Interfacially polymerized metalloporphyrin thin films for colorimetric sensing of organic vapors

A Novel Porphyrin-Containing Polyimide Nanofibrous Membrane for Colorimetric and Fluorometric Detection of Pyridine Vapor

“…Previous studies have reported that the four-coordinated ZP may accept only one axial nitrogen ligand to form five-coordinated complex, inducing a shift in absorption wavelength of ZP because of the internal charge transfer process ( Figure 1 ). Moreover, ligation of nitrogen ligand at the fifth coordination site of the zinc ion altered the molecular planarity of ZP by pulling the metal ion slightly out of the porphyrin ring, which was responsible for the intensity fluctuations and appearance of new bands in the UV-vis spectrum [ 15 , 16 , 20 , 21 , 24 , 40 ]. As a result, these colorimetric and spectroscopic responses are attributed to the electronic state changes and geometrical distortion of porphyrin through strong pyridine coordination.…”

“…This substance is harmful if inhaled, ingested, or absorbed by the skin because of its toxicity and carcinogenicity [ 17 – 19 ], therefore, a sensitive and rapid detection of pyridine vapor is valuable in industrial and environmental monitoring. Zinc porphyrin was chosen for this study because of its strong affinity with nitrogen ligands to form a five-coordinated complex, which results in measurable changes in its photophysical properties [ 20 – 24 ]. Incorporation of zinc porphyrin fluorophore into a polyimide backbone facilitates pyridine vapor detection in harsh environments because of the mechanical stability, as well as the high thermal and chemical resistance, of polyimide.…”

Electropolymerized Ultrathin Chromophore Films for VOC Sensing

“…In order to streamline the fabrication of films containing a variety of metals without modifying the electropolymerization scheme to account for variations in metalloporphyrin monomer solubility, free base films were formed and then post-synthetically metalated as described previously for interfacially polymerized films (7). Spectra taken after metalation indicate the coalescence of the four Q bands to two indicating a successful metalation, Figure 3.…”

Crystallographic and (spectro)electrochemical characterizations of cobalt(II) 10-phenyl-5,15-di-p-tolylporphyrin

“…Porphyrins have been the subject of intense researches in numerous fields due to their essential role in natural processes such as photosynthesis and oxygen transport in blood. These macrocycles have found applications in material science, (electro)catalysis, energy converting devices and medicine [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. There properties can be easily adapted to specific applications by introducing new metal cations in the center of the porphyrin ring or by chemical functionalization of the porphyrin periphery [17,18].…”

“…8 51.63(41)° to 83.74(14)°) and ranges from 62.87(13)° to 70.08(16)° for 1-Co. For the tolyl groups of 1-Co, the torsion angle with the porphyrin ring ranges from 61.85(14) to 74.98(11)° which are intermediate values as compared to the analogue zinc(II) complex 1-Zn (from 84.59(9)° to 88.69(9)°, Table 2[34]) and nickel(II) porphyrin 1-Ni (from 66.69(17)° to 69.03(18)°, Table 2[35]). The Cmeso-Ctolyl/phenyl bond distances are intermediate between a single and a double bond…”