Hetero-trinuclear near-infrared (NIR) luminescent Zn2Ln complexes from Salen-type Schiff-base ligands

Weiyu Bi; Tao Wei; Xingqiang Lü; Yani Hui; Jirong Song; Shunsheng Zhao; Rick W K WONG; Richard A. Jones

doi:10.1039/b9nj00228f

Hetero-trinuclear near-infrared (NIR) luminescent Zn₂Ln complexes from Salen-type Schiff-base ligands

Weiyu Bi, Tao Wei, Xingqiang Lü^*, Yani Hui, Jirong Song, Shunsheng Zhao, Rick W K WONG, Richard A. Jones

^*Corresponding author for this work

Department of Chemistry

Research output: Contribution to journal › Journal article › peer-review

59 Citations (Scopus)

Abstract

With the Zn-Schiff-base [ZnL¹(Py)] or [ZnL²(Py)] from the simple Salen-type Schiff-base ligand H₂L¹ or H ₂L² (H₂L¹: N,N′- bis(salicylidene)ethylene-1,2-diamine; H₂L²: N,N′-bis(salicylidene)phenylene-1,2-diamine) without the outer O ₂O₂ portion as the precursor, two series of eight trinuclear Zn₂Ln arrayed complexes (Ln = Nd (1 or 5), Yb (2 or 6), Er (3 or 7) or Gd (4 or 8)) have been obtained by the further reaction with Ln(NO₃)₃·6H₂O, respectively. The results of photophysical studies show that the strong and characteristic NIR luminescence with emissive lifetimes in microsecond ranges, has been sensitized from the excited state (¹LC and ³LC or only ¹LC) of the ligand, whereas the Zn(ii)-based visible luminescence is mostly quenched because of quite effective intramolecular energy transfer from the ligand-centered excited state of the Zn(ii)-Schiff base complex to Ln(iii) ions.

Original language	English
Pages (from-to)	2326-2334
Number of pages	9
Journal	New Journal of Chemistry
Volume	33
Issue number	11
DOIs	https://doi.org/10.1039/b9nj00228f
Publication status	Published - 2009

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title = "Hetero-trinuclear near-infrared (NIR) luminescent Zn2Ln complexes from Salen-type Schiff-base ligands",

abstract = "With the Zn-Schiff-base [ZnL1(Py)] or [ZnL2(Py)] from the simple Salen-type Schiff-base ligand H2L1 or H 2L2 (H2L1: N,N′- bis(salicylidene)ethylene-1,2-diamine; H2L2: N,N′-bis(salicylidene)phenylene-1,2-diamine) without the outer O 2O2 portion as the precursor, two series of eight trinuclear Zn2Ln arrayed complexes (Ln = Nd (1 or 5), Yb (2 or 6), Er (3 or 7) or Gd (4 or 8)) have been obtained by the further reaction with Ln(NO3)3·6H2O, respectively. The results of photophysical studies show that the strong and characteristic NIR luminescence with emissive lifetimes in microsecond ranges, has been sensitized from the excited state (1LC and 3LC or only 1LC) of the ligand, whereas the Zn(ii)-based visible luminescence is mostly quenched because of quite effective intramolecular energy transfer from the ligand-centered excited state of the Zn(ii)-Schiff base complex to Ln(iii) ions.",

author = "Weiyu Bi and Tao Wei and Xingqiang L{\"u} and Yani Hui and Jirong Song and Shunsheng Zhao and WONG, {Rick W K} and Jones, {Richard A.}",

year = "2009",

doi = "10.1039/b9nj00228f",

language = "English",

volume = "33",

pages = "2326--2334",

journal = "New Journal of Chemistry",

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publisher = "Royal Society of Chemistry",

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TY - JOUR

T1 - Hetero-trinuclear near-infrared (NIR) luminescent Zn2Ln complexes from Salen-type Schiff-base ligands

AU - Bi, Weiyu

AU - Wei, Tao

AU - Lü, Xingqiang

AU - Hui, Yani

AU - Song, Jirong

AU - Zhao, Shunsheng

AU - WONG, Rick W K

AU - Jones, Richard A.

PY - 2009

Y1 - 2009

N2 - With the Zn-Schiff-base [ZnL1(Py)] or [ZnL2(Py)] from the simple Salen-type Schiff-base ligand H2L1 or H 2L2 (H2L1: N,N′- bis(salicylidene)ethylene-1,2-diamine; H2L2: N,N′-bis(salicylidene)phenylene-1,2-diamine) without the outer O 2O2 portion as the precursor, two series of eight trinuclear Zn2Ln arrayed complexes (Ln = Nd (1 or 5), Yb (2 or 6), Er (3 or 7) or Gd (4 or 8)) have been obtained by the further reaction with Ln(NO3)3·6H2O, respectively. The results of photophysical studies show that the strong and characteristic NIR luminescence with emissive lifetimes in microsecond ranges, has been sensitized from the excited state (1LC and 3LC or only 1LC) of the ligand, whereas the Zn(ii)-based visible luminescence is mostly quenched because of quite effective intramolecular energy transfer from the ligand-centered excited state of the Zn(ii)-Schiff base complex to Ln(iii) ions.

AB - With the Zn-Schiff-base [ZnL1(Py)] or [ZnL2(Py)] from the simple Salen-type Schiff-base ligand H2L1 or H 2L2 (H2L1: N,N′- bis(salicylidene)ethylene-1,2-diamine; H2L2: N,N′-bis(salicylidene)phenylene-1,2-diamine) without the outer O 2O2 portion as the precursor, two series of eight trinuclear Zn2Ln arrayed complexes (Ln = Nd (1 or 5), Yb (2 or 6), Er (3 or 7) or Gd (4 or 8)) have been obtained by the further reaction with Ln(NO3)3·6H2O, respectively. The results of photophysical studies show that the strong and characteristic NIR luminescence with emissive lifetimes in microsecond ranges, has been sensitized from the excited state (1LC and 3LC or only 1LC) of the ligand, whereas the Zn(ii)-based visible luminescence is mostly quenched because of quite effective intramolecular energy transfer from the ligand-centered excited state of the Zn(ii)-Schiff base complex to Ln(iii) ions.

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U2 - 10.1039/b9nj00228f

DO - 10.1039/b9nj00228f

M3 - Journal article

AN - SCOPUS:70350774526

SN - 1144-0546

VL - 33

SP - 2326

EP - 2334

JO - New Journal of Chemistry

JF - New Journal of Chemistry

IS - 11

ER -

Hetero-trinuclear near-infrared (NIR) luminescent Zn₂Ln complexes from Salen-type Schiff-base ligands

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