Whang, Dong Ryeol You, Youngmin Chae, Weon-Sik Heo, Jeongyun Kim, Sehoon Park, Soo Young 2024-01-20T13:32:54Z 2024-01-20T13:32:54Z 2021-09-05 2012-11-06 0743-7463 https://pubs.kist.re.kr/handle/201004/128658 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 boolean AND 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 (lambda(max) = 586 nm, tau(obs) = 2.90 mu s). Meanwhile, exposure to HCl vapor switches the emission to fluorescence (lambda(max) = 514 nm, tau(obs) = 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. English AMER CHEMICAL SOC INFINITE COORDINATION POLYMERS Solid-State Phosphorescence-to-Fluorescence Switching in a Cyclometalated Ir(III) Complex Containing an Acid-Labile Chromophoric Ancillary Ligand: Implication for Multimodal Security Printing Article 10.1021/la3032013 1 LANGMUIR, v.28, no.44, pp.15433 - 15437 LANGMUIR 28 44 15433 15437 scie scopus 000310664300002 2-s2.0-84868572252 Chemistry, Multidisciplinary Chemistry, Physical Materials Science, Multidisciplinary Chemistry Materials Science Article INFINITE COORDINATION POLYMERS