Tunable Donor–Acceptor Linear Conjugated Polymers Involving Cyanostyrylthiophene Linkages for Visible-Light-Driven Hydrogen Production

Ye, Dong‐Nai; Liu, Lei; Zhang, Yujie; Qiu, Jia-Bin; Tan, Zhi-Rong; Xing, Yu-Qin; Liu, Shiyong

doi:10.3390/molecules28052203

Cited by 6 publications

(7 citation statements)

References 43 publications

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“…In addition, the presence of vinyl bonds in the main aromatic polymeric chain can increase the degree of coplanarity of the main polymer chain, as vinyl bonds can reduce spatial hindrance on continuous aromatic rings. Our studies have revealed that 2-styrylthiophene-based linear conjugated polymers (CPs) with a -CN substituent have impressive PHP performance [31,32]. The dibromocyanostilbene containing electron-withdrawing cyano groups in the ethylene position, as diarylethene derivatives with D-A architecture, is expected to serve as an excellent skeleton for D-A CP-based efficient photocatalysts in PHP reactions.…”

Section: Introductionmentioning

confidence: 99%

Effect of Controlling Thiophene Rings on D-A Polymer Photocatalysts Accessed via Direct Arylation for Hydrogen Production

Liu

Peng

et al. 2023

Molecules

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Conjugated polymer photocatalysts for hydrogen production have the advantages of an adjustable structure, strong response in the visible light region, adjustable energy levels, and easy functionalization. Using an atom- and step-economic direct C–H arylation method, dibromocyanostilbene was polymerized with thiophene, dithiophene, terthiophene, and fused thienothiophene and dithienothiophene, respectively, to produce donor–acceptor (D-A)-type linear conjugated polymers containing different thiophene derivatives with different conjugation lengths. Among them, the D-A polymer photocatalyst constructed from dithienothiophene could significantly broaden the spectral response, with a hydrogen evolution rate up to 12.15 mmol h−1 g−1. The results showed that the increase in the number of fused rings on thiophene building blocks was beneficial to the photocatalytic hydrogen production of cyanostyrylphene-based linear polymers. For the unfused dithiophene and terthiophene, the increase in the number of thiophene rings enabled more rotation freedom between the thiophene rings and reduced the intrinsic charge mobility, resulting in lower hydrogen production performance accordingly. This study provides a suitable process for the design of electron donors for D-A polymer photocatalysts.

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Section: Introductionmentioning

confidence: 99%

Effect of Controlling Thiophene Rings on D-A Polymer Photocatalysts Accessed via Direct Arylation for Hydrogen Production

Liu

Peng

et al. 2023

Molecules

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“…Consistent with the PL and TPR results, the EIS experiments demonstrate that the order of the Nyquist circle radius is TSO 2 @TiO 2 < TS@TiO 2 < TFl@TiO 2 . Therefore, the smallest arc radius of the Nyquist plot for TSO 2 @TiO 2 means it has lower interfacial resistance and excellent charge mobility characters [ 60 , 61 , 62 ].…”

Section: Resultsmentioning

confidence: 99%

Functionalized Linear Conjugated Polymer/TiO2 Heterojunctions for Significantly Enhancing Photocatalytic H2 Evolution

Gong,

Xing,

et al. 2024

Molecules

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Conjugated polymers (CPs) have attracted much attention in recent years due to their structural abundance and tunable energy bands. Compared with CP-based materials, the inorganic semiconductor TiO2 has the advantages of low cost, non-toxicity and high photocatalytic hydrogen production (PHP) performance. However, studies on polymeric-inorganic heterojunctions, composed of D-A type CPs and TiO2, for boosting the PHP efficiency are still rare. Herein, an elucidation that the photocatalytic hydrogen evolution activity can actually be improved by forming polymeric-inorganic heterojunctions TFl@TiO2, TS@TiO2 and TSO2@TiO2, facilely synthesized through efficient in situ direct C–H arylation polymerization, is given. The compatible energy levels between virgin TiO2 and polymeric semiconductors enable the resulting functionalized CP@TiO2 heterojunctions to exhibit a considerable photocatalytic hydrogen evolution rate (HER). Especially, the HER of TSO2@TiO2 heterojunction reaches up to 11,220 μmol g−1 h−1, approximately 5.47 and 1260 times higher than that of pristine TSO2 and TiO2 photocatalysts. The intrinsic merits of a donor-acceptor conjugated polymer and the interfacial interaction between CP and TiO2 account for the excellent PHP activity, facilitating the separation of photo-generated excitons. Considering the outstanding PHP behavior, our work discloses that the coupling of inorganic semiconductors and suitable D-A conjugated CPs would play significant roles in the photocatalysis community.

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“…This enhanced planarity potentially facilitates faster electron and hole transfer, thereby enhancing charge transfer efficiency. [56][57][58][59] To assess the extent of particle aggregation in the hydrogen evolution solution, we employed uorescence microscopy (FM) to analyse particle sizes. FM offers the advantage of exciting polymers with various wavelengths of light sources and capturing images of aggregates in their native state.…”

Section: Discussion Of Hydrogen Evolutionmentioning

confidence: 99%

Indanone-based conjugated polymers enabling ultrafast electron transfer for visible light-driven hydrogen evolution from water

Huang,

Zhuang,

Chang

et al. 2024

J. Mater. Chem. A

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Tunable Donor–Acceptor Linear Conjugated Polymers Involving Cyanostyrylthiophene Linkages for Visible-Light-Driven Hydrogen Production

Cited by 6 publications

References 43 publications

Effect of Controlling Thiophene Rings on D-A Polymer Photocatalysts Accessed via Direct Arylation for Hydrogen Production

Effect of Controlling Thiophene Rings on D-A Polymer Photocatalysts Accessed via Direct Arylation for Hydrogen Production

Functionalized Linear Conjugated Polymer/TiO2 Heterojunctions for Significantly Enhancing Photocatalytic H2 Evolution

Indanone-based conjugated polymers enabling ultrafast electron transfer for visible light-driven hydrogen evolution from water

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