Photochemical Effect of Azocompounds Acrylates Grafted in Different Polymeric Matrices

Burillo, Guillermina; Bucio, Emilio; Carreón-Castro, María del Pilar; Castillo-Rojas, Susana

doi:10.1007/s00289-005-0427-9

Cited by 9 publications

(5 citation statements)

References 21 publications

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“…PE films bearing a porphyrin unit linked through a tetraethylene glycol spacer were prepared according to Scheme . The grafting process was followed from previously reported methods of our group . Degassed solutions of AC in toluene containing a plate of PE were placed in sealed ampoules and irradiated using gamma radiations.…”

Section: Resultsmentioning

confidence: 99%

“…For the grafting process, the PE films were introduced in glass ampoules containing a solution of AC 50% in toluene . The freeze–pump–thaw cycling method was used for the degasification of the solutions.…”

Section: Methodsmentioning

confidence: 99%

“…The surface can be modified through a grafting procedure allowing the incorporation of diverse functional groups leading for example to biocompatible, conductive or adhesive polymers . Moreover, polymers with interesting photochemical properties can be obtained through the incorporation of chromophoric moieties for applications in plastic color filters or optoelectronic materials …”

Section: Introductionmentioning

confidence: 99%

“…Afterward, the formation of the modified polymer will be completed by reaction with a nucleophilic agent . The most commonly used vinyl monomer is acryloyl chloride (AC), which showed to give better yields than methacryloyl chloride . Various polymers such as polyethylene (PE) and polypropylene were used in grafting employing different doses of gamma radiation.…”

Section: Introductionmentioning

confidence: 99%

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Photoluminescent Grafted Polymers: Synthesis and Properties of a Polyethylene Matrix Covalently Linked with Porphyrin Units

Rojas‐Montoya

Vonlanthen

Ruiu

et al. 2018

Macro Chemistry & Physics

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Novel grafted polymers are prepared from commercial low‐density polyethylene (PE) films. First, precursor polymers are synthesized by reacting PE in the presence of acryloyl chloride, using gamma radiation at different radiation doses, to give precursor grafted polymers (PE‐g‐AC). A further esterification reaction between the PE‐g‐AC polymers with a new porphyrin derivative bearing a tetraethylene glycol side chain leads to the formation of novel grafted polymers containing porphyrin units (PE‐g‐AC‐PTEG). These polymers are characterized by Fourier‐transform infrared (FTIR) spectroscopy and their thermal behavior is studied by thermogravimetric analysis and differential scanning calorimetry. The optical properties of the polymers are studied by absorption and fluorescence spectroscopy. In addition, the influence of the irradiation dose on the structure and the optical properties of the polymers is discussed in detail.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Photoluminescent Grafted Polymers: Synthesis and Properties of a Polyethylene Matrix Covalently Linked with Porphyrin Units

Rojas‐Montoya

Vonlanthen

Ruiu

et al. 2018

Macro Chemistry & Physics

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“…[ 27 ] The use of gamma radiation leads to the formation of radicals on the polymeric surface that are able to react with vinyl monomers such as acryloyl chloride (AC). [ 28,29 ] Further chemical reactions with different types of monomers allow the preparation of polymers for different kind of applications. [ 30,31 ] The advantage of the grafting methodology is that the resulting polymers combine the properties of both components and the risk of release of monomers in the environment is reduced.…”

Section: Introductionmentioning

confidence: 99%

Coumarin Grafted Polyethylene Matrix as Colorimetric and Fluorescent Chemosensor for Metal Ions

Vonlanthen

Rojas‐Montoya

Cuétara‐Guadarrama

et al. 2020

Macro Chemistry & Physics

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This mechanism is based on the ability of the lone pair of electrons of tertiary amines to quench the emission of most of the known aromatic chromophores. After protonation of the amine moiety or coordination with a metal ion, the energy of its lone pair of electrons is lowered, leading to a visible increase in the fluorescence emission of the chromophore. [5,6] Coumarin based small molecules that are able to function as colorimetric and fluorescent chemosensors for anions and metal ions have been recently reported. [7-11] The advantages of using coumarin as chromophore are the high photostability, the structural diversity, and the low toxicity of its naturally occurring derivatives. [12,13] A physical immobilization of the chemosensors on a solid support is highly desirable for practical applications. [14] The advantage of such solid supported sensors is that they can be used directly as portable device in the field. Moreover, since they are easy to recover and easy to purify by washing, they can be reused several times. Monomeric or polymeric water soluble compounds have been covalently linked to different types of substrate such as quartz, metal oxide films, and silica based nanoparticles in self-assembled monolayer. [15,16] Sensors for nitroaromatic compounds [17] and metal ions [18-21] have been fabricated into devices capable of combining different outputs. [22] In addition, several types of insoluble polymers as well as hydrogels have been developed as chemosensors for metal ions such as mercury, copper, and iron. [23-26] The modification of polymeric surfaces through grafting is an efficient technique to introduce chemosensor moieties on the surface of a polymeric device. Different types of monomers can be covalently attached to the surface of polymer matrices, modifying the chemical properties of the existing polymer. Several methodologies are applied for the grafting of polymer surfaces, such as chemical or photochemical means, radiation techniques, and enzymatic reactions. [27] The use of gamma radiation leads to the formation of radicals on the polymeric surface that are able to react with vinyl monomers such as acryloyl chloride (AC). [28,29] Further chemical reactions with different types of monomers allow the preparation of polymers for different kind of applications. [30,31] The advantage of the grafting methodology is that the resulting polymers combine A coumarin-based chemosensor is synthesized and grafted onto a polyethylene (PE) surface by means of gamma radiation. The obtained polymeric film results to work as test-paper-like colorimetric sensor for the detection of Cu 2+ ions. After immersion of the grafted PE film into a solution of Cu 2+ in chloroform/methanol (8/2), a color change from colorless to green is observed by naked eye together with a quenching of the fluorescence emission. Control experiment with methoxy-grafted PE films shows no response after the immersion in the same Cu 2+ solution. The polymeric sensor can be washed and reused over several cycles for the detection of Cu 2+...

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Synthesis and photochromic property of nanoparticles with spiropyran moieties via one-step miniemulsion polymerization

Chen

Zeng

et al. 2008

Polym. Bull.

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Photochemical Effect of Azocompounds Acrylates Grafted in Different Polymeric Matrices

Cited by 9 publications

References 21 publications

Photoluminescent Grafted Polymers: Synthesis and Properties of a Polyethylene Matrix Covalently Linked with Porphyrin Units

Photoluminescent Grafted Polymers: Synthesis and Properties of a Polyethylene Matrix Covalently Linked with Porphyrin Units

Coumarin Grafted Polyethylene Matrix as Colorimetric and Fluorescent Chemosensor for Metal Ions

Synthesis and photochromic property of nanoparticles with spiropyran moieties via one-step miniemulsion polymerization

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