Photofunctional Organic Chemistry Laboratory
|Staff & Contact|
|Educational Staff||Prof. Hiroko Yamada
Associate Prof. Naoki Aratani
Assistant Prof. Daiki Kuzuhara, Mitsuharu Suzuki ,Hironobu Hayashi
Education and Research Activities in the Laboratory
The Photofunctional Organic Chemistry Laboratory was established on January 1, 2011.
We focus on the development of functional organic materials including organic semiconductors for photovoltaic cells and organic thin-film transistors, highly fluorescent dyes, etc. on the basis of organic synthesis. In particular, acenes and porphyrinoids are our current target compounds. Students at our laboratory are encouraged to work independently and freely on their own original research themes.
1. Synthesis of new functional acenes
Acenes typified by pentacene are known as excellent organic semiconductors. To make organic conducting materials that can be produced through solution processes, we have developed the thermally and optically responsive precursor methods. (Fig. 1)
2. Development of organic thin-film solar cells
We have been conducting joint research (CREST Program) with four groups specializing in supramolecules, organic electronic devices, and molecular spectroscopy to develop solution-processed low molecule-based thin-film solar cells. (Fig. 2)
3. Synthesis of new porphyrinoids
Porphyrins are cyclic tetrapyrroles contained in photosynthetic reaction centers or hemes, and are widely used as in-vivo or functional materials. We have been synthesizing new porphyrinoids and studying their structures, electronic characteristics, catalytic properties, etc. (Fig. 3)
4. Creation of unique carbon frameworks with remarkable optical/electronic properties
We have created various novel functional polycyclic aromatic hydrocarbons (PAHs). These compounds have near-infrared absorption properties, intensive light emission, or remarkable redox properties. (Fig. 4) We have also been attempting to make porous crystalline materials and graphene nanoribbons based on the novel PAHs.
Explanatory Pictures of Research Activities
- Fig. 1. Optically and thermally switchable fluorophore
- Fig. 2. Photoprecursor method for solution-processing of organic thin-film devices
- Fig. 3. Organic photovoltaic cell with a fullerene-linked tetrabenzoporphyrin
- Fig. 4. Novel functional PAH
Recent Research Papers and Achievements
1. M. Suzuki, Y. Yamaguchi, K. Takahashi, K. Takahira, T. Koganezawa, S. Masuo, K.-i. Nakayama, H. Yamada, Photoprecursor Approach Enables Preparation of Well-Performing Bulk-Heterojunction Layers Comprising a Highly Aggregating Molecular Semiconductor, ACS Appl. Mater. Interfaces, 2016, 8, 8644.
2. A. Matsumoto, M. Suzuki, D. Kuzuhara, H. Hayashi, N. Aratani, H. Yamada, Tetrabenzoperipentacene: Stable Five-Electron Donating Ability and a Discrete Triple-Layered -Graphite Form in the Solid State, Angew. Chem. Int. Ed., 2015, 54, 8175.
3. T. Aotake, M. Suzuki, K. Tahara, D. Kuzuhara, N. Aratani, N. Tamai, H. Yamada, An Optically and Thermally Switchable Electronic Structure Based on an Anthracene–BODIPY Conjugate, Chem. Eur. J., 2015, 21, 4966.
4. Y. Yamaguchi, M. Suzuki, T. Motoyama, S. Sugii, C. Katagiri, K. Takahira, S. Ikeda, H. Yamada, K.-i. Nakayama, Photoprecursor approach as an effective means for preparing multilayer organic semiconducting thin films by solution processes, Sci. Rep., 2014, 4, 7151.