1O2 Generating Luminescent Lanthanide Complexes with 1,8-Naphthalimide-Based Sensitizers

Katherine R. Johnson; Ana De Bettencourt-Dias

doi:10.1021/acs.inorgchem.9b02431

¹O₂ Generating Luminescent Lanthanide Complexes with 1,8-Naphthalimide-Based Sensitizers

Katherine R. Johnson, Ana De Bettencourt-Dias

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

18 Scopus citations

Abstract

Lanthanide ion (Ln^III) complexes with two new 1,8-naphthalimide-based ligands, Nap-dpe and Nap-cbx, were isolated, and their photophysical properties were explored. Upon excitation at 335 nm, Nap-dpe and Nap-cbx sensitize visible and near-infrared emitting Ln^III ions (Ln^III = Eu^III, Nd^III, and Yb^III) and generate singlet oxygen (¹O₂). The quantum yields of Eu^III luminescence for [Eu(Nap-cbx)₃]³⁺ and [Eu(Nap-dpe)₃]³⁺ are 16.7% and 8.3%, respectively, with ¹O₂ generation efficiencies of 41% and 59%, respectively. The efficiencies of ¹O₂ generation for the NIR emitting complexes [Ln(Nap-dpe)₃]³⁺ are 59% and 56%, respectively, and those for [Ln(Nap-cbx)₃]³⁺ (Ln^III = Nd^III, Yb^III) are 64% and 61%, respectively. In an oxygen-free environment, the quantum yields of Eu^III luminescence for [Eu(Nap-cbx)₃]³⁺ and [Eu(Nap-dpe)₃]³⁺ increase to 20% and 18%, respectively.

Original language	English
Pages (from-to)	13471-13480
Number of pages	10
Journal	Inorganic Chemistry
Volume	58
Issue number	19
DOIs	https://doi.org/10.1021/acs.inorgchem.9b02431
State	Published - Oct 7 2019
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

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10.1021/acs.inorgchem.9b02431

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title = "1O2 Generating Luminescent Lanthanide Complexes with 1,8-Naphthalimide-Based Sensitizers",

abstract = "Lanthanide ion (LnIII) complexes with two new 1,8-naphthalimide-based ligands, Nap-dpe and Nap-cbx, were isolated, and their photophysical properties were explored. Upon excitation at 335 nm, Nap-dpe and Nap-cbx sensitize visible and near-infrared emitting LnIII ions (LnIII = EuIII, NdIII, and YbIII) and generate singlet oxygen (1O2). The quantum yields of EuIII luminescence for [Eu(Nap-cbx)3]3+ and [Eu(Nap-dpe)3]3+ are 16.7% and 8.3%, respectively, with 1O2 generation efficiencies of 41% and 59%, respectively. The efficiencies of 1O2 generation for the NIR emitting complexes [Ln(Nap-dpe)3]3+ are 59% and 56%, respectively, and those for [Ln(Nap-cbx)3]3+ (LnIII = NdIII, YbIII) are 64% and 61%, respectively. In an oxygen-free environment, the quantum yields of EuIII luminescence for [Eu(Nap-cbx)3]3+ and [Eu(Nap-dpe)3]3+ increase to 20% and 18%, respectively.",

author = "Johnson, {Katherine R.} and {De Bettencourt-Dias}, Ana",

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N2 - Lanthanide ion (LnIII) complexes with two new 1,8-naphthalimide-based ligands, Nap-dpe and Nap-cbx, were isolated, and their photophysical properties were explored. Upon excitation at 335 nm, Nap-dpe and Nap-cbx sensitize visible and near-infrared emitting LnIII ions (LnIII = EuIII, NdIII, and YbIII) and generate singlet oxygen (1O2). The quantum yields of EuIII luminescence for [Eu(Nap-cbx)3]3+ and [Eu(Nap-dpe)3]3+ are 16.7% and 8.3%, respectively, with 1O2 generation efficiencies of 41% and 59%, respectively. The efficiencies of 1O2 generation for the NIR emitting complexes [Ln(Nap-dpe)3]3+ are 59% and 56%, respectively, and those for [Ln(Nap-cbx)3]3+ (LnIII = NdIII, YbIII) are 64% and 61%, respectively. In an oxygen-free environment, the quantum yields of EuIII luminescence for [Eu(Nap-cbx)3]3+ and [Eu(Nap-dpe)3]3+ increase to 20% and 18%, respectively.

AB - Lanthanide ion (LnIII) complexes with two new 1,8-naphthalimide-based ligands, Nap-dpe and Nap-cbx, were isolated, and their photophysical properties were explored. Upon excitation at 335 nm, Nap-dpe and Nap-cbx sensitize visible and near-infrared emitting LnIII ions (LnIII = EuIII, NdIII, and YbIII) and generate singlet oxygen (1O2). The quantum yields of EuIII luminescence for [Eu(Nap-cbx)3]3+ and [Eu(Nap-dpe)3]3+ are 16.7% and 8.3%, respectively, with 1O2 generation efficiencies of 41% and 59%, respectively. The efficiencies of 1O2 generation for the NIR emitting complexes [Ln(Nap-dpe)3]3+ are 59% and 56%, respectively, and those for [Ln(Nap-cbx)3]3+ (LnIII = NdIII, YbIII) are 64% and 61%, respectively. In an oxygen-free environment, the quantum yields of EuIII luminescence for [Eu(Nap-cbx)3]3+ and [Eu(Nap-dpe)3]3+ increase to 20% and 18%, respectively.

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JO - Inorganic Chemistry

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¹O₂ Generating Luminescent Lanthanide Complexes with 1,8-Naphthalimide-Based Sensitizers

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