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Zhang Q.,CAS Suzhou Institute of Nano Technology and Nano Bionics | Zhang Q.,University of Chinese Academy of Sciences | Zhang Q.,CAS Institute of Chemistry | Cao R.,CAS Suzhou Institute of Nano Technology and Nano Bionics | And 4 more authors.
Dalton Transactions | Year: 2014

Two phosphorescent iridium(iii) complexes conjugated to a lipophilic triphenylphosphonium cation moiety, IrMitoOlivine and IrMitoNIR, were synthesized. The complexes show high mitochondria-specificity and relatively lower cytotoxicity. Time-lapse confocal imaging indicates that both complexes exhibit an excellent anti-photobleaching capability under continuous laser irradiation. © 2014 the Partner Organisations.


Zhuang J.,Soochow University of China | Zhuang J.,CAS Suzhou Institute of Nano Technology and Nano Bionics | Li W.,CAS Suzhou Institute of Nano Technology and Nano Bionics | Li W.,SunaTech Inc. | And 6 more authors.
Organic Electronics: physics, materials, applications | Year: 2013

Homoleptic triscyclometalated iridium(III) complex Ir(dbi)3 was used as a dopant for sky blue phosphorescent organic light-emitting diodes (PHOLEDs). Its photophysical, thermal, electrochemical properties as well as the device performances were investigated. Ir(dbi)3 exhibited high quantum yield of 0.52 in solution at room temperature. A maximum current efficiency and external quantum efficiency (EQE) of 61.5 cd A-1 and 23.1% were obtained, which are the highest ever reported for blue homoleptic iridium complexes. High efficiencies of 53.5 cd A-1 and 20.1% EQE were achieved even at the luminance of 1000 cd m-2. © 2013 Elsevier B.V.


Zhuang J.,Soochow University of China | Zhuang J.,CAS Suzhou Institute of Nano Technology and Nano Bionics | Su W.,CAS Suzhou Institute of Nano Technology and Nano Bionics | Li W.,CAS Suzhou Institute of Nano Technology and Nano Bionics | And 5 more authors.
Organic Electronics: physics, materials, applications | Year: 2012

A series of structurally isomeric carbazole/triazole (TAZ)-based bipolar host materials 1-4 were designed and synthesized. These new materials were found to exhibit wide energy gaps (E g: 3.29-3.52 eV), high triplet energies (E T: 2.56-2.76 eV), high thermal stability (T d: 426-454 °C), high glass-transition temperatures (T g: 116-156 °C) and excellent film-forming property. Green and blue emitting devices with fac-tris(2-phenylpyridine)iridium (Ir(ppy) 3) and iridium(III) bis(4,6-(di-fluorophenyl)pyridinato-N,C 2′)picolinate (FIrpic) as phosphorescent dopants have been fabricated. The measurements of turn-on voltages, efficiencies and luminance suggested that the practice of combining carbazole's high triplet energy and excellent hole-transporting ability with TAZ's electron-transporting ability at the molecular level was effectively translated into better performance at the device level. The molecular structure of compound 4 is well-correlated with its efficiencies, which (32.7 and 21.1 cd/A for green and blue devices, respectively) were the best among the four materials. © 2012 Elsevier B.V. All rights reserved.


Zhang Q.,CAS Suzhou Institute of Nano Technology and Nano Bionics | Zhang Q.,University of Chinese Academy of Sciences | Zhang Q.,CAS Institute of Chemistry | Zhou M.,CAS Suzhou Institute of Nano Technology and Nano Bionics | Zhou M.,SunaTech Inc.
Talanta | Year: 2014

A ratiometric pH probe composed of a fluorescein moiety and an ionic near-infrared-emitting phosphorescent cyclometalated iridium(III) complex bis(6-(benzo[b]thien-2-yl)phenanthridinato)(4-(3-carboxypropyl)-4′-methyl-2,2′-bipyridine)iridium(III) was synthesized. With good cell permeability, the probe demonstrated a linear ratiometric response to the pH variation in the physiological range in HeLa cell assay. © 2014 Elsevier B.V. All rights reserved.


Li Y.,CAS Suzhou Institute of Nano Technology and Nano Bionics | Li Y.,University of Chinese Academy of Sciences | Liu Y.,CAS Suzhou Institute of Nano Technology and Nano Bionics | Liu Y.,SunaTech Inc. | And 2 more authors.
Dalton Transactions | Year: 2012

Biscyclometalated iridium(III) complexes with an ancillary acetylacetone ligand, Ir(L) 2(acac), (L = 2-(benzo[b]thiophen-2-yl)pyridine (btp), 1-phenylisoquinoline (piq), 2-phenylbenzothiazole (bt), 2-phenylpyridine (ppy), acac = deprotonated acetylacetone), demonstrate spectroscopic changes in their UV-Vis absorption and luminescent emission under acidic conditions. Such changes were found to be the same as those observed when certain mercury salts exist in the systems. Because some iridium(III) complexes have sulfur-containing ligands (i.e., btp and bt), a question was then raised as for whether or not the spectroscopic changes are associated with the specific affinity of Hg 2+ to the sulfur atom. Extensive studies performed in this work unambiguously proved that the observed spectroscopic changes were solely the results of the acid induced departure of acac and the follow-up coordination of solvent acetonitrile to the iridium(III) center and that the generally anticipated Hg 2+-S affinity and its effect on the photophysical properties of iridium(III) luminophores did not play a role. © The Royal Society of Chemistry 2012.


Zhou Y.,CAS Suzhou Institute of Nano Technology and Nano Bionics | Zhou Y.,University of Chinese Academy of Sciences | Jia J.,CAS Suzhou Institute of Nano Technology and Nano Bionics | Li W.,CAS Suzhou Institute of Nano Technology and Nano Bionics | And 4 more authors.
Chemical Communications | Year: 2013

Five iridium(iii) complexes with two N-heterocyclic carbene (NHC) ligands and an ancillary ligand have been designed and successfully synthesized. With multicolor photoluminescence and low toxicity, these carbene complexes were tested, for the first time, as living cell imaging reagents and showed promise for application beyond the OLED (organic light emitting diode) area. © 2013 The Royal Society of Chemistry.


Jia J.,CAS Suzhou Institute of Nano Technology and Nano Bionics | Fei H.,CAS Suzhou Institute of Nano Technology and Nano Bionics | Zhou M.,CAS Suzhou Institute of Nano Technology and Nano Bionics | Zhou M.,SunaTech Inc.
Electrophoresis | Year: 2012

This article reports a new class of luminescent metal complexes, biscyclometalated iridium(III) complexes with an ancillary bathophenanthroline disulfonate ligand, for staining protein bands that are separated by electrophoresis. The performances of these novel staining agents have been studied in comparison with tris(bathophenanthroline disulfonate) ruthenium(II) tetrasodium salt (i.e. RuBPS) using a commercially available imaging system. The staining agents showed different limits of detection, linear dynamic ranges, and protein-to-protein variations. The overall performances of all three stains were found to be better than or equivalent to RuBPS under the experimental conditions. © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.


Zhuang J.,CAS Suzhou Institute of Nano Technology and Nano Bionics | Li W.,CAS Suzhou Institute of Nano Technology and Nano Bionics | Su W.,CAS Suzhou Institute of Nano Technology and Nano Bionics | Zhou M.,SunaTech Inc. | Cui Z.,CAS Suzhou Institute of Nano Technology and Nano Bionics
New Journal of Chemistry | Year: 2014

A novel bipolar host material 9-(3-(5-(4-(diphenylphosphoryl)phenyl)-4- phenyl-4H-1,2,4-triazol-3-yl)phenyl)-9H-carbazole (CTPO) with carbazole, triazole and phosphine oxide moieties was designed and synthesized. CTPO was found to exhibit a high glass transition temperature (Tg = 127 °C), suitable HOMO and LUMO levels (5.65 and 2.42 eV), a high triplet energy (3.06 eV) and excellent bipolar properties. A device with 15 wt% doping concentration showed a low turn-on voltage of 2.5 V and maximum current and power efficiencies of 41.6 cd A-1 and 43.0 lm W-1, respectively. A high efficiency of 40.1 cd A-1 was achieved at the brightness of 100 cd m-2. Even at a high luminance of 1000 cd m -2, the efficiency remained as high as 35.2 cd A-1. © 2014 The Royal Society of Chemistry and the Centre National de la Recherche Scientifique.


Yu L.,CAS Suzhou Institute of Nano Technology and Nano Bionics | Huang Z.,CAS Suzhou Institute of Nano Technology and Nano Bionics | Liu Y.,CAS Suzhou Institute of Nano Technology and Nano Bionics | Liu Y.,SunaTech Inc. | And 2 more authors.
Journal of Organometallic Chemistry | Year: 2012

Water soluble cyclometalated iridium(III) complexes with disulfonated bathophenanthroline (DSBP 2-) ligand, Ir(L) 2DSBPNa (L = 2-phenylpyridine (ppy), 2-phenylbenzothiazole (bt), 1-phenylisoquinoline (piq), and 2,4-difluorophenylpyridine (fppy)), were synthesized and compared with each other electrochemically and spectroscopically in the search for better luminophores potentially useful for the electrochemiluminescence (ECL) based analytical applications. ECL measurement of Ir(L) 2DSBPNa in tripropylamine (TPA) containing aqueous buffer solutions led to a conclusion that their high photoluminescence quantum yields (φ PL) do not necessarily mean high ECL intensities, due presumably to the complexity of the ECL process. Under the experimental conditions, the ECL intensities of Ir(L) 2DSBPNa were found to be lower than that of ruthenium(II) trisbipyridine reference. A cyclic voltammetric study has revealed that the oxidative states of some iridium(III) complexes are unstable. © 2012 Elsevier B.V. All rights reserved.


Yu L.,SunaTech Inc. | Liu Y.,SunaTech Inc. | Zhou M.,Rubipy Scientific Inc.
Analytical and Bioanalytical Chemistry | Year: 2016

Ruthenium(II) complexes with carboxylic acid as a bioconjugatable group, i.e., [Ru(bathophenanthroline disulfonate)(2,2′-bipyridine)(4-methyl-4′-(3-carboxypropyl)-2,2′-bipyridine)]0, (C49H38N6O8S2Ru), and [Ru(bathophenanthroline disulfonate)2(4-methyl-4′-(3-carboxypropyl)-2,2′-bipyridine)]2− · 2Na+, (C63H44N6O14S4RuNa2) were characterized spectroscopically and electrochemically. As potential labels for electrochemiluminescence (ECL) immunoassays, the ECL intensities of the free labels in homogenous aqueous buffer solutions were compared under a condition that is similar to the one employed by a commercial clinical immunoassay system. The two labels were found to be more emissive and, thus, can be detected at 10- 12 pM compared with 5× 10−12 pM of the label currently used in the commercial ECL system. Furthermore, the improved ECL emission of the free labels in homogenous solutions was proven to be translated into more intense ECL signal in heterogeneous sandwich immunoassay and, thus, leading to a lower limit of detection in immunoassay. The data obtained from these ECL labels shed light on the further development of ECL-based clinical immunoassay technology. [Figure not available: see fulltext.] © 2016 Springer-Verlag Berlin Heidelberg

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