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β-Pyrrole functionalized push-pull BODIPYs: Synthesis, photophysical, electrochemical, thermal and computational studies
Journal of Porphyrins and Phthalocyanines ( IF 1.5 ) Pub Date : 2023-06-26 , DOI: 10.1142/s1088424623501018
Indresh Singh Yadav 1 , Rajneesh Misra 1
Affiliation  

A series of β-pyrrole functionalized push-pull BODIPYs BDP 1-06 were designed and synthesized via Palladium-catalyzed Suzuki cross-coupling reaction and by increasing the oxidation state of the sulfur atom in the thiazine ring. The effect of various donor entities on the photophysical, electrochemical, thermal, and computational studies of the BODIPY was investigated. The absorption spectra of the push-pull BODIPY BDP 2 show a red shift compared to the rest of the BDPs, due to strong donor-acceptor interaction. The phenothiazine-5,5-dioxide functionalized BODIPY BDP 6 exhibit a blue shift in the UV-vis region compared to the phenothiazine substituted BODIPY BDP 5 due to the weak donor ability of the phenothiazine-5,5-dioxide unit. The electrochemical studies were performed for the push-pull BODIPYs BDP 1–6 to analyze the effect of different donor groups on the redox properties of the BODIPY. The thermogravimetric analysis of the BODIPYs BDP 1–6 shows that BDP 2 exhibits excellent thermal stability compared to BDP1, 3, 4, 5, and 6. The theoretical studies reveal that the phenothiazine-5,5-dioxide substituted BODIPY BDP 6 exhibits a large HOMO–LUMO gap compared to phenothiazine functionalized BODIPY BDP 5 due to the low donor ability of the phenothiazine-5,5-dioxide unit. The theoretical calculations were consistent with the experimental observations.



中文翻译:

β-吡咯功能化推挽 BODIPY:合成、光物理、电化学、热学和计算研究

一系列β通过钯催化的 Suzuki 交叉偶联反应并通过提高噻嗪环中硫原子的氧化态,设计并合成了-吡咯功能化推挽 BODIPY BDP 1-06 。研究了各种供体实体对 BODIPY 的光物理、电化学、热和计算研究的影响。由于强烈的供体-受体相互作用,推拉 BODIPY BDP 2的吸收光谱与其他 BDP 相比显示出红移与吩噻嗪取代的 BODIPY BDP 5相比,吩噻嗪 5,5-二氧化物官能化的 BODIPY BDP 6在紫外-可见光区域表现出蓝移由于吩噻嗪-5,5-二氧化物单元的供体能力较弱。对推挽式 BODIPY BDP 1-6进行电化学研究,分析不同供体基团对 BODIPY 氧化还原性能的影响。BODIPYs BDP 1-6热重分析表明,与BDP 1、3、4、5 和 6 相比BDP 2表现优异热稳定性理论研究表明,与吩噻嗪功能化的 BODIPY BDP 5相比,吩噻嗪-5,5-二氧化物取代的 BODIPY BDP 6表现出较大的 HOMO-LUMO 间隙由于吩噻嗪-5,5-二氧化物单元的供体能力较低。理论计算与实验观察结果一致。

更新日期:2023-06-26
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