Solid-state phosphorescence-to-fluorescence switching in a cyclometalated Ir(iii) complex containing an acid-labile chromophoric ancillary ligand: Implication for multimodal security printing

Dong Ryeol Whang, Youngmin You, Weon Sik Chae, Jeongyun Heo, Sehoon Kim, Soo Young Park

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

In this study, we have demonstrated the reconstruction of encrypted information by employing photoluminescence spectra and lifetimes of a phosphorescent Ir(III) complex (IrHBT). IrHBT was constructed on the basis of a heteroleptic structure comprising a fluorescent N^O ancillary ligand. From the viewpoint of information security, the transformation of the Ir(III) complex between phosphorescent and fluorescent states can be encoded with chemical/photoirradiation methods. Thin polymer films (poly(methylmethacrylate), PMMA) doped with IrHBT display long-lived emission typical of phosphorescence (λmax = 586 nm, τobs = 2.90 μs). Meanwhile, exposure to HCl vapor switches the emission to fluorescence (λ max = 514 nm, τobs = 1.53 ns) with drastic changes in both the photoluminescence color and lifetime. Security printing on paper impregnated with IrHBT or on a PMMA film containing IrHBT and photoacid generator (triphenylsulfonium triflate) enables the bimodal readout of photoluminescence color and lifetime.

Original languageEnglish
Pages (from-to)15433-15437
Number of pages5
JournalLangmuir
Volume28
Issue number44
DOIs
Publication statusPublished - 2012 Nov 6
Externally publishedYes

Fingerprint

Phosphorescence
Printing
Polymethyl Methacrylate
phosphorescence
printing
Photoluminescence
Color
Fluorescence
Ligands
Methylmethacrylate
solid state
photoluminescence
life (durability)
fluorescence
ligands
acids
Acids
color
Polymers
Security of data

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

Cite this

Solid-state phosphorescence-to-fluorescence switching in a cyclometalated Ir(iii) complex containing an acid-labile chromophoric ancillary ligand : Implication for multimodal security printing. / Whang, Dong Ryeol; You, Youngmin; Chae, Weon Sik; Heo, Jeongyun; Kim, Sehoon; Park, Soo Young.

In: Langmuir, Vol. 28, No. 44, 06.11.2012, p. 15433-15437.

Research output: Contribution to journalArticle

@article{bbd30d4abc9f4ba29e6b53e505904800,
title = "Solid-state phosphorescence-to-fluorescence switching in a cyclometalated Ir(iii) complex containing an acid-labile chromophoric ancillary ligand: Implication for multimodal security printing",
abstract = "In this study, we have demonstrated the reconstruction of encrypted information by employing photoluminescence spectra and lifetimes of a phosphorescent Ir(III) complex (IrHBT). IrHBT was constructed on the basis of a heteroleptic structure comprising a fluorescent N^O ancillary ligand. From the viewpoint of information security, the transformation of the Ir(III) complex between phosphorescent and fluorescent states can be encoded with chemical/photoirradiation methods. Thin polymer films (poly(methylmethacrylate), PMMA) doped with IrHBT display long-lived emission typical of phosphorescence (λmax = 586 nm, τobs = 2.90 μs). Meanwhile, exposure to HCl vapor switches the emission to fluorescence (λ max = 514 nm, τobs = 1.53 ns) with drastic changes in both the photoluminescence color and lifetime. Security printing on paper impregnated with IrHBT or on a PMMA film containing IrHBT and photoacid generator (triphenylsulfonium triflate) enables the bimodal readout of photoluminescence color and lifetime.",
author = "Whang, {Dong Ryeol} and Youngmin You and Chae, {Weon Sik} and Jeongyun Heo and Sehoon Kim and Park, {Soo Young}",
year = "2012",
month = "11",
day = "6",
doi = "10.1021/la3032013",
language = "English",
volume = "28",
pages = "15433--15437",
journal = "Langmuir",
issn = "0743-7463",
publisher = "American Chemical Society",
number = "44",

}

TY - JOUR

T1 - Solid-state phosphorescence-to-fluorescence switching in a cyclometalated Ir(iii) complex containing an acid-labile chromophoric ancillary ligand

T2 - Implication for multimodal security printing

AU - Whang, Dong Ryeol

AU - You, Youngmin

AU - Chae, Weon Sik

AU - Heo, Jeongyun

AU - Kim, Sehoon

AU - Park, Soo Young

PY - 2012/11/6

Y1 - 2012/11/6

N2 - In this study, we have demonstrated the reconstruction of encrypted information by employing photoluminescence spectra and lifetimes of a phosphorescent Ir(III) complex (IrHBT). IrHBT was constructed on the basis of a heteroleptic structure comprising a fluorescent N^O ancillary ligand. From the viewpoint of information security, the transformation of the Ir(III) complex between phosphorescent and fluorescent states can be encoded with chemical/photoirradiation methods. Thin polymer films (poly(methylmethacrylate), PMMA) doped with IrHBT display long-lived emission typical of phosphorescence (λmax = 586 nm, τobs = 2.90 μs). Meanwhile, exposure to HCl vapor switches the emission to fluorescence (λ max = 514 nm, τobs = 1.53 ns) with drastic changes in both the photoluminescence color and lifetime. Security printing on paper impregnated with IrHBT or on a PMMA film containing IrHBT and photoacid generator (triphenylsulfonium triflate) enables the bimodal readout of photoluminescence color and lifetime.

AB - In this study, we have demonstrated the reconstruction of encrypted information by employing photoluminescence spectra and lifetimes of a phosphorescent Ir(III) complex (IrHBT). IrHBT was constructed on the basis of a heteroleptic structure comprising a fluorescent N^O ancillary ligand. From the viewpoint of information security, the transformation of the Ir(III) complex between phosphorescent and fluorescent states can be encoded with chemical/photoirradiation methods. Thin polymer films (poly(methylmethacrylate), PMMA) doped with IrHBT display long-lived emission typical of phosphorescence (λmax = 586 nm, τobs = 2.90 μs). Meanwhile, exposure to HCl vapor switches the emission to fluorescence (λ max = 514 nm, τobs = 1.53 ns) with drastic changes in both the photoluminescence color and lifetime. Security printing on paper impregnated with IrHBT or on a PMMA film containing IrHBT and photoacid generator (triphenylsulfonium triflate) enables the bimodal readout of photoluminescence color and lifetime.

UR - http://www.scopus.com/inward/record.url?scp=84868572252&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84868572252&partnerID=8YFLogxK

U2 - 10.1021/la3032013

DO - 10.1021/la3032013

M3 - Article

C2 - 23083339

AN - SCOPUS:84868572252

VL - 28

SP - 15433

EP - 15437

JO - Langmuir

JF - Langmuir

SN - 0743-7463

IS - 44

ER -