Development of sulfur-containing functional materials: pi-extended TTF and NIR electrochromism

2016 Fiscal Year Final Research Report

• Project/Area Number: 26620167
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Organic and hybrid materials
• Research Institution: Nara Institute of Science and Technology
• Principal Investigator: YAMADA Hiroko 奈良先端科学技術大学院大学, 物質創成科学研究科, 教授 (20372724)
• Co-Investigator(Renkei-kenkyūsha): ARATANI Naoki 奈良先端科学技術大学院大学, 物質創成科学研究科, 准教授 (60372562) ; KUZUHARA Daiki 岩手大学, 理工学部物理・材料理工学科, 助教 (00583717)
• Research Collaborator: Briseno Alejandro Lopez University of Massachusetts, Associate Professor
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 機能材料 / 有機電子材料 / エレクトロクロミズム / テトラチアフルバレン / 芳香族化合物

Outline of Final Research Achievements

To develop new organic electronic materials, tetracene-fused TTF (DT-TTF) and naphthalene-fuzed TTF bisimide (DNTTF-Im) derivatives were prepared. The difference in the crystal packing structures of tetraphenyl-substituted DT-TTF, showing polymorphism, results in a variety of intermolecular electronic coupling pattern. Butyl and hexyl-substituted DNTTF-Im showed the hole mobility of 10-1 cm2 V-1 s-1 as bottom-gate-top-contact organic field effect transistors. The electronic properties and optical properties were also investigated by UV-vis absorption spectra, ESR, X-ray crystallographic analysis, and DFT calculations. To investigate the electrochromic property, ditianonacene was also prepared. two electron oxidation of ditianonacene gave tetracene radical cation dimer, while tianthrene gave anthracene-like electronic structure by two-electron oxidation.

Free Research Field

有機機能材料