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2016 Fiscal Year Final Research Report

Multifunctional inorganic-organic composite phosphors with lanthanide complexes embedded in fibrous clays

Research Project

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Project/Area Number 26620064
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Functional solid state chemistry
Research InstitutionOsaka University

Principal Investigator

Kaizaki Sumio  大阪大学, 産学連携本部, 特任教授 (20089874)

Co-Investigator(Renkei-kenkyūsha) YMAZAKI Suzuko  山口大学, 大学院創成科学研究科 理学系学域 化学分野, 教授 (80202240)
NAKATA Hiroyasu  大阪教育大学, 教育学部, 教授 (60116069)
Research Collaborator MATSUMURA Takeko  (有)ミネルバライトラボ, 代表
KAJIWARA Atsushi  奈良教育大学, 教授
SHIROTANI Dai  大阪大学, 産学連携本部, 実験補助
IWAMATSU Masako  大阪大学, 産学連携本部, 実験補助
KATO Yumiko  大阪大学, 産学連携本部, 実験補助
TOYA Keiko  大阪大学, 産学連携本部, 実験補助
Project Period (FY) 2014-04-01 – 2017-03-31
Keywordsfibrous clays / multifunction / photostability / Lanthanide phosphors / Temperature dependence
Outline of Final Research Achievements

Multifunctional luminescence such as temperature dependent luminescence for the phosphors, Ligand@SEP:Ln, are exhibited where light harvesting ligands such as 1,10-phenanthroline (phen) and/or 1,4-dibenzoylbenzene(dbb) coordinate with Eu(III) and Tb(III) complexes embedded into fibrous magnesium silicate clay sepiolite(SEP) in which the magnesium ion are ion exchanged. For these phosphors, a variety of the photostability are observed under UV (300 nm) irradiation; decreasing 50 % of the 4f-4f luminescence intensity after 10 min for phen@SEP:Eu3+, probably due to the decomposition of phen, whereas increasing 20 % of the intensity for dbb@SEP:Eu3+ and dbb@SEP:Tb3+ after 20 min. This may be elucidated by the thermoluminescence in connection with the trapped electrons in the SEP clay. The photostable practically usable naked eye visible phosphor is prepared by considering the difference of ligands in photostability.

Free Research Field

錯体化学

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Published: 2018-03-22  

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