Near-Infrared-to-Visible Photon Upconversion Sensitized by a Metal Complex with Spin-Forbidden yet Strong S0-T1 Absorption

Shogo Amemori, Yoichi Sasaki, Nobuhiro Yanai, Nobuo Kimizuka

Research output: Contribution to journalArticle

51 Citations (Scopus)

Abstract

Near-infrared (NIR)-to-visible (vis) photon upconversion (UC) is useful for various applications; however, it remains challenging in triplet-triplet annihilation-based UC, mainly due to the energy loss during the S1-to-T1 intersystem crossing (ISC) of molecular sensitizers. In this work, we circumvent this energy loss by employing a sensitizer with direct S0-to-T1 absorption in the NIR region. A mixed solution of an osmium complex having a strong S0-T1 absorption and rubrene emitter upconverts NIR light ( = 938 nm) to visible light ( = 570 nm). Sensitizer-doped emitter nanoparticles are prepared by re-precipitation and dispersed into an oxygen-barrier polymer. The obtained composite film shows a stable NIR-to-vis UC emission based on triplet energy migration (TEM), even in air. A high UC quantum yield of 3.1% is observed for this TEM-UC system, expanding the scope of molecular sensitizers for NIR-to-vis UC.

Original languageEnglish
Pages (from-to)8702-8705
Number of pages4
JournalJournal of the American Chemical Society
Volume138
Issue number28
DOIs
Publication statusPublished - Jul 20 2016

Fingerprint

Coordination Complexes
Metal complexes
Photons
Infrared radiation
Osmium
Light
Nanoparticles
Polymers
Air
Oxygen
Energy dissipation
Composite films
Quantum yield
rubrene

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

Cite this

Near-Infrared-to-Visible Photon Upconversion Sensitized by a Metal Complex with Spin-Forbidden yet Strong S0-T1 Absorption. / Amemori, Shogo; Sasaki, Yoichi; Yanai, Nobuhiro; Kimizuka, Nobuo.

In: Journal of the American Chemical Society, Vol. 138, No. 28, 20.07.2016, p. 8702-8705.

Research output: Contribution to journalArticle

@article{7904cfd86bc04519ae8cb89012fcffe6,
title = "Near-Infrared-to-Visible Photon Upconversion Sensitized by a Metal Complex with Spin-Forbidden yet Strong S0-T1 Absorption",
abstract = "Near-infrared (NIR)-to-visible (vis) photon upconversion (UC) is useful for various applications; however, it remains challenging in triplet-triplet annihilation-based UC, mainly due to the energy loss during the S1-to-T1 intersystem crossing (ISC) of molecular sensitizers. In this work, we circumvent this energy loss by employing a sensitizer with direct S0-to-T1 absorption in the NIR region. A mixed solution of an osmium complex having a strong S0-T1 absorption and rubrene emitter upconverts NIR light ( = 938 nm) to visible light ( = 570 nm). Sensitizer-doped emitter nanoparticles are prepared by re-precipitation and dispersed into an oxygen-barrier polymer. The obtained composite film shows a stable NIR-to-vis UC emission based on triplet energy migration (TEM), even in air. A high UC quantum yield of 3.1{\%} is observed for this TEM-UC system, expanding the scope of molecular sensitizers for NIR-to-vis UC.",
author = "Shogo Amemori and Yoichi Sasaki and Nobuhiro Yanai and Nobuo Kimizuka",
year = "2016",
month = "7",
day = "20",
doi = "10.1021/jacs.6b04692",
language = "English",
volume = "138",
pages = "8702--8705",
journal = "Journal of the American Chemical Society",
issn = "0002-7863",
publisher = "American Chemical Society",
number = "28",

}

TY - JOUR

T1 - Near-Infrared-to-Visible Photon Upconversion Sensitized by a Metal Complex with Spin-Forbidden yet Strong S0-T1 Absorption

AU - Amemori, Shogo

AU - Sasaki, Yoichi

AU - Yanai, Nobuhiro

AU - Kimizuka, Nobuo

PY - 2016/7/20

Y1 - 2016/7/20

N2 - Near-infrared (NIR)-to-visible (vis) photon upconversion (UC) is useful for various applications; however, it remains challenging in triplet-triplet annihilation-based UC, mainly due to the energy loss during the S1-to-T1 intersystem crossing (ISC) of molecular sensitizers. In this work, we circumvent this energy loss by employing a sensitizer with direct S0-to-T1 absorption in the NIR region. A mixed solution of an osmium complex having a strong S0-T1 absorption and rubrene emitter upconverts NIR light ( = 938 nm) to visible light ( = 570 nm). Sensitizer-doped emitter nanoparticles are prepared by re-precipitation and dispersed into an oxygen-barrier polymer. The obtained composite film shows a stable NIR-to-vis UC emission based on triplet energy migration (TEM), even in air. A high UC quantum yield of 3.1% is observed for this TEM-UC system, expanding the scope of molecular sensitizers for NIR-to-vis UC.

AB - Near-infrared (NIR)-to-visible (vis) photon upconversion (UC) is useful for various applications; however, it remains challenging in triplet-triplet annihilation-based UC, mainly due to the energy loss during the S1-to-T1 intersystem crossing (ISC) of molecular sensitizers. In this work, we circumvent this energy loss by employing a sensitizer with direct S0-to-T1 absorption in the NIR region. A mixed solution of an osmium complex having a strong S0-T1 absorption and rubrene emitter upconverts NIR light ( = 938 nm) to visible light ( = 570 nm). Sensitizer-doped emitter nanoparticles are prepared by re-precipitation and dispersed into an oxygen-barrier polymer. The obtained composite film shows a stable NIR-to-vis UC emission based on triplet energy migration (TEM), even in air. A high UC quantum yield of 3.1% is observed for this TEM-UC system, expanding the scope of molecular sensitizers for NIR-to-vis UC.

UR - http://www.scopus.com/inward/record.url?scp=84979256998&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84979256998&partnerID=8YFLogxK

U2 - 10.1021/jacs.6b04692

DO - 10.1021/jacs.6b04692

M3 - Article

AN - SCOPUS:84979256998

VL - 138

SP - 8702

EP - 8705

JO - Journal of the American Chemical Society

JF - Journal of the American Chemical Society

SN - 0002-7863

IS - 28

ER -