First Cellulose Langmuir‐Blodgett Films towards Photocurrent Generation Systems
First Cellulose Langmuir‐Blodgett Films towards Photocurrent Generation Systems
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DOI：
10.1002/marc.200700130
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发表时间：
2007-06
影响因子：
4.6
通讯作者：
Keita Sakakibara;Y. Ogawa;F. Nakatsubo
中科院分区：
文献类型：
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作者：
Keita Sakakibara;Y. Ogawa;F. Nakatsubo
为了构建基于纤维素的分子光电流产生系统，制备了一种含有卟啉的纤维素衍生物的Langmuir-Blodgett膜。在ITO电极上沉积的LB单分子膜在可见光照射下观察到了阳极光电流，其量子产率分别为1.6%和3.8-4.6%。这些值表明，光激发的卟啉在纤维素LB膜中的自猝灭被抑制，而在LB膜中的卟啉部分具有密集的堆积结构。这是因为卟啉沿纤维主干的距离约为1.0 nm。
Langmuir-Blodgett films of a cellulose derivative containing porphyrins, porphyrin-cellulose, were fabricated in order to construct a cellulose-based molecular photocurrent generation system. On visible light illumination of the LB monolayer film deposited on an ITO electrode, anodic photocurrents were observed with a quantum yield of 1.6% at an applied potential of 0 V versus SCE, and 3.8-4.6% at 0.2-0.3 V versus SCE. These values indicate that the self-quenching of the photoexcited porphyrins in the cellulose LB film was suppressed, while porphyrin moieties in the LB film had a densely packed structure. This is because the porphyrins are located at a distance of approximately 1.0 nm along the cellulose backbone.