Novel photo-induced aggregation behavior of a supramolecular system containing iron(III) magnetic ionic liquid and azobenzene

Takashiro Akitsu; Yasuaki Einaga

doi:10.1016/j.inoche.2006.07.018

Novel photo-induced aggregation behavior of a supramolecular system containing iron(III) magnetic ionic liquid and azobenzene

Takashiro Akitsu, Yasuaki Einaga

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

36 Citations (Scopus)

Abstract

New photo-controllable supramolecular system containing magnetic ionic liquid (iron(III) chloride with 1-butyl-3-methylimidazolium chloride) and azobenzene has been prepared. Reversible structural changes due to cis-trans photoisomerization of azobenzene could be observed by means of resonance Raman and electronic spectroscopy. Field dependence of magnetic moment at 298 K exhibited paramagnetic behavior similar to pure iron(III) magnetic ionic liquid. Alternate irradiation of UV and visible light at 298 K resulted in a monotonous increase of magnetic moment. In analogy with previous study, the novel behavior can be explained as irreversible aggregation of paramagnetic iron(III) complexes forming a short-range order in the supramolecular system.

Original language	English
Pages (from-to)	1108-1110
Number of pages	3
Journal	Inorganic Chemistry Communications
Volume	9
Issue number	11
DOIs	https://doi.org/10.1016/j.inoche.2006.07.018
Publication status	Published - 2006 Nov

Keywords

Azobenzene
Iron(III)
Magnetic ionic liquid
Photofunctional materials
Supramolecular chemistry

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

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10.1016/j.inoche.2006.07.018

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title = "Novel photo-induced aggregation behavior of a supramolecular system containing iron(III) magnetic ionic liquid and azobenzene",

abstract = "New photo-controllable supramolecular system containing magnetic ionic liquid (iron(III) chloride with 1-butyl-3-methylimidazolium chloride) and azobenzene has been prepared. Reversible structural changes due to cis-trans photoisomerization of azobenzene could be observed by means of resonance Raman and electronic spectroscopy. Field dependence of magnetic moment at 298 K exhibited paramagnetic behavior similar to pure iron(III) magnetic ionic liquid. Alternate irradiation of UV and visible light at 298 K resulted in a monotonous increase of magnetic moment. In analogy with previous study, the novel behavior can be explained as irreversible aggregation of paramagnetic iron(III) complexes forming a short-range order in the supramolecular system.",

keywords = "Azobenzene, Iron(III), Magnetic ionic liquid, Photofunctional materials, Supramolecular chemistry",

author = "Takashiro Akitsu and Yasuaki Einaga",

note = "Funding Information: This work was supported by Grant-in-Aid for the 21st Century COE program {\textquoteleft}KEIO Life Conjugate Chemistry{\textquoteright} from the Ministry of Education, Culture, Sports, Science, and Technology, Japan. The authors thank Professor Tohru Yamada and Dr. Taketo Ikeno (Keio University) for the use of the DSC apparatus and Professor Tetsuya Sato (Keio University) for the use of SQUID instrument and helpful suggestion about the measurement.",

year = "2006",

month = nov,

doi = "10.1016/j.inoche.2006.07.018",

language = "English",

volume = "9",

pages = "1108--1110",

journal = "Inorganic Chemistry Communication",

issn = "1387-7003",

publisher = "Elsevier BV",

number = "11",

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T1 - Novel photo-induced aggregation behavior of a supramolecular system containing iron(III) magnetic ionic liquid and azobenzene

AU - Akitsu, Takashiro

AU - Einaga, Yasuaki

N1 - Funding Information: This work was supported by Grant-in-Aid for the 21st Century COE program ‘KEIO Life Conjugate Chemistry’ from the Ministry of Education, Culture, Sports, Science, and Technology, Japan. The authors thank Professor Tohru Yamada and Dr. Taketo Ikeno (Keio University) for the use of the DSC apparatus and Professor Tetsuya Sato (Keio University) for the use of SQUID instrument and helpful suggestion about the measurement.

PY - 2006/11

Y1 - 2006/11

N2 - New photo-controllable supramolecular system containing magnetic ionic liquid (iron(III) chloride with 1-butyl-3-methylimidazolium chloride) and azobenzene has been prepared. Reversible structural changes due to cis-trans photoisomerization of azobenzene could be observed by means of resonance Raman and electronic spectroscopy. Field dependence of magnetic moment at 298 K exhibited paramagnetic behavior similar to pure iron(III) magnetic ionic liquid. Alternate irradiation of UV and visible light at 298 K resulted in a monotonous increase of magnetic moment. In analogy with previous study, the novel behavior can be explained as irreversible aggregation of paramagnetic iron(III) complexes forming a short-range order in the supramolecular system.

AB - New photo-controllable supramolecular system containing magnetic ionic liquid (iron(III) chloride with 1-butyl-3-methylimidazolium chloride) and azobenzene has been prepared. Reversible structural changes due to cis-trans photoisomerization of azobenzene could be observed by means of resonance Raman and electronic spectroscopy. Field dependence of magnetic moment at 298 K exhibited paramagnetic behavior similar to pure iron(III) magnetic ionic liquid. Alternate irradiation of UV and visible light at 298 K resulted in a monotonous increase of magnetic moment. In analogy with previous study, the novel behavior can be explained as irreversible aggregation of paramagnetic iron(III) complexes forming a short-range order in the supramolecular system.

KW - Azobenzene

KW - Iron(III)

KW - Magnetic ionic liquid

KW - Photofunctional materials

KW - Supramolecular chemistry

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DO - 10.1016/j.inoche.2006.07.018

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SN - 1387-7003

VL - 9

SP - 1108

EP - 1110

JO - Inorganic Chemistry Communication

JF - Inorganic Chemistry Communication

IS - 11

ER -

Novel photo-induced aggregation behavior of a supramolecular system containing iron(III) magnetic ionic liquid and azobenzene

Abstract

Keywords

ASJC Scopus subject areas

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