Study on initial processes of crystal nucleolus formation as probed by fluorescence spectral change due to the organic molecular assemblies

• Project/Area Number: 21750021
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Physical chemistry
• Research Institution: Shinshu University
• Principal Investigator: ITO Fuyuki Shinshu University, 教育学部, 准教授 (80403921)
• Project Period (FY): 2009 – 2010
• Project Status: Completed (Fiscal Year 2010)
• Budget Amount: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000); Fiscal Year 2010: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2009: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
• Keywords: 有機分子集合体 / 蛍光スペクトル / 結晶核生成 / 高分子薄膜 / 有機結晶 / ペリレン誘導体 / ピレン誘導体

Research Abstract

We have studied on intial processes of crystal nucleolus formation as probed by fluorescence spectral change due to the organic molecular assemblies. Trimethyl-(2-oxo-2-pyrene-1-yl-ethyl)-ammonium bromide (PyAm) was used as a fluorescent dye molecule. The size of PyAm aggregates in the PVA thin films were increased with increasing dye concentration. The fluorescence spectra of PyAm in the PVA film at a lower concentration of 0.001mol% only showed the monomer emission. The fluorescence peak shifted to the red with increasing dye concentration, which was assigned to a dimer or excimer-like emission. Changes in the fluorescence spectra relate to the formation of aggregates in the films. The nano-crystals and/or aggregates formed by phase separation are presumed to show hierarchical change (like a consecutive reaction) of fluorescence property depending on the domain size. We also find the fluorescence spectral change of PyAm nano-aggregates by the photo irradiation. It is originated from the photoinduced dissolution of PyAm aggregates.

Research Products

• [Journal Article] Polarization dependence for enhancement of near infra-red fluorescence intensity by local surface plasmon resonance from arranged gold nanoblocks (2011)
  • Author(s): Fuyuki Ito, Ryuichi Ohta, Yukie Yokota, Kosei Ueno, Hiroaki Misawa, Toshihiko Nagamura
  • Journal Title: Mol.Cryst.Liq.Cryst. 538 Pages: 265-271
  • Peer Reviewed
• [Journal Article] Fluorescence properties of aromatic amine adsorbed on metallic and semiconducting single-walled carbon nanotubes (2011)
  • Author(s): Satoshi Kubota, Takafumi Maruyama, Hiromasa Nishikiori, Fuyuki Ito, Nobuaki Tanaka, Morinobu Endo, Tsuneo Fujii
  • Journal Title: J.Photochem.Photobiol.A. 218 Pages: 226-230
  • NAID: 120007113733
  • Peer Reviewed
• [Journal Article] Near-Infrared Fluorescence Enhancement by Regularly Arranged Gold Nanoblocks (2010)
  • Author(s): Fuyuki Ito, Ryuichi Ohta, Yukie Yokota, Kosei Ueno, Hiroaki Misawa, Toshihiko Nagamura
  • Journal Title: Chem.Lett. 39\11 Pages: 1218-1219
  • NAID: 10027315870
  • Peer Reviewed
• [Journal Article] Synthesis and Electrochromic Properties of a Highly Water-soluble Hyperbranched Polymer Viologen (2010)
  • Author(s): Takeshi Sakano, Fuyuki Ito, Tomonori Ono, Osamu Hirata, Masaaki Ozawa, Toshihiko Nagamura
  • Journal Title: Thin Solid Films 519 Pages: 1458-1463
  • Peer Reviewed
• [Journal Article] Fluorescence Properties of Pyrene Derivative Aggregates Formed in Polymer Matrix Depending on Concentration (2010)
  • Author(s): Fuyuki Ito, Toshifumi Kakiuchi, Takeshi Sakano, Toshihiko Nagamura
  • Journal Title: Phys.Chem.Chem.Phys. 12 (36) Pages: 10923-10927
  • NAID: 120007112049
  • Peer Reviewed
• [Journal Article] Fluorescence Properties of Ion Pair Charge Transfer Complex with Bithiophene Group (2010)
  • Author(s): Fuyuki Ito, Takayasu Nagai, Yasuhiro Sota, Toshihiko Nagamura
  • Journal Title: J.Photochem.Photobiol.A. 212 Pages: 142-146
  • Peer Reviewed
• [Journal Article] Synthesis and Electrochromic Properties of a Highly Water-soluble Hyperbranched Polymer Viologen (2010)
  • Author(s): T.Sakano, F.Ito, T.Ono, O.Hirata, M.Ozawa, T.Nagamura
  • Journal Title: Thin Solid Films Volume: 5 Pages: 1458-1463
  • Peer Reviewed
• [Journal Article] Fluorescence Properties of Pyrene Derivative Aggregates Formed in Polymer Matrix Depending on Concentration (2010)
  • Author(s): F.Ito, T.Kakiuchi, T.Sakano, T.Nagamura
  • Journal Title: Physical Chemistry Chemical Physics Volume: 12 Pages: 10923-10927
  • NAID: 120007112049
  • Peer Reviewed
• [Journal Article] Near-infrared fluorescence enhancement by regularly arranged gold nanoblocks (2010)
  • Author(s): F.Ito, R.Ohta, Y.Yokota, K.Ueno, H.Misawa, T.Nagamura
  • Journal Title: Chemistry Letters Volume: 39 Pages: 1218-1219
  • NAID: 10027315870
  • Peer Reviewed
• [Journal Article] Fluorescence properties of aromatic amine adsorbed on metallic and semiconducting single-walled carbon nanotubes (2010)
  • Author(s): S.Kubota, T Maruyama, H.Nishikiori, F.Ito, N.Tanaka, M.Endo, T.Fujii
  • Journal Title: Journal of Photochemistry and Photobiology A Volume: 218 Pages: 226-230
  • NAID: 120007113733
  • Peer Reviewed
• [Journal Article] Polarization dependence for enhancement of near infra-red fluorescence intensity by local surface plasmon resonance from arranged gold nanoblocks (2010)
  • Author(s): F.Ito, R.Ohta, Y.Yokota, K.Ueno, H.Misawa, T.Nagamura
  • Journal Title: Molecular Crystals Liquid Crystals Volume: 538 Pages: 265-271
  • Peer Reviewed
• [Journal Article] Anion Responsive Dyad System of Porphyrin and N-confused Porphyrin (2009)
  • Author(s): Motoki Toganoh, Hironao Miyachi, Hisanori Akimaru, Fuyuki Ito, Toshihiko Nagamura, Hiroyuki Furuta
  • Journal Title: Org.Biomol.Chem. 7 Pages: 3027-3030
  • Peer Reviewed
• [Journal Article] Formation of Specific Charge-transfer Complexes between Hyperbranched Polymer Viologen and Neutral Donors in Solid Films Depending on Donor Fraction (2009)
  • Author(s): Takeshi Sakano, Fuyuki Ito, Osamu Hirata, Masaaki Ozawa, Toshihiko Nagamura
  • Journal Title: Chem.Lett. 38\8 Pages: 858-859
  • NAID: 10025125461
  • Peer Reviewed
• [Journal Article] Excited state Relaxation Process of Free-base and Oxovanadium Naphthalocyanine in Near-infrared Region (2009)
  • Author(s): Fuyuki Ito, Tatsuaki Inoue, Daisuke Tomita, Toshihiko Nagamura
  • Journal Title: J.Phys.Chem.B 113 (16) Pages: 5458-5463
  • Peer Reviewed
• [Journal Article] Excited-State Relaxation Process of Free-Base and Oxovanadium Naphthalocyanine in Near-Infrared Region (2009)
  • Author(s): F.Ito, T.Inoue, D.Tomita, T.Nagamura
  • Journal Title: Journal of Physical Chemistry B 113 Pages: 5458-5463
  • Peer Reviewed
• [Journal Article] Formation of Specific Charge-transfer Complexes between Hyperbranc hed Polymer Viologen and Neutral Donors in Solid Films Depending on Donor Fraction (2009)
  • Author(s): T.Sakano, F.Ito, O.Hirata, M.Ozawa, T.Nagamura
  • Journal Title: Chemistry Letters 38 Pages: 858-859
  • Peer Reviewed
• [Journal Article] Anion responsive dyad system of porphyrin and N-confused porphyrin (2009)
  • Author(s): M.Toganoh, H.Miyachi, H.Akimaru, F.Ito, T.Nagamura, H.Furuta
  • Journal Title: Organic and Biomolecular Chemistry 7 Pages: 3027-3030
  • Peer Reviewed
• [Presentation] 高分子薄膜中でのペリレン誘導体の蛍光変化 (2011)
  • Author(s): 伊藤冬樹・佐々木智子・宇賀地由里
  • Organizer: 日本化学会第91春季年会 日本化学会第91春季年会(2011)講演予稿集
  • Year and Date: 2011-03-11
• [Presentation] 高分子薄膜中でのペリレン誘導体の蛍光変化 (2011)
  • Author(s): 伊藤冬樹・佐々木智子・宇賀地由里
  • Organizer: 日本化学会第91春季年会
  • Place of Presentation: (日本化学会第91春季年会(2011)講演予稿集(東日本大震災により紙上及びWeb上で公開))
  • Year and Date: 2011-03-11
• [Presentation] 時間分解分光法を用いた低温剛体溶媒中でのレーザー誘起固体化初期過程の研究 (2010)
  • Author(s): 伊藤冬樹・石橋千英・伊都将司・宮坂博
  • Organizer: 第4回分子科学討論会
  • Place of Presentation: 大阪大学
  • Year and Date: 2010-10-17
• [Presentation] Near-Infrared Fluorescence Enhancement by Regularly Arranged Gold Nanoblocks (2010)
  • Author(s): R.Ohta, F.Ito, Y.Yokota, K.Ueno, H.Misawa, T.Nagamura
  • Organizer: Korea-Japan Forum 2010 on Organic Materials for Electronics and Photonics (KJF2010)
  • Place of Presentation: Kitakyushu, Japan
  • Year and Date: 2010-08-23
• [Presentation] 高分子薄膜中でのピレン誘導体の集合化にともなう蛍光変化と結晶化挙動 (2010)
  • Author(s): 伊藤冬樹・柿内俊文・長村利彦
  • Organizer: 日本化学会第90春季年会
  • Place of Presentation: 近畿大学
  • Year and Date: 2010-03-27
• [Presentation] 表示素子材料としての光・電子機能性高分子薄膜の開発 (2010)
  • Author(s): 金善南・坂野豪・伊藤冬樹・長村利彦・田中章博・小澤雅昭
  • Organizer: 日本化学会第90春季年会
  • Place of Presentation: 近畿大学
  • Year and Date: 2010-03-26
• [Presentation] ビピリジニウムハイパーブランチポリマーと中性ドナー分子との電荷移動錯体形成 (2009)
  • Author(s): 金善南・坂野豪・伊藤冬樹・長村利彦・田中章博・小澤雅昭
  • Organizer: 第58回高分子討論会
  • Place of Presentation: 熊本大学
  • Year and Date: 2009-09-18
• [Presentation] 高分子薄膜中でのピレン誘導体の集合化にともなう蛍光変化 (2009)
  • Author(s): 伊藤冬樹・柿内俊文・長村利彦
  • Organizer: 2009年光化学討論会
  • Place of Presentation: 群馬大学
  • Year and Date: 2009-09-18
• [Presentation] ビピリジニウム基を有する電子ドープ型半導体材料の合成と物性評価 (2009)
  • Author(s): 小野智則・坂野豪・伊藤冬樹・長村利彦
  • Organizer: 第46回化学関連支部合同九州大会
  • Place of Presentation: 北九州国際会議場
  • Year and Date: 2009-07-11
• [Remarks] ホームページ等
  • URL: http://rika.shinshu-u.ac.jp/ito/fipage/index.html