Functional phenylethynylene side arm poly(arylene ethynylene) conjugated polymers: optical and electrochemical behavior for enrichment of electronic applications†,New Journal of Chemistry

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Functional phenylethynylene side arm poly(arylene ethynylene) conjugated polymers: optical and electrochemical behavior for enrichment of electronic applications†
New Journal of Chemistry ( IF 2.7 ) Pub Date : 2018-03-01 00:00:00 , DOI: 10.1039/c7nj04292b
G. Arun Kumar _{1,

2,

3,

4,

5} , P. Gomathi Priya _{1,

2,

3,

4,

5} , M. Alagar _{1,

2,

3,

4,

5}

Affiliation

The poly(arylene ethynylene) (PAE) conjugated polymers (CPs) with a donor–acceptor (D–A) side arm have been designed and synthesized using Sonogashira cross coupling in the presence of cyano methylene, or cyano thiophene gave diethynyl (A) and alkoxy and alkyl substituted diiodo aryl monomers (D). An interesting electronic response in optical measurements such as UV-visible (UV-vis) and fluorescence (FL) spectra was observed in tetrahydrofuran solvent. From the FL spectra, it was observed that the CP solutions possess an interesting long bathochromic shift when compared with the UV-vis spectra, because of the electron withdrawing, electron releasing and conjugation effects. The electrochemical and thin film UV-vis spectral measurements provided highest occupied molecular orbital-lowest unoccupied molecular orbital (HOMO–LUMO) electronic energy levels and their corresponding semiconducting electronic energy gaps (E_g) of the PAE CPs. Among the side arm CPs, polymers P₁ and P₅ have low E_g of 2.14 eV and 2.17 eV. The new PAE CPs are reliable for use in electronic and photonics applications.

中文翻译：

功能性苯乙炔基侧臂聚（亚芳基乙炔基）共轭聚合物：光学和电化学行为，可丰富电子应用†

具有氰基亚甲基或氰基噻吩存在下的Sonogashira交叉偶合设计并合成了带有供体-受体（DA）侧臂的聚（亚芳基乙炔）（PAE）共轭聚合物（CPs），得到二乙炔基（A）烷氧基和烷基取代的二碘代芳基单体（D）。在四氢呋喃溶剂中观察到了光学测量中有趣的电子响应，例如UV-可见（UV-vis）和荧光（FL）光谱。从FL光谱中，观察到CP溶液与UV-vis光谱相比具有有趣的长红移，这是因为电子吸收，电子释放和共轭作用。Ë_克的PAE CP的）。在侧臂CP中，聚合物P ₁和P ₅具有2.14eV和2.17eV的低E _g。新型PAE CP可靠地用于电子和光子学应用。

更新日期：2018-03-01

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