CO sensor based on polypyrrole functionalized with iron porphyrin
TL;DR: In this article, a polypyrrole (PPy) was chemically functionalized with 5,10,15,20-tetraphenyl-21H,23H-porphyrin iron(III) chloride (FeTPPCl) with special interest on noxious carbon monoxide (CO) gas in ppm level.
About: This article is published in Synthetic Metals.The article was published on 2009-06-01. It has received 71 citations till now. The article focuses on the topics: Polypyrrole & Carbon monoxide.
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TL;DR: In this article, the ability of polyaniline emeraldine salt (PANI ES) from 2 to 8 phenyl rings as sensor for NH3, CO2, and CO are studied at UB3LYP/6-31G(d) level of theory.
Abstract: Density functional theory studies (DFT) have been carried out to evaluate the ability of polyaniline emeraldine salt (PANI ES) from 2 to 8 phenyl rings as sensor for NH3, CO2, and CO. The sensitivity and selectivity of nPANI ES among NH3, CO2, and CO are studied at UB3LYP/6-31G(d) level of theory. Interaction of nPANI ES with CO is studied from both O (CO(1)) and C (CO(2)) sides of CO. Interaction energy, NBO, and Mulliken charge analysis were used to evaluate the sensing ability of PANI ES for different analytes. Interaction energies are calculated and corrected for BSSE. Large forces of attraction in nPANI ES-NH3 complexes are observed compared to nPANI ES–CO2, nPANI ES-CO(1), and nPANI ES-CO(2) complexes. The inertness of +C≡O– in nPANI ES-CO(1) and nPANI ES-CO(2) complexes are also discussed. Frontier molecular orbitals and energies indicate that NH3 changes the orbital energy of nPANI ES to a greater extent compared to CO2, CO(1), and CO(2). Peaks in UV–vis and UV–vis–near-IR spectra of nPANI ES are ...
187 citations
TL;DR: In this paper, a review of the overall development of conducting polymer as chemiresistive sensing materials is presented, and the effect of different parameters influencing sensor performance such as response, gas concentration, response time, and recovery time of conducting polymers are explored.
Abstract: Detection of harmful gases is important to ensure human and environmental health. Industrial waste gases such as CO, NO2, H2S, and NH3 are of typical focus among researchers over the years. Chemiresistive sensors are suitable for detecting these harmful gases. One suitable candidate material for this sensor is the conducting polymer, which offers the advantage of room-temperature operation. This review focuses on the overall development of conducting polymer as chemiresistive sensing materials. Effects of different parameters influencing sensor performance such as response, gas concentration, response time, and recovery time of conducting polymers are explored. Different conducting polymers are compared and their affinities to specific gases are determined. An understanding of pure conducting polymers assists further exploration of these polymers in composite form. A comprehensive understanding based on an overview of literature will facilitate researchers in selecting appropriate conducting polymers for different gas sensing applications and is expected to encourage further progress in this area. © The Author(s) 2019. Published by ECS. This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License (CC BY, http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse of the work in any medium, provided the original work is properly cited. [DOI: 10.1149/2.0032003JES]
154 citations
TL;DR: This review provides the first review of FCP materials utilized for sensor fabrications highlighting, in particular, the advances in the synthesis of F CPs employing strategies for the inclusion of functional group/functional component to suit for sensing the specific analyte(s), the improvements in sensor performances and the role ofFCPs in the sensing process.
150 citations
TL;DR: The binding of CO in these rhodium complexes was found to be fully reversible, and release studies of carbon monoxide via thermogravimetric measurements have also been carried out.
Abstract: The study of probes for CO sensing of a family of binuclear rhodium(II) compounds of general formula [Rh2{(XC6H3)P(XC6H4)}n(O2CR)4–n]·L2 containing one or two metalated phosphines (in a head-to-tail arrangement) and different axial ligands has been conducted. Chloroform solutions of these complexes underwent rapid color change, from purple to yellow, when air samples containing CO were bubbled through them. The binuclear rhodium complexes were also adsorbed on silica and used as colorimetric probes for “naked eye” CO detection in the gas phase. When the gray-purple colored silica solids containing the rhodium probes were exposed to air containing increasing concentrations of CO, two colors were observed, in agreement with the formation of two different products. The results are consistent with an axial coordination of the CO molecule in one axial position (pink-orange) or in both (yellow). The crystal structure of 3·(CO) ([Rh2{(C6H4)P(C6H5)2}2(O2CCF3)2]·CO) was solved by single X-ray diffraction technique...
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TL;DR: In this article, the structure and photochemical properties of porphyrins in inorganic host materials such as clays, layered semiconductors, nanotubes, and mesoporous materials are described.
Abstract: Porphyrin derivatives are known as useful functional dyes. Porphyrin derivatives exhibit various properties in complexes with inorganic host materials that are much different from those in homogeneous solutions. In this paper, the structure and photochemical properties of porphyrins in inorganic host materials such as clays, layered semiconductors, nanotubes, and mesoporous materials are described. The photochemical properties, including the absorption properties and excited lifetimes, are much affected by the complex formation with inorganic materials. Aggregation phenomena, structural perturbations, and selected chemical reactions such as metalation and protonation affect the photochemical properties of porphyrins accommodated in inorganic host materials. The combination of porphyrin derivatives and inorganic materials should be promising for the construction of novel hybrid materials. Inorganic materials can act as novel environments for photochemical reactions. The utilization of inorganic materials for photochemical reactions is also described.
246 citations
TL;DR: In this article, a detailed vibrational analysis of the infrared and Raman spectra of doped and pristine polypyrrole is presented and the theory of the effective conjugation coordinate is applied and fully justifies the observed spectra.
Abstract: A detailed vibrational analysis of the infrared and Raman spectra of doped and pristine polypyrrole is presented. The theory of the effective conjugation coordinate is applied and fully justifies the observed spectra. The information on the structure and properties of this material derived from the proposed analysis are presented and discussed.
244 citations
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TL;DR: In this paper, a porphyrin-based NO sensor has been prepared using Mn(II)-meso-tetracarboxyphenylporphyrin linked via a spacer chain to a pyrrole unit.
106 citations