2-Cu having triethoxysilyl groups at their periphery successfully give organic/inorganic hybrids composed of porphyrin superstructures after sol-gel reaction. On the other hand, 1-Zn is found to gelatinize benzene only in the presence of piperazine. SEM images of the gels showed that increasing the stoichometry of piperazine to 1-Zn varies the morphology of 1-Zn · piperazine complex aggregates: that is, spherical structure(0 eq.), 1-D fibillar structure(0.5 eq.), 2-D sheet structure(1.0 eq.). In addtion, we have studied the viscoelasticity of 1-Zn · piperazine complex gel.

Original languageEnglish
Number of pages1
Publication statusPublished - Dec 1 2005
Event54th SPSJ Annual Meeting 2005 - Yokohama, Japan
Duration: May 25 2005May 27 2005

Other

Other54th SPSJ Annual Meeting 2005
CountryJapan
CityYokohama
Period5/25/055/27/05

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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    Kishida, T., Fujita, N., Sada, K., & Shinkai, S. (2005). Control of supramolecular porphyrin assemblies in the gel phases by metalation and axial coordination. Paper presented at 54th SPSJ Annual Meeting 2005, Yokohama, Japan.