Thiophene-derivatized pyridine-biscarboxamide as a sensitizer for LnIII luminescence and 1O2 generation

Katherine R. Johnson; Manuel A. Gracia-Nava; Ana de Bettencourt-Dias

doi:10.1016/j.jlumin.2020.117309

Thiophene-derivatized pyridine-biscarboxamide as a sensitizer for Ln^III luminescence and ¹O₂ generation

Katherine R. Johnson, Manuel A. Gracia-Nava, Ana de Bettencourt-Dias

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

11 Scopus citations

Abstract

Lanthanide ion (Ln^III = Gd^III, Eu^III, Nd^III, Er^III, and Yb^III) complexes of 4-thiophen-3-yl-pyridine-2,6-dicarboxamide (1Tcbx) were isolated and their photophysical properties explored. In acetonitrile, 1Tcbx sensitizes the visible and NIR-emitting Ln^III (Ln^III = Eu^III, Yb^III, Nd^III, and Er^III) ions. Quantum yields of Ln^III sensitization are φ^Eu = 25%, φ^Yb = 0.42%, φ^Nd = 0.19%, and φ^Er = 0.01%. These luminescent complexes generate singlet oxygen (¹O₂) as well, which is monitored through its phosphorescence at 1270 nm. For the Nd^III complex, the formation of ¹O₂ was masked by the intense ⁴F_3/2 → ⁴I_13/2 transition. The efficiency of ¹O₂ generation (φ_1O2) was quantified for [Gd(1Tcbx)₃]³⁺ at 12%.

Original language	English
Article number	117309
Journal	Journal of Luminescence
Volume	224
DOIs	https://doi.org/10.1016/j.jlumin.2020.117309
State	Published - Aug 2020
Externally published	Yes

Funding

Financial support of this work through the National Science Foundation is gratefully acknowledged (Grant CHE 1800392 ).

Funders	Funder number
National Science Foundation	CHE 1800392, 1800392

Keywords

Coordination complexes
Dual-functionality
Lanthanide luminescence
Singlet oxygen generation

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10.1016/j.jlumin.2020.117309

Cite this

@article{ea1ed4b311054a6bba567ce14b3ac01a,

title = "Thiophene-derivatized pyridine-biscarboxamide as a sensitizer for LnIII luminescence and 1O2 generation",

abstract = "Lanthanide ion (LnIII = GdIII, EuIII, NdIII, ErIII, and YbIII) complexes of 4-thiophen-3-yl-pyridine-2,6-dicarboxamide (1Tcbx) were isolated and their photophysical properties explored. In acetonitrile, 1Tcbx sensitizes the visible and NIR-emitting LnIII (LnIII = EuIII, YbIII, NdIII, and ErIII) ions. Quantum yields of LnIII sensitization are φEu = 25%, φYb = 0.42%, φNd = 0.19%, and φEr = 0.01%. These luminescent complexes generate singlet oxygen (1O2) as well, which is monitored through its phosphorescence at 1270 nm. For the NdIII complex, the formation of 1O2 was masked by the intense 4F3/2 → 4I13/2 transition. The efficiency of 1O2 generation (φ1O2) was quantified for [Gd(1Tcbx)3]3+ at 12%.",

keywords = "Coordination complexes, Dual-functionality, Lanthanide luminescence, Singlet oxygen generation",

author = "Johnson, {Katherine R.} and Gracia-Nava, {Manuel A.} and {de Bettencourt-Dias}, Ana",

note = "Publisher Copyright: {\textcopyright} 2020 Elsevier B.V.",

year = "2020",

month = aug,

doi = "10.1016/j.jlumin.2020.117309",

language = "English",

volume = "224",

journal = "Journal of Luminescence",

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T1 - Thiophene-derivatized pyridine-biscarboxamide as a sensitizer for LnIII luminescence and 1O2 generation

AU - Johnson, Katherine R.

AU - Gracia-Nava, Manuel A.

AU - de Bettencourt-Dias, Ana

PY - 2020/8

Y1 - 2020/8

N2 - Lanthanide ion (LnIII = GdIII, EuIII, NdIII, ErIII, and YbIII) complexes of 4-thiophen-3-yl-pyridine-2,6-dicarboxamide (1Tcbx) were isolated and their photophysical properties explored. In acetonitrile, 1Tcbx sensitizes the visible and NIR-emitting LnIII (LnIII = EuIII, YbIII, NdIII, and ErIII) ions. Quantum yields of LnIII sensitization are φEu = 25%, φYb = 0.42%, φNd = 0.19%, and φEr = 0.01%. These luminescent complexes generate singlet oxygen (1O2) as well, which is monitored through its phosphorescence at 1270 nm. For the NdIII complex, the formation of 1O2 was masked by the intense 4F3/2 → 4I13/2 transition. The efficiency of 1O2 generation (φ1O2) was quantified for [Gd(1Tcbx)3]3+ at 12%.

AB - Lanthanide ion (LnIII = GdIII, EuIII, NdIII, ErIII, and YbIII) complexes of 4-thiophen-3-yl-pyridine-2,6-dicarboxamide (1Tcbx) were isolated and their photophysical properties explored. In acetonitrile, 1Tcbx sensitizes the visible and NIR-emitting LnIII (LnIII = EuIII, YbIII, NdIII, and ErIII) ions. Quantum yields of LnIII sensitization are φEu = 25%, φYb = 0.42%, φNd = 0.19%, and φEr = 0.01%. These luminescent complexes generate singlet oxygen (1O2) as well, which is monitored through its phosphorescence at 1270 nm. For the NdIII complex, the formation of 1O2 was masked by the intense 4F3/2 → 4I13/2 transition. The efficiency of 1O2 generation (φ1O2) was quantified for [Gd(1Tcbx)3]3+ at 12%.

KW - Coordination complexes

KW - Dual-functionality

KW - Lanthanide luminescence

KW - Singlet oxygen generation

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