title: Replacement of quinolines with isoquinolines affords target metal ion switching from Zn2+to Cd2+in the fluorescent sensor TQLN (N,N,N',N'-tetrakis(2-quinolylmethyl)-2,6-bis(aminomethyl)pyridine).
abstract: A quinoline-based heptadentate ligand, N,N,N',N'-tetrakis(2-quinolylmethyl)-2,6-bis(aminomethyl)pyridine (TQLN), exhibits a Zn2+-specific fluorescence increase at 428 nm, which is assigned to excimer emission (IZn/I0= 38, ICd/IZn= 24%, ϕZn= 0.069). In contrast, the isoquinoline counterpart 1-isoTQLN exhibits a Cd2+-specific fluorescence increase at 365 nm attributable to monomer emission (ICd/I0= 83, IZn/ICd= 19%, ϕCd= 0.015).
authors.affiliation: Department of Chemistry, Biology, and Environmental Science, Faculty of Science, Nara Women's University, Nara 630-8506, Japan. mikata@cc.nara-wu.ac.jp and KYOUSEI Science Center, Nara Women's University, Nara 630-8506, Japan and Department of Chemistry, Faculty of Science, Nara Women's University, Nara 630-8506, Japan.
authors.forename: Yuji
authors.identifier: http://orcid.org/0000-0002-9450-0908
authors.initials: Y
authors.lastname: Mikata
authors.affiliation: Department of Chemistry, Faculty of Science, Nara Women's University, Nara 630-8506, Japan.
authors.forename: Ayaka
authors.initials: A
authors.lastname: Takekoshi
authors.affiliation: Department of Chemistry, Faculty of Science, Nara Women's University, Nara 630-8506, Japan.
authors.forename: Minori
authors.initials: M
authors.lastname: Kaneda
authors.affiliation: National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan.
authors.forename: Hideo
authors.initials: H
authors.lastname: Konno
authors.affiliation: Department of Chemistry, Biology, and Environmental Science, Faculty of Science, Nara Women's University, Nara 630-8506, Japan. mikata@cc.nara-wu.ac.jp.
authors.forename: Keiko
authors.initials: K
authors.lastname: Yasuda
authors.affiliation: Department of Chemistry, Biology, and Environmental Science, Faculty of Science, Nara Women's University, Nara 630-8506, Japan. mikata@cc.nara-wu.ac.jp.
authors.forename: Masato
authors.initials: M
authors.lastname: Aoyama
authors.affiliation: Department of Chemistry, Biology, and Environmental Science, Faculty of Science, Nara Women's University, Nara 630-8506, Japan. mikata@cc.nara-wu.ac.jp.
authors.forename: Satoshi
authors.initials: S
authors.lastname: Tamotsu