1-Acetylferroceneoxime-based photoacid generators: application towards sol–gel transformation and development of photoresponsive polymer for controlled wettability and patterned surfaces

Ikbal, Mohammed; Banerjee, Rakesh; Barman, Shrabani; Atta, Sanghamitra; Dhara, Dibakar; Singh, N. D. Pradeep

doi:10.1039/c4tc00203b

Cited by 10 publications

(9 citation statements)

References 38 publications

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“…Light represents an appealing stimulus that can alter the dimensional or structural composition of materials according to a contactless way and with no change in the surrounding environment . Light also offers excellent spatial and temporal control over the energy input required for tuning material properties . In addition, compared to other external stimuli such as heat, pressure, pH, electric and magnetic fields, light is a fascinating stimulus, as it is a green energy, as its intensity, wavelength, and polarization direction can be modulated in a precise and convenient way.…”

Section: Photoswitching Mechanisms and Compoundsmentioning

confidence: 99%

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Light‐Responsive Polymer Membranes

Pantuso

Filpo

Nicoletta

2019

Advanced Optical Materials

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Stimuli‐responsive polymer membranes have gained particular attention for the ability to tune opportunely their physicochemical properties under the application of an external stimulus. Heat, pH value, ionic strength, pressure, humidity, electric and magnetic fields, antigen/antibody interactions, chemical reactions, and light can be used as triggers for specific responses in polymer membranes. In particular, light is a fascinating stimulus, as it is a green energy, which can be modulated in a precise and convenient way. In addition, it allows remote and contactless interactions without changing the original chemical environment. This review reports recent progresses in light‐responsive polymer membranes with particular attention to chemical groups and responsive mechanisms.

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Section: Photoswitching Mechanisms and Compoundsmentioning

confidence: 99%

“…Before UV irradiation the surface showed a CA ≈ 145° indicating that the surface was hydrophobic. UV light irradiation (≥365 nm) changed the surface wettability (CA ≈ 35°) and caused the polymer decomposition with the photogeneration of polar CO 2 H groups …”

Section: Light Adaptive Gatesmentioning

confidence: 99%

Light‐Responsive Polymer Membranes

Pantuso

Filpo

Nicoletta

2019

Advanced Optical Materials

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“…Nonionic PAGs have gained much attention because of their wide range of solubility in organic solvents and polymer films . Considering the development of PAGs, designing novel PAGs that are i‐line and g‐line sensitive has been becoming more important because of the wide applicability of photoinduced acid catalyzed photochemical systems . The design of highly photosensitive (i.e., high quantum yield) and practical (i.e., as cationic photoinitiators) PAGs is the key to the development and application of these compounds .…”

Section: Introductionmentioning

confidence: 99%

D‐π‐a‐type oxime sulfonate photoacid generators for cationic polymerization under UV–visible LED irradiation

Jin

Zhou

et al. 2018

J. Polym. Sci. Part A: Polym. Chem.

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Four D-p-A-type nonionic oxime sulfonate photoacid generators (PAGs) have been designed and synthesized for use in light-emitting diode (LED) excitable cationic photoinitiators, in which N,N-diphenylamino was used as electron donor with trifluoroacetophenone-based oxime sulfonates (trifluoromethanoesulfonate and p-toluenesulfonate) as electron acceptor and substituted fluorene and biphenyl groups as the p-conjugated systems. PAG-Ben-Tol (with biphenyl and p-toluenesulfonate) and PAG-Flu-Tol (with fluorene and p-toluenesulfonate) showed high quantum yields of photoacid generation (0.33-0.50) and very good thermal stability (over 250 8C). The absorbance spectra of these PAGs were consistent with the emission spectra of commercially gained UV-visible LED light sources.The potential of these PAGs for cationic photoinitiators was tested in two cationic monomer systems. These PAGs needed low light intensity and low concentration for photopolymerization with high conversions of monomer, for example, over 80%, gained at 3.0 mW cm 22 from 365 to 470 nm LEDs. The photochemical mechanisms of these PAGs are comprehensively investigated and discussed in detail.

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“…TPStaurine, Ca 2+ would be isolated from calcium carbonate, and it formed ion cross-linkage of the sodium alginate, giving gelation [17,18]. Though some photopatterning of ecosystem materials were reported by using PAGs [32][33][34], water-soluble PAmG showed the possibility to apply the photo stimulation responsiveness materials.…”

Section: Demonstration Of Photo Sol-gel Transformationmentioning

confidence: 99%

“…The photo-gelation of a sol of sodium alginate with calcium carbonate [17,18] was performed by PAmG. In a 9 mL sample pot, 2 wt% sodium alginate (a viscosity range; 80-120 cp) and calcium carbonate (3.0 × 10 -2 mmol) and TPStaurine (6.0 × 10 -2 mmol) was dissolved in 2 mL of distilled water.…”

Section: Gelation Experimentsmentioning

confidence: 99%

Water Soluble Onium Salt Type Photo Amphoteric Compound Generators

Kashiwai

Kaneko

Sawada

et al. 2016

J. Photopol. Sci. Technol.

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We developed novel photo amphoteric compound generators (PAmGs) as a kind of photo-X-generators (PXGs), such as photo-acid generator (PAG). Onium salts that were prepared here generate sulfanilic acid, taurine, or 1-aminoadamantane-3-sulfonic acid in the photochemical reactions. These PAmGs are watersoluble, and photo-decomposable basic compounds to control pH of aqueous solution from basic to acidic side depending on the photon energy absorbed. The PAmG having aminoadamantane structures acted as a better acid-quencher than others did in polymer film. It has the possibility to enhance the contrast of acid concentration related with the resolution of photoresist using PAG. Furthermore, these water-soluble PAmGs induced the photo gelation of alginate by the pH control.

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1-Acetylferroceneoxime-based photoacid generators: application towards sol–gel transformation and development of photoresponsive polymer for controlled wettability and patterned surfaces

Cited by 10 publications

References 38 publications

Light‐Responsive Polymer Membranes

Light‐Responsive Polymer Membranes

D‐π‐a‐type oxime sulfonate photoacid generators for cationic polymerization under UV–visible LED irradiation

Water Soluble Onium Salt Type Photo Amphoteric Compound Generators

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