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

当前位置： X-MOL 学术 › J. Mater. Chem. C › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Polythiophene-g-poly(methacrylic acid) and perylene diimide appended peptide conjugates with tuneable photoluminescence, OMEIC, and photo-switching properties
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2023-03-13 , DOI: 10.1039/d3tc00079f
Soumyajit Hazra _{1,

2} , Radhakanta Ghosh ₁ , Arnab Palui ₃ , Aswini Ghosh ₃ , Arindam Banerjee ₂ , Arun K. Nandi ₁

Affiliation

A water-soluble polymer–peptide 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 backbone, resulting in an increase of the conjugation length, which was thoroughly studied by UV-Vis, Fourier transform infrared (FTIR), and X-ray diffraction (XRD) spectra. The morphology of PTMA changes from vesicular to a highly entangled fibrillar network in the hybrid as evident from the HR-TEM study. Fluorescence spectroscopic study and time-correlated single-photon counting (TCSPC) studies were made to understand the effect of interaction on the photoluminescence (PL) properties of the hybrid. The current–voltage (I–V) plots of hybrid materials showed synergistic enhancement of current with voltage, showing an interesting organic mixed ionic and electronic conductivity (OMIEC) property, which was further supported through current–time (I–t) and Nyquist plot results. This conjugate material shows an enhancement of photo-switching behaviour with the highest photocurrent gain of 9. 8 (I_on/I_off) for the composite with 27 wt% PBI-NH₃⁺. The increase in photoswitching property is attributed to efficient charge (electron–hole) separation and holds a future promise for fabricating new types of macromolecular OMIEC systems along with excellent photocurrent switching efficiency.

中文翻译：

具有可调光致发光、OMEIC 和光开关特性的聚噻吩-g-聚（甲基丙烯酸）和苝二酰亚胺附加肽结合物

制备了一种由聚（甲基丙烯酸噻吩）(PTMA) 和附加有阳离子肽的苝二酰亚胺 (PBI-NH ₃^{+ ) 组成的水溶性聚合物-肽共轭物。}_{PTMA与PBI-NH 3}⁺的偶极相互作用帮助展开聚噻吩主链，导致共轭长度增加，这已通过紫外-可见、傅里叶变换红外 (FTIR) 和 X 射线衍射 (XRD) 光谱进行了深入研究。从 HR-TEM 研究可以明显看出，PTMA 的形态在混合物中从囊泡变为高度缠结的纤维状网络。进行了荧光光谱研究和时间相关单光子计数 (TCSPC) 研究，以了解相互作用对混合体的光致发光 (PL) 特性的影响。混合材料的电流-电压 (I-V) 图显示电流随电压的协同增强，显示出有趣的有机混合离子和电子电导率 (OMIEC) 特性，电流-时间进一步支持了这一特性(I – t ) 和 Nyquist 图结果。对于具有 27 wt% PBI-NH ₃⁺的复合材料，这种共轭材料显示出光开关行为的增强，最高光电流增益为 9. 8（I _on / I _off ）。光开关特性的增加归因于有效的电荷（电子-空穴）分离，并在未来制造新型大分子 OMIEC 系统以及出色的光电流开关效率方面具有前景。

更新日期：2023-03-13

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南