학술논문
Controlling Ionic Conductivity in Organometallic Ionic Liquids through Light-Induced Coordination Polymer Formation and Thermal Reversion.
Document Type
Academic Journal
Author
Mochida T; Department of Chemistry, Graduate School of Science, Kobe University, Rokkodai, Nada, Kobe, Hyogo 657-8501, Japan.; Research Center for Membrane and Film Technology, Kobe University, Rokkodai, Nada, Kobe, Hyogo 657-8501, Japan.; Shimada M; Department of Chemistry, Graduate School of Science, Kobe University, Rokkodai, Nada, Kobe, Hyogo 657-8501, Japan.; Inoue R; Department of Chemistry, Graduate School of Science, Kobe University, Rokkodai, Nada, Kobe, Hyogo 657-8501, Japan.; Sumitani R; Department of Chemistry, Graduate School of Science, Kobe University, Rokkodai, Nada, Kobe, Hyogo 657-8501, Japan.; Funasako Y; Department of Applied Chemistry and Biochemistry, National Institute of Technology, Wakayama College, 77 Noshima, Nada, Gobo, Wakayama 644-0023, Japan.; Yamada H; Japan Synchrotron Radiation Research Institute (JASRI), Kouto 1-1-1, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan.
Source
Publisher: American Chemical Society Country of Publication: United States NLM ID: 101157530 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1520-5207 (Electronic) Linking ISSN: 15205207 NLM ISO Abbreviation: J Phys Chem B Subsets: MEDLINE
Subject
Language
English
Abstract
Owing to their high ionic conductivity and negligible vapor pressure, ionic liquids (ILs) find applications in various electronic devices. However, fabricating IL-based photocontrollable devices remains a challenge. In this study, we developed organometallic ILs with reversible light- and heat-controlled ionic conductivities for potential use in tunable devices. The physical properties and stimulus responses of ILs containing a cationic sandwich Ru complex with two coordinating substituents were investigated. UV photoirradiation of these ILs triggered cation photodissociation, resulting in their transformation into viscoelastic coordination polymers wherein the coordinating substituents bridged the Ru centers. Owing to the anion coordination, salts with coordinating anions such as CF 3 SO 2 NCN - , B(CN) 4 - , and BF 2 (CN) 2 - exhibited faster response and higher conversion than those with noncoordinating anions including (FSO 2 ) 2 N - and (CF 3 SO 2 ) 2 N - . All photoproducts reverted to their original ILs upon heating, except for the photoproduct of the BF 2 (CN) 2 salt, which decomposed upon heating. Light- and heat-induced reversible changes occur in most cases between the high-ionic-conductive IL state and low-ionic-conductive coordination polymer state. Unlike previously reported ILs with three or one cation substituent, the current ILs exhibited both high reactivity and large ionic conductivity changes.