A Sensitive A3B Porphyrin Nanomaterial for CO2 Detection
| Autor: | Anca Lascu, Gheorghe Fagadar-Cosma, Ileana Cernica, Mihaela Birdeanu, Anca Palade, Rodica Cristescu, Ionela Creanga, Dana Vlascici, Eugenia Fagadar-Cosma |
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| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
UV-vis spectroscopy
Porphyrins Materials science Surface Properties asymmetric A3B porphyrins Analytical chemistry Substituent Pharmaceutical Science Photochemistry sensitivity to CO2 Article Analytical Chemistry Nanomaterials lcsh:QD241-441 chemistry.chemical_compound Ultraviolet visible spectroscopy lcsh:Organic chemistry Drug Discovery Physical and Theoretical Chemistry J-aggregate Organic Chemistry Carbon Dioxide Space Flight Fluorescence Porphyrin self-assembling Nanostructures Solvent chemistry Chemistry (miscellaneous) Molecular Medicine Absorption (chemistry) AFM Hydrophobic and Hydrophilic Interactions Environmental Monitoring |
| Zdroj: | Molecules, Vol 19, Iss 12, Pp 21239-21252 (2014) Molecules Volume 19 Issue 12 Pages 21239-21252 |
| ISSN: | 1420-3049 |
| Popis: | The present report deals with the tailoring, preparation and characterization of novel nanomaterials sensitive to CO2 for use in detection of this gas during space habitation missions. A new nanostructured material based on mixed substituted asymmetrical A3B porphyrin: 5-(4-pyridyl)-10,15,20-tris(3,4-dimethoxyphenyl)-porphyrin (PyTDMeOPP) was synthesized and characterized by 1H-NMR, FT-IR, UV-vis, fluorescence, MS, HPLC and AFM. Introducing one pyridyl substituent in the 5-meso-position of porphyrin macrocycle confers some degree of hydrophilicity, which may cause self-assembly properties and a better response to increased acidity. The influence of pH and nature of the solvent upon H and J aggregates of the porphyrin are discussed. Porphyrin aggregation at the air–THF interface gave a triangular type morphology, randomly distributed but uniformly oriented. When deposition was made by multiple drop-casting operations, a network of triangles of uniform size was created and a porous structure was obtained, being reorganized finally in rings. When the deposition was made from CHCl3, ring structures ranging in internal diameter from 300 nm to 1 µm, but with the same width of the corona circular of approx. 200 nm were obtained. This porphyrin-based material, capable of generating ring aggregates in both THF and CHCl3, has been proven to be sensitive to CO2 detection. The dependence between the intensity of porphyrin UV-vis absorption and the concentration of CO2 has a good correlation of 98.4%. |
| Databáze: | OpenAIRE |
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