Optical Properties of Chiral Azo-Schiff Base Mn(II) and Zn(II) Complexes with Silver Nanoparticles  

作　　者：Kazuya Saiga Tomoyuki Haraguchi Yasutaka Kitahama Takuya Hosokai Hiroyuki Matsuzaki Dohyun Moon Mutsumi Sugiyama Michikazu Hara Takashiro Akitsu Kazuya Saiga;Tomoyuki Haraguchi;Yasutaka Kitahama;Takuya Hosokai;Hiroyuki Matsuzaki;Dohyun Moon;Mutsumi Sugiyama;Michikazu Hara;Takashiro Akitsu(Department of Chemistry, Faculty of Science, Tokyo University of Science, Tokyo, Japan;National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan;Pohang Accelerator Laboratory, Pohang, Korea;Department of Electrical Engineering, Faculty of Science and Technology, Tokyo University of Science, Noda, Japan;Materials and Structures Laboratory, Tokyo Institute of Technology, Yokohama, Japan)

机构地区：[1]Department of Chemistry, Faculty of Science, Tokyo University of Science, Tokyo, Japan [2]National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan [3]Pohang Accelerator Laboratory, Pohang, Korea [4]Department of Electrical Engineering, Faculty of Science and Technology, Tokyo University of Science, Noda, Japan [5]Materials and Structures Laboratory, Tokyo Institute of Technology, Yokohama, Japan

出　　处：《Journal of Materials Science and Chemical Engineering》2021年第4期1-10,共10页材料科学与化学工程（英文）

摘　　要：<div style="text-align:justify;"> Herein we have originally designed chiral azo-salen Mn(II) and Zn(II) complexes for interacting silver nanoparticles (AgNPs) exhibiting localized surface plasmon resonance (LSPR). Understanding excited state and reaction intermediate during light irradiation to return to ground state may be important for such composite systems. Therefore, we investigated such optical properties for systems using time-resolved luminescence and transient absorption measurements. DMSO solutions of the four newly prepared and characterized complexes (<strong>MMn</strong><strong>, MZn, CMn,</strong> and <strong>CZn</strong>) and ethanol solutions of the composite materials of each complex with AgNPs were served for optical measurements. The time-correlated single photon counting (TCSPC), the streak camera which is much shorter period of time than TCSPC and transient absorption measurement, was performed for the eight samples. The fluorescence lifetime of the sole complexes and the composite materials with AgNPs was derived from curve-fitting analysis of luminescence decay curves of TCSPC. Lifetime of the composite systems with AgNPs was longer than that of the corresponding sole metal complexes for three cases. It was revealed that composite systems may go through three reaction intermediates during relaxation from excited state to ground state. </div><div style="text-align:justify;"> Herein we have originally designed chiral azo-salen Mn(II) and Zn(II) complexes for interacting silver nanoparticles (AgNPs) exhibiting localized surface plasmon resonance (LSPR). Understanding excited state and reaction intermediate during light irradiation to return to ground state may be important for such composite systems. Therefore, we investigated such optical properties for systems using time-resolved luminescence and transient absorption measurements. DMSO solutions of the four newly prepared and characterized complexes (<strong>MMn</strong><strong>, MZn, CMn,</strong> and <strong>CZn</strong>) and ethanol solutions of the composite materials of each complex with AgNPs were served for optical measurements. The time-correlated single photon counting (TCSPC), the streak camera which is much shorter period of time than TCSPC and transient absorption measurement, was performed for the eight samples. The fluorescence lifetime of the sole complexes and the composite materials with AgNPs was derived from curve-fitting analysis of luminescence decay curves of TCSPC. Lifetime of the composite systems with AgNPs was longer than that of the corresponding sole metal complexes for three cases. It was revealed that composite systems may go through three reaction intermediates during relaxation from excited state to ground state. </div>

关 键 词：Schiff Base Metal Complexes AZOBENZENE Silver Nanoparticles Fluorescence Lifetime 

分 类 号：O62[理学—有机化学]