Polythiophene-<i>g</i>-poly(methacrylic acid) and perylene diimide appended peptide conjugates with tuneable photoluminescence, OMEIC, and photo-switching properties

Nandi, Arun K.; Hazra, Soumyajit; Ghosh, Radhakanta; Palui, A.; Ghosh, Arnab; Banerjee, Arindam

doi:10.1039/d3tc00079f

Cited by 11 publications

(7 citation statements)

References 68 publications

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“…This can be due to the stronger π−π stacking interactions among the chromophoric π moieties of P 1 inside the hybrid gel matrix than the simply aggregated state of P 1 . 48 In the FEG-TEM image, P 1 has shown the interconnected nanosphere-like structure (Figure S11a). Moreover, we observed the fibril network morphology for the aggregated P 3 in gel state.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Stabilization of a Photoradiated Naphthalene Diimide-Based Organic Radical Anion Inside a Peptide-Based Gel Matrix with an Improvement of Optoelectronic Properties

Hazra,

Gayen,

Ghosh

et al. 2024

Langmuir

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An amino acid-conjugated naphthalene diimide (NDI)-based highly red fluorescent radical anion has been found in a water medium under the photoradiated condition. This molecule has failed to form the radical anion in the monomeric state; however, the J aggregation in the aqueous medium has ensured the formation of radical anion in the ambient condition after the irradiation of both sunlight and UV light exposure. Electron paramagnetic resonance (EPR) studies clearly suggest the formation of radical anions. Herein, the stability of the radical anion in the aqueous medium is only a few minutes as a small amount of shaking is enough to quench the radical anion in the solution state. Furthermore, the incorporation of this molecule into a peptide-based hydrogel matrix and the consequent photoirradiation have not only helped to develop radical anion in the gel matrix but also increased the enormous stability of the radical anion inside the hydrogel matrix even for 30 days. It is envisaged that the formation of the radical anion within the gel matrix prevents the free movement of the NDI molecules and restricts the diffusion of molecular oxygen in the system, which leads to the stability of the radical anions in the gel. Moreover, the stability of the radical anion within the gel has helped to enhance the conductivity of the hybrid gel to a great extent. Interestingly, the radical anion-containing hybrid hydrogel has shown a potential photoswitching property.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Stabilization of a Photoradiated Naphthalene Diimide-Based Organic Radical Anion Inside a Peptide-Based Gel Matrix with an Improvement of Optoelectronic Properties

Hazra,

Gayen,

Ghosh

et al. 2024

Langmuir

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“…By applying the bias voltage from +5 to −5 V, the current conductivity of the dry gel has been measured to be 14.1 μA, which suggests the semiconductive nature of the aggregated material. Interestingly, the I – V curve of the dry gel has shown a diode-like nature (Figure a), and this encouraged us to look into whether the dry gel is associated with the mix ion and electron conductivity …”

Section: Resultsmentioning

confidence: 99%

“…The statistical analysis of the dc conductivity has been carried out with 8 different experiments, which also exhibited good reproducible data (Figure S6). Such a good dc current of the NDIP dry gel is probably due to the presence of the conductive nanofiber of the aggregated NDIP in the gel state . In the temperature-dependent resistance analysis, it is observed that the resistance of the dried gel is also gradually decreasing from 0.14 Ω at 35 °C to 0.123 Ω at 85 °C (Figure S7).…”

Section: Resultsmentioning

confidence: 99%

“…Such a good dc current of the NDIP dry gel is probably due to the presence of the conductive nanofiber of the aggregated NDIP in the gel state. 43 In the temperaturedependent resistance analysis, it is observed that the resistance of the dried gel is also gradually decreasing from 0.14 Ω at 35 °C to 0.123 Ω at 85 °C (Figure S7). The fall of resistance with temperature in the dried gel indicates its semiconducting nature.…”

Section: ■ Materials and Methodsmentioning

confidence: 98%

“…Interestingly, the I−V curve of the dry gel has shown a diode-like nature (Figure 5a), and this encouraged us to look into whether the dry gel is associated with the mix ion and electron conductivity. 43 The mixed conductive nature of the system can be further understood by their I−V curve because of the different types of conductive nature of the electrons and ions. Due to the larger size of the ions, they do not respond to conductivity in the lower voltage bias.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

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Exploration of an Organic Mixed-Ion Electronic Conductor by a Peptide-Appended Naphthalene Diimide-Based Photoresponsive Hydrogel

Hazra,

Gayen

et al. 2023

ACS Appl. Polym. Mater.

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Organic soft material-based mixed-ion electronic conductors (MIECs) have nowadays emerged as an important class of material due to their immense use in many electronic fields. In this study, we report a peptideappended naphthalene diimide-based (NDIP) thermoresponsive, mechanosensitive, and photoresponsive hydrogel in the phosphate buffer medium at the physiological pH (7.46), which also shows MIECs properties in the assembled state. The UV−visible study has revealed the J type of aggregation of this NDIP molecule in the gel state. The aggregation-induced emission is clearly evident from the photoluminescence spectra in the molecularly aggregated state. Aggregation of peptide-based molecules in the gel state leads to the formation of supramolecular polymeric nanofibers that can be caused by the electronic conduction of the dried gel state. Moreover, the Na + ions inside the polymeric fiber network of the gel, which are mainly sourced from the sodium phosphate salt of the buffer, show ionic conductance along with the electronic conductance of the NDIP. The synergistic effect of both conductivities has made the aggregated gel system a perfect agent of organic mixed-ion electronic conducting (OMIEC) material. Moreover, the OMIEC nature of the dried gel has been well understood by several electronic techniques such as current− voltage (I−V), current−time (I−t), and Nyquist plot. The perfect stacking of the π-conjugated core of the naphthalene-based gelator in the gel state has shown good photoresponsive behavior by switching "on" and "off" the white light illumination. A stable photocurrent gain with an I on /I off value of 5.58 has been found in the aggregated dry gel state, indicating a potential photoswitching property of the system.

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Polyaniline-(dinonylnapthyl disulphonic acid) hydrogel showing enhanced supercapacitor and photo-current performance by in situ growth of AgNPs

Basak,

Das,

Maity

et al. 2024

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Polythiophene-g-poly(methacrylic acid) and perylene diimide appended peptide conjugates with tuneable photoluminescence, OMEIC, and photo-switching properties

Abstract: A water soluble polymer conjugate, composed of poly(thiophene methacrylate) (PTMA) and cationic peptide appended Perylene diimide (PBI-NH3+) was fabricated. The dipolar interaction between PTMA and PBI-NH3+helped to uncoil the polythiophene...

Cited by 11 publications

References 68 publications

Stabilization of a Photoradiated Naphthalene Diimide-Based Organic Radical Anion Inside a Peptide-Based Gel Matrix with an Improvement of Optoelectronic Properties

Stabilization of a Photoradiated Naphthalene Diimide-Based Organic Radical Anion Inside a Peptide-Based Gel Matrix with an Improvement of Optoelectronic Properties

Exploration of an Organic Mixed-Ion Electronic Conductor by a Peptide-Appended Naphthalene Diimide-Based Photoresponsive Hydrogel

Polyaniline-(dinonylnapthyl disulphonic acid) hydrogel showing enhanced supercapacitor and photo-current performance by in situ growth of AgNPs

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