An unsymmetrical porphyrin and its metal complexes: Synthesis, spectroscopy, thermal analysis and liquid crystal properties
The synthesis and characterization of a new unsymmetrical porphyrin liquid crystal, 5-(4-stearoyloxyphenyl)phenyl-10,15,20-triphenylporphyrin (SPTPPH2) and its transition metal complexes (SPTPPM, M(II) = Zn, Fe, Co, Ni, Cu or Mn) are reported. Their structure and properties were studied by elemental...
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Serbian Chemical Society
2009-01-01
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doaj-180bd4c6cb1e403fa8fdd8460af018a32020-12-30T07:58:00ZengSerbian Chemical Society Journal of the Serbian Chemical Society0352-51391820-74212009-01-0174101097110410.2298/JSC0910097Z0352-51390910097ZAn unsymmetrical porphyrin and its metal complexes: Synthesis, spectroscopy, thermal analysis and liquid crystal propertiesZhuang Changfu0Tang Xuexin1Wang Dong2Xia Aiqing3Lian Wenhui4Shi Yuhua5Shi Tongshun6College of Chemistry, Jilin University, Changchun, P.R. ChinaCollege of Chemistry, Jilin University, Changchun, P.R. ChinaCollege of Chemistry, Jilin University, Changchun, P.R. ChinaCollege of Chemistry, Jilin University, Changchun, P.R. ChinaCollege of Chemistry, Jilin University, Changchun, P.R. ChinaCollege of Chemistry, Jilin University, Changchun, P.R. ChinaCollege of Chemistry, Jilin University, Changchun, P.R. ChinaThe synthesis and characterization of a new unsymmetrical porphyrin liquid crystal, 5-(4-stearoyloxyphenyl)phenyl-10,15,20-triphenylporphyrin (SPTPPH2) and its transition metal complexes (SPTPPM, M(II) = Zn, Fe, Co, Ni, Cu or Mn) are reported. Their structure and properties were studied by elemental analysis, and UV-Vis, IR, mass and 1H-HMR spectroscopy. Their luminescent properties were studied by excitation and emission spectroscopy. The quantum yields of the S1 → S0 fluorescence were measured at room temperature. According to thermal studies, the complexes have a higher thermal stability (no decomposition until 200°C). Differential scanning calorimetry (DSC) data and an optical textural photograph, obtained using a polarizing microscope (POM), indicate that the porphyrin ligand had liquid crystalline character and that it exhibited more than one mesophase and a low-lying phase transition temperature, with transition temperatures of 19.3 and 79.4°C; the temperature range of the liquid crystal (LC) phase of the ligand was 70.1°C.http://www.doiserbia.nb.rs/img/doi/0352-5139/2009/0352-51390910097Z.pdfporphyrintransition metal complexfluorescence spectroscopyliquid crystal |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Zhuang Changfu Tang Xuexin Wang Dong Xia Aiqing Lian Wenhui Shi Yuhua Shi Tongshun |
spellingShingle |
Zhuang Changfu Tang Xuexin Wang Dong Xia Aiqing Lian Wenhui Shi Yuhua Shi Tongshun An unsymmetrical porphyrin and its metal complexes: Synthesis, spectroscopy, thermal analysis and liquid crystal properties Journal of the Serbian Chemical Society porphyrin transition metal complex fluorescence spectroscopy liquid crystal |
author_facet |
Zhuang Changfu Tang Xuexin Wang Dong Xia Aiqing Lian Wenhui Shi Yuhua Shi Tongshun |
author_sort |
Zhuang Changfu |
title |
An unsymmetrical porphyrin and its metal complexes: Synthesis, spectroscopy, thermal analysis and liquid crystal properties |
title_short |
An unsymmetrical porphyrin and its metal complexes: Synthesis, spectroscopy, thermal analysis and liquid crystal properties |
title_full |
An unsymmetrical porphyrin and its metal complexes: Synthesis, spectroscopy, thermal analysis and liquid crystal properties |
title_fullStr |
An unsymmetrical porphyrin and its metal complexes: Synthesis, spectroscopy, thermal analysis and liquid crystal properties |
title_full_unstemmed |
An unsymmetrical porphyrin and its metal complexes: Synthesis, spectroscopy, thermal analysis and liquid crystal properties |
title_sort |
unsymmetrical porphyrin and its metal complexes: synthesis, spectroscopy, thermal analysis and liquid crystal properties |
publisher |
Serbian Chemical Society |
series |
Journal of the Serbian Chemical Society |
issn |
0352-5139 1820-7421 |
publishDate |
2009-01-01 |
description |
The synthesis and characterization of a new unsymmetrical porphyrin liquid crystal, 5-(4-stearoyloxyphenyl)phenyl-10,15,20-triphenylporphyrin (SPTPPH2) and its transition metal complexes (SPTPPM, M(II) = Zn, Fe, Co, Ni, Cu or Mn) are reported. Their structure and properties were studied by elemental analysis, and UV-Vis, IR, mass and 1H-HMR spectroscopy. Their luminescent properties were studied by excitation and emission spectroscopy. The quantum yields of the S1 → S0 fluorescence were measured at room temperature. According to thermal studies, the complexes have a higher thermal stability (no decomposition until 200°C). Differential scanning calorimetry (DSC) data and an optical textural photograph, obtained using a polarizing microscope (POM), indicate that the porphyrin ligand had liquid crystalline character and that it exhibited more than one mesophase and a low-lying phase transition temperature, with transition temperatures of 19.3 and 79.4°C; the temperature range of the liquid crystal (LC) phase of the ligand was 70.1°C. |
topic |
porphyrin transition metal complex fluorescence spectroscopy liquid crystal |
url |
http://www.doiserbia.nb.rs/img/doi/0352-5139/2009/0352-51390910097Z.pdf |
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