Biopolymer Films of Metal-Coordinated Chlorophyll-a Derivatives for “Green” Supercapacitor Electrodes
Biopolymer Films of Metal-Coordinated Chlorophyll-a Derivatives for “Green” Supercapacitor Electrodes
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DOI：
10.1021/acsaem.2c02154
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发表时间：
2022-09
影响因子：
6.4
通讯作者：
Chao Zhang;Hangchen Ren;Ziyan Liu;S. Sasaki;Xiaofeng Wang
中科院分区：
文献类型：
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作者：
Chao Zhang;Hangchen Ren;Ziyan Liu;S. Sasaki;Xiaofeng Wang
叶绿素 (Chls) 是地球上最丰富的天然有机染料颜料。然而，目前对于叶绿素聚合物的研究还很少。在本文中，我们展示了通过二氢卟酚大环上 C3 位外围乙烯基的电化学偶联，制备了一系列具有不同中心金属（PolyMChls，M= Mg、Co、Ni、Cu、Zn 和 Ga）的聚合叶绿素衍生物。紫外-可见吸收光谱中Soret带的展宽和轻微红移证实了PolyMChl的形成。通过扫描电子显微镜观察，PolyMChl薄膜产生了均匀堆叠的纳米球形态(PolyCuChl∼237 nm)，而原始MChl颗粒是不规则的，尺寸约为10 μm。当这些PolyMChl薄膜用作三电极系统中的工作电极时，PolyCuChl在5 mV s-1下获得了334 F g-1的最高电容。基于广泛存在的叶绿素衍生物，我们发现了一个新的生物聚合物家族。生物聚合物PolyMChlis在储能领域也展现出巨大的潜力。
Chlorophylls (Chls) are the most naturally abundant organic dye pigments on earth. However, there is little research on Chl polymers so far. In this paper, we demonstrate the fabrication of a series of polymerized chlorophyll-aderivatives with different central metals (PolyMChls,M= Mg, Co, Ni, Cu, Zn, and Ga) via the electrochemical coupling of a peripheral vinyl group at the C3-position on the chlorin macrocycle. The formation ofPolyMChlsis confirmed by the broadening and slight red-shift of the Soret band in their ultraviolet–visible absorption spectra.PolyMChlfilms yield a morphology of uniform stacked nanospheres (PolyCuChl∼ 237 nm), while the originalMChlparticles are irregular with a size of about 10 μm by scanning electron microscopy. When thesePolyMChlfilms are employed as the working electrodes in a three-electrode system, the highest capacitance of 334 F g–1at 5 mV s–1is obtained forPolyCuChl. Basing on the widely existing Chl derivatives, we find a new biopolymer family. The great potential of biopolymerPolyMChlis also exhibited in the energy storage area.