Synthesis of donor-acceptor-type conjugated polymer dots as organic photocatalysts for dye degradation and hydrogen evolution

Gwon, Yougjin; Jo, Seonyoung; Lee, Hyun Jun; Park, Soo Young; Lee, Taek Seung

doi:10.1016/j.polymer.2021.124004

Cited by 18 publications

(8 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The technology for converting inexhaustible solar energy into renewable and clean hydrogen energy is a widely accepted ideal approach to produce green fuel, where the type of semiconductive photocatalyst materials greatly affects the hydrogen evolution efficiency. − Nowadays, a variety of photocatalyst materials including inorganic photocatalysts − and organic metal-free polymer photocatalysts − have been developed for hydrogen production. Compared to inorganic photocatalysts, organic photocatalysts with conjugated architectures have aroused enormous interests due to their outstanding structure stability, tunable energy levels, and flexible molecular design.…”

Section: Introductionmentioning

confidence: 99%

Rational Design of Conjugated Microporous Polymer Photocatalysts with Definite D−π–A Structures for Ultrahigh Photocatalytic Hydrogen Evolution Activity under Natural Sunlight

et al. 2022

View full text Add to dashboard Cite

Organic polymers with conjugated architectures have been widely exploited as photocatalyst materials for hydrogen generation. However, it is still an enormous challenge to develop photocatalysts with high hydrogen generation activity under natural sunlight, which is pretty significant for practical applications. Herein, two conjugated microporous polymer photocatalysts with definite D−π–A structures are designed and prepared using dibenzo[g,p]chrysene or pyrene with planar conjugated architecture as electron donors, thiophene as a π-spacer, and dibenzo[b,d]thiophene-S,S-dioxide as an electron acceptor. Benefiting from the efficient separation of light-generated electrons/holes due to the definite D−π–A structure and the broad light absorption range, the bare polymer Py-TP-BTDO could deliver a high photocatalytic hydrogen evolution rate (HER) of 115.03 mmol h–1 g–1 upon exposure to visible light (λ > 420 nm). Impressively, the outdoor photocatalytic experiment reveals that abundant and continuous hydrogen bubbles could be produced fast and visually observed under natural sunlight by the Py-TP-BTDO polymer film with a large active area of 120 cm2. A water-drainage experiment further demonstrates that 1224 mL of hydrogen gas could be produced by 25 mg of a polymer photocatalyst with 3 wt % Pt cocatalyst under natural sunlight in 7 h, corresponding to a high HER of 312.24 mmol h–1 g–1, which represents the state of the art of organic photocatalyst materials to date. The high photocatalytic activity under natural sunlight suggests the potential of the developed Py-TP-BTDO polymer photocatalyst in the practical applications for photocatalytic hydrogen production.

show abstract

Section: Introductionmentioning

confidence: 99%

Rational Design of Conjugated Microporous Polymer Photocatalysts with Definite D−π–A Structures for Ultrahigh Photocatalytic Hydrogen Evolution Activity under Natural Sunlight

et al. 2022

View full text Add to dashboard Cite

show abstract

“…PPBTBT containing phenylene and bisthienylbenzothiadiazole groups was synthesized based on the previous report . Monomers of 1 , 2 , and benzene-1,4-diboronic acid were polymerized by the Suzuki coupling reaction in the presence of Pd(0) catalyst to obtain dark red PPBTBT (Scheme ).…”

Section: Resultsmentioning

confidence: 99%

“…1,4-Dibromo-2,5bis(octyloxy)benzene (1) and 4,7-bis(5-bromothiophen-2-yl)benzo-[c][1,2,5]thiadiazole (2) were synthesized according to previous literature. 45 Fourier transform infrared (FT-IR) spectroscopy was performed using a Bruker Tensor 27 spectrometer (Bruker). 1 H and 13 C nuclear magnetic resonance (NMR) spectra were measured using a Bruker Fourier 300 spectrometer (Bruker) and a Bruker Avance III spectrometer (Bruker), respectively.…”

Section: Materials and Instrumentationmentioning

confidence: 99%

Silica-Based Platform Decorated with Conjugated Polymer Dots and Prussian Blue for Improved Photodynamic Cancer Therapy

Jo,

Lee,

Park

et al. 2023

ACS Appl. Mater. Interfaces

Self Cite

View full text Add to dashboard Cite

To advance cancer treatment, we have developed a novel composite material consisting of conjugated polymer dots (CPDs) and Prussian blue (PB) particles, which were immobilized on, and encapsulated within, silica particles, respectively. The CPDs functioned as both a photosensitizer and a photodynamic agent, and the PB acted as a photothermal agent. The silica platform provided a biocompatible matrix that brought the two components into close proximity. Under laser irradiation, the fluorescence from the CPDs in the composite material enabled cell imaging and was subsequently converted to thermal energy by PB. This efficient energy transfer was accomplished because of the spectral overlap between the emission of donor CPDs and the absorbance of acceptor PB. The increase in local temperature in the cells resulted in a significant increase in the amount of reactive oxygen species (ROS) generated by CPDs, in which their independent use did not produce sufficient ROS for cancer cell treatment. To assess the impact of the enhanced ROS generation by the composite material, we conducted experiments using cancer cells under 532 nm laser irradiation. The results showed that with the increase in local temperature, the generated ROS increased by 30% compared with the control, which did not contain PB. When the silica-based composite material was positioned at the periphery of the tumor for 120 h, it led to a much slower tumor growth than other materials tested. By using a CPD-based photodynamic therapy platform, a new simplified approach to designing and preparing cancer treatments could be achieved, which included photothermal PB-assisted enhanced ROS generation using a single laser. This advancement opens up an exciting new opportunity for effective cancer treatment.

show abstract

“…Therefore, various nanomaterials have been introduced into inorganic photocatalysts for ROS generation in the visible region, but this requires additional synthetic steps and might result in a poor interface between two materials. 21–23 To overcome these difficulties related to inorganic photocatalysts, various organic conjugated polymers have been synthesized and tested in dye degradation applications 24–34 due to their many interesting features. These include their environmental friendliness, earth-abundant elemental composition, tunable energy levels and excellent chemical stability against photobleaching.…”

Section: Introductionmentioning

confidence: 99%

“…However, the synthetic procedures for such donor–acceptor conjugated polymers are laborious, expensive and involve multiple steps. 35 For example, Gwen et al 31 Demonstrated the synthesis of four types of conjugated polymers via the cross-coupling of two donor units (phenylene and fluorene) and two acceptor groups (benzothiadiazole and bisthienylbenzothiadiazole) with tuned band gaps, and further used their nanostructures for photocatalytic dye degradation and the hydrogen evolution reaction in an aqueous medium under visible light. Kosco et al 36 synthesized a series of oligoethylene-sidechain-containing donor–acceptor conjugated polymers consisting of different donors (including fluorine, 4,9-dihydro-s-indaceno[1,2- b :5,6- b ′]dithiophene, and benzo[1,2- b :4,5- b ′]dithiophene] and an acceptor (such as benzothiadiazole) with tailored band gaps and employed their nanoparticles for the hydrogen evolution reaction under visible light.…”

Section: Introductionmentioning

confidence: 99%

Donor–acceptor organic nanostructure based on conjugated polymer for improving visible-light-driven photocatalytic activity towards degradation of dye in aqueous medium

et al. 2022

View full text Add to dashboard Cite

show abstract

Synthesis of donor-acceptor-type conjugated polymer dots as organic photocatalysts for dye degradation and hydrogen evolution

Cited by 18 publications

References 47 publications

Rational Design of Conjugated Microporous Polymer Photocatalysts with Definite D−π–A Structures for Ultrahigh Photocatalytic Hydrogen Evolution Activity under Natural Sunlight

Rational Design of Conjugated Microporous Polymer Photocatalysts with Definite D−π–A Structures for Ultrahigh Photocatalytic Hydrogen Evolution Activity under Natural Sunlight

Silica-Based Platform Decorated with Conjugated Polymer Dots and Prussian Blue for Improved Photodynamic Cancer Therapy

Donor–acceptor organic nanostructure based on conjugated polymer for improving visible-light-driven photocatalytic activity towards degradation of dye in aqueous medium

Contact Info

Product

Resources

About