New Fluorescent Probes for Monitoring Polymerization Reactions: Photocuring of Acrylic Adhesives, 2

Bosch, Paula; Fernández-Arizpe, Almudena; Catalina, Fernando; Mateo, J. L.; Peinado, C.

doi:10.1002/1521-3935(20020101)203:2<336::aid-macp336>3.0.co;2-b

Cited by 20 publications

(9 citation statements)

References 9 publications

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“…4. Fluorescent Probe method 47 : For the determination of the bioadhesive potential of large number of polymer the Fluorescent probe method is used. In the technique labelling the lipid bilayer and memberane protein with the fluorescent probes (pyrene and fluorescein isothiocynate).…”

Section: Fig 4: Shear Stress Measurementmentioning

confidence: 99%

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2013

IJPSR

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As an alternative to injection pharmaceutical researcher and scientist are trying to explore transdermal and transmucosal route over the last few years. To overcome the deficiency associated with the other route of administration buccal region of oral cavity is an alternative target for the administration of choice of drug. The disadvantages relative with the oral drug delivery is the extensive presystemic metabolism, instability in acidic medium as a result inadequate absorption of the drugs. However parental route may overcome the drawback related with the oral route but these formulations have high cost, supervision is required and least patient compliance. By the buccal route the drug are directly pass through into systemic circulation, less hepatic metabolism and high bioavailability. The aim of the review article is an overview of buccal drug delivery, anatomy of oral mucosa, mechanism of drug penetration and their in-vitro and in-vivo mucoadhesion testing method.

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Section: Fig 4: Shear Stress Measurementmentioning

confidence: 99%

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2013

IJPSR

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“… Fluorescence‐conversion profiles for a photo‐cross‐linkable acrylic formulation depending on the photoinitiator used. Different reaction behavior is attributed to secondary cross‐linking reactions (adapted from reference 12a). …”

Section: Processes Measurable By Means Of Fluorescence Probesmentioning

confidence: 99%

Kinetic and Mechanistic Investigations of the Light Induced Formation of Gold Nanoparticles on the Surface of TiO₂

Mohamed

Dillert

Bahnemann

2012

Chemistry A European J

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The kinetics of the formation of gold nanoparticles on the surface of pre-illuminated TiO(2) have been investigated using stopped-flow technique and steady state UV/Vis spectroscopy. Excess electrons were loaded on the employed nanosized titanium dioxide particles by UV-A photolysis in the presence of methanol serving as hole scavenger, stored on them in the absence of oxygen and subsequently used for the reduction of Au(III) ions. The formation of gold nanoparticles with an average diameter of 5 nm was confirmed after mixing of the TiO(2) nanoparticles loaded with electrons with aqueous solution of tetrachloroaureate (HAuCl(4)) by their surface plasmon absorbance band at 530 nm, as well as by XRD and HRTEM measurements. The rate of formation of the gold nanoparticles was found to be a function of the concentration of the gold ions and the concentration of the stored electrons, respectively. The effect of PVA as a stabilizer of the gold nanoclusters was also studied. The observed kinetic behavior suggests that the formation of the gold nanoparticles on the TiO(2) surface is an autocatalytic process comprising of two main steps: 1) Reduction of the gold ions by the stored electrons on TiO(2) forming gold atoms that turn into gold nuclei. 2) Growth of the metal nuclei on the surface of TiO(2) forming the gold particles. Interestingly, at higher TiO(2) electron loading the excess electrons are subsequently transferred to the deposited gold metal particles resulting in "bleaching" of their surface plasmon band. This bleaching in the surface plasmon band is explained by the Fermi level equilibration of the Au/TiO(2) nanocomposites. Finally, the reduction of water resulting in the evolution of molecular hydrogen initiated by the excess electrons that have been transferred to the previously formed gold particles has also been observed. The mechanism of the underlying multistep electron-transfer process has been discussed in detail.

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“…During the last decades, there has been considerable and continuous interest in chain‐end‐functionalized polymers due to widespread applications in many different areas 1, 2. In various functional end groups, the fluorescent end‐caps can lend some unique and desirable properties to polymer chains, which can be used as an extremely effective tool to investigate the fundamental phenomena in polymer science, such as interaction or transition of polymer chain,3–6 conformation or morphology of block copolymers,7–9 as well as association and interface in polymer blends 10, 11. Due to the high selectivity and high sensitivity, they can also be used as probes in analytical chemistry, biochemistry, medical diagnostics, environmental sciences, and so on 12, 13.…”

Section: Introductionmentioning

confidence: 99%

Facile and Efficient Synthesis of Fluorescence‐Labeled RAFT Agents and Their Application in the Preparation of α‐,ω‐ and α,ω‐End‐Fluorescence‐Labeled Polymers

Guo¹,

Wang²,

Guo³

et al. 2012

Macro Chemistry & Physics

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The novel fl uorescence-labeled RAFT agents 2-(4-benzyl)benzoxazole benzodithioate (BBB) and 2-(4-benzyl)benzoxazole 9H-carbazole-9-carbodithioate (BBCC) were synthesized via a nucleophilic substitution reaction between commercially available 2-(4-(chloromethyl)phenyl) benzoxazole (CMPB) and excessive carbodithioate or dithiocarbamate salts. BBB bearing benzoxazole at R-group and BBCC carrying benzoxazole and carbazole at R-and Z-group can be applied to directly obtain α -and α , ω -end-fl uorescence-labeled polymers, respectively. Considering the mild reaction conditions and readily available dyes, the reactions between CMPB and dithiocarbamate or carbodithioate salts should be a very simple and promising approach to synthesize fl uorescent RAFT agents and polymers.

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New Fluorescent Probes for Monitoring Polymerization Reactions: Photocuring of Acrylic Adhesives, 2

Abstract: Variation of fluorescence intensity ratio with % conversion for the probes during the photoinitiated curing of L312.

Cited by 20 publications

References 9 publications

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Kinetic and Mechanistic Investigations of the Light Induced Formation of Gold Nanoparticles on the Surface of TiO₂

Facile and Efficient Synthesis of Fluorescence‐Labeled RAFT Agents and Their Application in the Preparation of α‐,ω‐ and α,ω‐End‐Fluorescence‐Labeled Polymers

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New Fluorescent Probes for Monitoring Polymerization Reactions: Photocuring of Acrylic Adhesives, 2

Abstract: Variation of fluorescence intensity ratio with % conversion for the probes during the photoinitiated curing of L312.

Cited by 20 publications

References 9 publications

Untitled

Untitled

Kinetic and Mechanistic Investigations of the Light Induced Formation of Gold Nanoparticles on the Surface of TiO2

Facile and Efficient Synthesis of Fluorescence‐Labeled RAFT Agents and Their Application in the Preparation of α‐,ω‐ and α,ω‐End‐Fluorescence‐Labeled Polymers

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Product

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Kinetic and Mechanistic Investigations of the Light Induced Formation of Gold Nanoparticles on the Surface of TiO₂