A Sensitive A3B Porphyrin Nanomaterial for CO2 Detection

Abstract

Abstract: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 1 H-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 OPEN ACCESSMolecules 2014, 19 21240 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%.

Optical and electrochemical behavior of new nano-sized complexes based on gold-colloid and Co-porphyrin derivative in the presence of H 2 O 2

“…7). AFM analysis showed that the behavior of the cobalt porphyrin is in accordance with our previous studies [17,26] regarding the morphology and aggregation architectures of porphyrin derivatives from different solvents. The nanosized particles of Co-3OHPP are evenly oriented, have the shape of uniform triangular lamels and are displayed at different depths (Fig.…”

Synthesis, Characterization and Dielectric Properties of New 5-(4-Hydroxyphenyl)-10,15,20-tri-4-[2-(3-pentadecylphenoxy)ethoxy]phenyl porphyrin and Their Ni, Co and Cu Complexes

“…Specifically for compound 4c, we observe the formation of J-aggregates that showed a red-shifted absorption band at 432 nm. 37 This phenomenon indicated that the molecules of compound 4c have side-by-side interactions in an ethanolic solution. Usually, porphyrins derived from cardanol have good solubility in solvents with low polarity such as chloroform (µ = 1.04), dichloromethane (µ = 1.60) and THF (µ = 1.75), but they are insoluble in polar solvents like acetone (µ = 2.88).…”

Ekstraksi Protoporfirin IX dari Kerabang Telur Puyuh (Cortunix Cortunix) dan Kompleksasinya Dengan Ni(Ii) Serta Potensinya Sebagai Pewarna Kain Alami

“…Dalam penelitian ini protoporfirin IX muncul pada serapan kuat di 408 nm dan 2 serapan lemah di 556 nm dan 598 nm. Jika dibandingkan dengan penelitian Fagadar-cosma et al (2014) didapat serapan kuat dari senyawa turunan porfirin yakni 5-(4-pyridyl)-10,15,20-tris(3,4-dimethoxyphenyl) porfirin pada 423 nm dan terdapat 4 serapan lemah di 516 nm; 553 nm; 593 nm; dan 650 nm dalam pelarut metanol dan HCl 0,1N. Hal ini dikarenakan perbedaan subtituen dari tiap senyawa turunan porfirin yang ada sangat berpengaruh dan pelarut yang digunakan.…”