Researcher Database

SUZUKI Takanori
Faculty of Science Chemistry Organic and Biological Chemistry
Professor

Researcher Profile and Settings

Affiliation

  • Faculty of Science Chemistry Organic and Biological Chemistry

Job Title

    Professor

Degree

  • Doctor of Science, April 1988, Tohoku University, Tohoku University

E-mail

  • tak@sci.hokudai.ac.jp

URL

Research funding number

  • 70202132

ORCID ID

  • 0000-0002-1230-2044

Research Interests

  • Structural Organic Chemistry   Organic Reaction Chemistry   Organic Materials Chemistry   

Research Areas

  • Basic chemistry / Organic chemistry
  • Applied chemistry / Functional solid state chemistry
  • Applied chemistry / Synthetic chemistry
  • Chemistry / Organic chemistry
  • Materials chemistry / Functional materials/Devices

Education

  •        - 1988  Tohoku University  Graduate School, Division of Natural Science  japan
  •        - 1986  Tohoku University  Graduate School, Division of Natural Science  japan
  •        - 1984  Tohoku University  Faculty of Science  japan

Research Activities

Published Papers

Research Grants & Projects

  • Ministry of Education, Culture, Sports, Science and Technology:Grants-in-Aid for Scientific Research(新学術領域研究(研究領域提案型))
    Date (from‐to) : 2009 -2013 
    Author : TAKANORI SUZUKI
     
    北海道大学Electrochromism is a representative function of organic redox systems, by which electrochemical input is reversibly transduced into UV-Vis spectral output. Based on our previous studies on "dynamic redox (dyrex)" systems that undergo reversible C-C bond-formation/-cleavage upon electron transfer, we envisaged that the assembled multiple functions would be endowed under the novel molecular design, and such materials could be prepared exclusively only by using newly developed synthetic methods based on integrated reactions. This work can be divided into two parts: [1] studies on NOVEL MATERIALS exhibiting dynamic redox behavior prepared by integrated reactions; and [2] characterization and exploration of organic redox systems newly prepared by NOVEL INTEGRATED REACTIONS. Most of the research results have been published.
  • Ministry of Education, Culture, Sports, Science and Technology:Grants-in-Aid for Scientific Research(基盤研究(B))
    Date (from‐to) : 2009 -2011 
    Author : Takanori SUZUKI
     
    北海道大学Based on our own results for hexaphenylethane derivative studied so far, it has been proposed that the compound with a ultralong C-C bond would be generated as a stable entity when the two unpaired electron are forced to stay in a proximity in the corresponding diradical without isomerization into the closed-shell species through resonance/peri-cyclic reactions. Based on the above concept have been designed a series of tetraarylpyracenes where the longest C-C bond ever [1.791(3)Å] was determined experimentally. The expandability of such prestrained bonds was also uncovered.
  • Ministry of Education, Culture, Sports, Science and Technology:Grants-in-Aid for Scientific Research(基盤研究(B))
    Date (from‐to) : 2003 -2005 
    Author : Takanori SUZUKI
     
    北海道大学This project has been planned to develop new design concepts on the novel organic responding molecules based on the integration of redox active molecules. The major themes to be tackled with are as follows : (1) Redox response systems with electrochemical bistability and surface modifying properties ; (2) New synthetic strategy for the fused- polyether structures ; (3) Redox active molecules with phase transition properties triggered by external stimuli.We have succeeded in preparing redox systems to meet the requirement in the first theme, and some of them are further endowed with multi-input and multi-output fuctionalities. The disuflide unit or ethynyl groups were selected that act as surface-binding linkers for Au an Si, respectively. Preparation of SAM and examination toward the realization of unimolecular memory are now under way.The fused-polyether skeleton found in some marine natural products should be a suitable motif for studying the aggregation by weak C-H--O hydrogen bonds. In the second theme, facile and general convergent strategy was developed for a variety of polyether skeleton. Based on the newly developed protocol based on the reaction between an aldehyde and an acylanion equivalent, we could synthesize polyetheral natural product (hemibrevetoxin B) and the large segments of ciguatoxins with 4-5 ether units. X-ray analyses on some of them have revealed that several short C-H--O contacts were observed that connect tape-shaped polyethers tol the stacked or dimeric strucures. Not only natural but also non-natural polyethers are shown worth investigated.Reversible oligomerization of bis(diarylethenyl)arenes-type electron donors upon oxidation is the outstanding achievement in terms of the third theme. Deeply-colored polycation oligomers could be isolated as stable salts that regenerated the starting monomeric donors upon reduction. By attaching long alkyl chains on the aryl groups, some of these materials act as organic gelators, thus giving a new desing concept for the dynamic mesophase, whose properties can be modulated by electrochemical input.
  • Ministry of Education, Culture, Sports, Science and Technology:Grants-in-Aid for Scientific Research(基盤研究(B))
    Date (from‐to) : 2001 -2002 
    Author : Takanori SUZUKI
     
    北海道大学This research project is intended to construct the novel molecular response systems that transduce the electrochemical input into two kinds of spectral outputs, they are UV-Vis and CD spectra. These materials are named as "electrochiroptical response systems", and considered as promising candidates for use as chiral redox memories. Compared with the extensively studied electrochromic materials giving the UV-Vis spectral change as a sole output, there have been only a few successful examples reported so far. Based on our previous results on the multi-stage redox systems endowed with high electrochemical bistability, we have designed several chiral electron donors that can be reversibly transformed into the stable dicationic species. They exhibited drastic changes in UV-Vis as well as CD spectra during the interconversion. The high amplitude in CD signals is one of the central points to be considered in the molecular design, and we have realized it by exciton coupling of two identical chromophores located at the proper positions in these molecules. We are now planning to fix these molecules on the metal surface by making SAM, so that these molecules can be used as molecular devices.
  • Ministry of Education, Culture, Sports, Science and Technology:Grants-in-Aid for Scientific Research(基盤研究(C))
    Date (from‐to) : 1996 -1997 
    Author : Takanori SUZUKI
     
    北海道大学The research project is intended to construct the novel redox-type photochromic systems based on the photoinduced electron transfer reactions of electron-donor-acceptor complexes in the crystalline state. In order to realize such an idea it is essential to develop a new type of redox molecules exhibiting bistability. Thus, the redox pairs were designed so as to undergo reversible C-C bond formation and cleavage upon electron transfer. The research started from examining the interconversion hexaphenylethane derivatives 1 and dicationic bis (triarylmethane) dyes 2. It has been found that they constitute the dynamic and reversible redox pair showing vivid change in color and drastic structural change upon electron transfer. They surely are the promising candidate for the present purpose. Unfortunately, however, attempts to obtain the CT crystal of 1 with a variety of electron donors have been unsuccessful, preventing me from realizing my initial proposal. Next, the biphenyl-type electron acceptors having dicyanovinyl moieties were investigated. 2,2'-Disubstituted derivative was found to undergo C-C bond formation upon two-electron reduction. By combining the further isomerization of the reduction product, the latter system constitute a prototype of the novel electrochromic system with "write protect" option.
  • Ministry of Education, Culture, Sports, Science and Technology:Grants-in-Aid for Scientific Research(一般研究(C))
    Date (from‐to) : 1994 -1995 
    Author : Takanori SUZUKI
     
    東北大学->北海道大学The research project is intended to construct the organic redox systems which exhibit the electrochemical response such as electrochromism. In order to realize such molecular systems a new way of molecular designing was adopted where (1) the charged species would be stabilized by formation of strong chromophores with large pi-conjugation but not by aromatization and (2) drastic structural changes should be occurred during the electron transfer. These conditions are quite different from what had been used to design the multi-stage redox systems for a long time. The "dynamic redox behavior"is the central concept in this work, thus the redox pairs were designed so as to undergo reversible C-C bond formation andcleavage upon electron transfer. Dibenzo-TTF derivatives inserted with a cycloalkane ring as well as their isomersof the tricyclic skeleton were studiedin detail as prototypes. Some molecules studies here were proven to be thereversible dynamic redox systems . In orderr to construct the electrochromic systems other molecules containing triarylmethane dye skeletons were designed. The reversible interconversion between hexaarylethane derivatives and bis (triarylmethane) dications was demonstrated .
  • Molecular Response System Based on Dynamic Redox Properties

Educational Activities

Teaching Experience

  • 総合化学特別研究
    開講年度 : 2017
    課程区分 : 修士課程
    開講学部 : 総合化学院
  • Advanced Chemistry
    開講年度 : 2017
    課程区分 : 修士課程
    開講学部 : 総合化学院
    キーワード : Redox Systems, Fuel cell, Laser trapping/microspectroscopy, Catalyst Design, Heterogeneous catalysis, Genome editing
  • 総合化学実験指導法
    開講年度 : 2017
    課程区分 : 修士課程
    開講学部 : 総合化学院
  • Inter-Graduate School Classes(General Subject):Natural and Applied Sciences
    開講年度 : 2017
    課程区分 : 修士課程
    開講学部 : 大学院共通科目
    キーワード : Redox Systems, Fuel cell, Laser trapping/microspectroscopy, Catalyst Design, Heterogeneous catalysis, Genome editing
  • 総合化学実験研究法
    開講年度 : 2017
    課程区分 : 修士課程
    開講学部 : 総合化学院
  • Molecular Chemistry (Structural and Physical Organic Chemistry)
    開講年度 : 2017
    課程区分 : 修士課程
    開講学部 : 総合化学院
    キーワード : 化学 有機化学 構造有機化学 結晶性物質 多形 非平衡 相転移 分子間相互作用 X線構造解析 長い結合
  • 総合化学特別研究第一
    開講年度 : 2017
    課程区分 : 博士後期課程
    開講学部 : 総合化学院
  • Advanced Chemistry
    開講年度 : 2017
    課程区分 : 修士課程
    開講学部 : 総合化学院
    キーワード : Photo functional material, Photocatalyst, Crystal chemistry, Electronic structure, Band engineering
  • 総合化学研究・指導法
    開講年度 : 2017
    課程区分 : 博士後期課程
    開講学部 : 総合化学院
  • Inter-Graduate School Classes(General Subject):Natural and Applied Sciences
    開講年度 : 2017
    課程区分 : 修士課程
    開講学部 : 大学院共通科目
    キーワード : Photo functional material, Photocatalyst, Crystal chemistry, Electronic structure, Band engineering
  • 科学・技術の世界
    開講年度 : 2017
    課程区分 : 学士課程
    開講学部 : 全学
  • Modern Trends in Chemical Sciences and Engineering II
    開講年度 : 2017
    課程区分 : 博士後期課程
    開講学部 : 総合化学院
    キーワード : Redox Systems, Fuel cell, Laser trapping/microspectroscopy, Catalyst Design, Heterogeneous catalysis, Genome editing
  • Modern Trends in Chemical Sciences and Engineering II
    開講年度 : 2017
    課程区分 : 博士後期課程
    開講学部 : 総合化学院
    キーワード : Photo functional material, Photocatalyst, Crystal chemistry, Electronic structure, Band engineering
  • Freshman Seminar
    開講年度 : 2017
    課程区分 : 学士課程
    開講学部 : 全学教育
    キーワード : 化学、有機化学、天然物化学、有機金属化学、機能性有機化学、レポートの書き方、プレゼンテーションの準備方法、効果的なプレゼンテーションとは
  • Research Work in Chemistry
    開講年度 : 2017
    課程区分 : 学士課程
    開講学部 : 理学部
    キーワード : 卒業研究実験
  • Literature Survey in Chemistry
    開講年度 : 2017
    課程区分 : 学士課程
    開講学部 : 理学部
    キーワード : 外国語文献講読
  • The World of Science and Technology
    開講年度 : 2017
    課程区分 : 学士課程
    開講学部 : 全学教育
    キーワード : ノーベル化学賞,クロスカップリング,不斉合成,炭素炭素結合,メスバウア効果,遺伝子工学,生命科学,ホスト―ゲスト,有機合成,巨大分子,表面・界面化学,核磁気共鳴,表面・界面化学,分子軌道理論,化学緩和法
  • The World of Science and Technology
    開講年度 : 2017
    課程区分 : 学士課程
    開講学部 : 全学教育
    キーワード : ナノテク、機能性材料、バイオテクノロジー、生命、環境、遺伝子、医薬、触媒、エネルギー
  • Fundamental Organic Chemistry
    開講年度 : 2017
    課程区分 : 学士課程
    開講学部 : 理学部
    キーワード : <<理学部選択必修科目>> (大項目)有機化学 (小項目)物理有機化学、構造有機化学、反応有機化学、有機電子論、反応機構、立体化学


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