1005-02-3Relevant articles and documents
A Novel Ratiometric Oxygen Sensor Based On a Sextuple Hydrogen-Bonding Self-Assembly Molecular Heterodimer
Zeng, Hui,Zhang, Cheng,Huang, Yan,Lu, Zhiyun
, p. 873 - 877 (2016)
A novel sextuple hydrogen-bonding (HB) self-assembly molecular heterodimer bearing an iridium complex as the indicator dye and two carbazoles as the reference dye, namely 6HB-Irbt-Cz, was synthesized, and its molecular structure was confirmed by1H NMR,13CNMR, TOF-MS and 2D NMR. Because of the inefficient energy transfer process between the carbazole and iridium complex units, 6HB-Irbt-Cz exhibits distinct ?uorescence/phosphorescence dual emission in neat film state. More importantly, the neat film sample of 6HB-Irbt-Cz could display linear ratiometric optical response toward oxygen in the full oxygen concentration range from 0 to 100 vol%, together with good stability, reversibility and rapid response-recovery times. Note that this represents the first discovery of neat-film-based oxygen sensor capable of showing strictly linear ratiometric Stern-Volmer behavior in the oxygen concentration of 0–100 vol%.
Synthesis of isobornylphenol-containing 3-aryl-1,2,4-triazin-5(4H)-ones
Egorov,Chupakhin,Berezin,Rusinov,Rusinov,Buravlev,Chukicheva,Kuchinc
, p. 914 - 918 (2011)
A method for modification of 3-aryl-1,2,4-triazin-5(4H)-ones with isobornylphenols was proposed. The influence of various acylating agents on the reaction pathway was studied.
Useful preparation of 6-phenyl-2,2′-bipyridine ligands bearing di-n-butylaminophenyl or gallate derivatives substituted in the 3- or 4-positions
Diring, Stéphane,Retailleau, Pascal,Ziessel, Raymond
, p. 3027 - 3031 (2007)
A simple protocol for the efficient preparation of substituted 6-phenyl-2,2′-bipyridine derivatives is described. A reverse type of Diels-Alder reaction between a 6-phenyl-2-pyridyl-1,3,4-triazine and 4-N,N-di-n-butylaminophenyl- or gallate-ethynyl derivatives at high temperature provide a mixture of two products easily separable by column chromatography. A variety of ligands suitable for the synthesis of cyclometalated platinum complexes have been produced. Additional substitution of the Pt-Cl by various donor-acceptor ethynyl fragments is feasible by mean of copper(I) catalysis. Georg Thieme Verlag Stuttgart.
A Modular Class of Fluorescent Difluoroboranes: Synthesis, Structure, Optical Properties, Theoretical Calculations and Applications for Biological Imaging
Bachollet, Sylvestre P. J. T.,Volz, Daniel,Fiser, Béla,Münch, Stephan,R?nicke, Franziska,Carrillo, Jokin,Adams, Harry,Schepers, Ute,Gómez-Bengoa, Enrique,Br?se, Stefan,Harrity, Joseph P. A.
, p. 12430 - 12438 (2016)
Ten borylated bipyridines (BOBIPYs) have been synthesized and selected structural modifications have been made that allow useful structure–optical property relationships to be gathered. These systems have been further investigated using DFT calculations and spectroscopic measurements, showing blue to green fluorescence with quantum yields up to 41 %. They allow full mapping of the structure to determine where selected functionalities can be implemented, to tune the optical properties or to incorporate linking groups. The best derivative was thus functionalised with an alkyne linker, which would enable further applications through click chemistry and in this optic, the stability of the fluorophores has been evaluated.
Luminescence comparison of iridium(III) complexes containing symmetric vs. asymmetric quinolinate ligands
Park, Hye Rim,Ha, Yunkyoung
, p. 67 - 74 (2011)
We have focused our research on development of the iridium complexes, especially with respect to blue and red emission for OLED. Previously, we prepared bis-[2,3-bis(4-fluorophenyl)quinoxalinato]iridium(acetylacetonate) [Ir(2,3-dpqx-F2)2/
Novel light-emitting electrophosphorescent copolymers based on carbazole with an Ir complex on the backbone
Zhen, Hongyu,Luo, Jie,Yang, Wei,Chen, Qiliang,Ying, Lei,Jianhua, Zou,Wu, Hongbin,Cao, Yong
, p. 2824 - 2831 (2007)
Novel light-emitting phosphorescent polymers based on 3,6-carbazole with an iridium complex on the backbone were synthesized by Suzuki polycondensation of A-A and B-B type monomers. Three difluoro-substituted phenylpyridine iridium complexes with differen
Highly sensitive iridium(III) complex-based phosphorescent probe for thiophenol detection
Xiong, Li,Yang, Lin,Luo, Shuai,Huang, Yan,Lu, Zhiyun
, p. 13456 - 13462 (2017)
A cyclometalated iridium(iii) complex (Ir-DNBS) was designed and synthesized as a high-performance phosphorescent thiophenol probe. Ir-DNBS displays a distinct phosphorescence off-on response toward thiophenol with high selectivity, high sensitivity (detection limit: 2.5 nM) and fast response (10 min). It is noteworthy that the signaling phosphore of Ir-DNBS possesses relatively high photoluminescence quantum efficiency (ΦPL = 0.21) together with relatively long lifetime (τ = 2.07 μs), indicative of its potential in achieving high temporal resolution. Ir-DNBS is also applicable to the detection of thiophenol in actual water samples with high recovery rate. Photophysical and spectral characterization results revealed that the probing mechanism of Ir-DNBS toward thiophenol lies in the thiolate-mediated cleavage reaction, resulting in suppressed photo-induced excited state electron transfer process in the reaction product.
Multimodal Probes: Superresolution and Transmission Electron Microscopy Imaging of Mitochondria, and Oxygen Mapping of Cells, Using Small-Molecule Ir(III) Luminescent Complexes
Shewring, Jonathan R.,Cankut, Ahmet J.,McKenzie, Luke K.,Crowston, Bethany J.,Botchway, Stanley W.,Weinstein, Julia A.,Edwards, Elizabeth,Ward, Michael D.
, p. 15259 - 15270 (2017)
We describe an Ir(III)-based small-molecule, multimodal probe for use in both light and electron microscopy. The direct correlation of data between light- and electron-microscopy-based imaging to investigate cellular processes at the ultrastructure level
Homoleptic platinum(ii) complexes with pyridyltriazole ligands: Excimer-forming phosphorescent emitters for solution-processed OLEDs
Walden, Melissa T.,Pander, Piotr,Yufit, Dmitry S.,Dias, Fernando B.,Williams, Gareth J.A.
, p. 6592 - 6606 (2019)
Two new homoleptic platinum(ii) complexes are reported that feature aryl-appended 5-(2-pyridyl)-1,2,4-triazole chelates acting as N^N- ligating ions, PtL12 and PtL22. Readily prepared from easily accessible proligands, they offer good solubility in organic solvents, allowing them to be incorporated into OLEDs through solution processing. Crystal structures reveal staggered, face-to-face packing of the π systems in adjacent complexes, but with no close Pt?Pt interactions. The complexes display bright unimolecular phosphorescence: for PtL12 and PtL22 respectively, λmax = 502 and 514 nm; Φ = 0.21 and 0.48; τ = 5.1 and 4.6 μs in deoxygenated CH2Cl2 at 295 K. Both complexes show a strong propensity to form intensely emissive excimers at higher concentrations: λmax = 585 and 625 nm for PtL12 and PtL22. The photophysical properties in doped and neat thin films have been investigated using steady-state and time-resolved methods. These studies highlight the presence of different environments of bimolecular excited states with different lifetimes, those emitting at lowest energy apparently having the longest lifetimes, contrary to what is normally found for unimolecular emitters through the effects of vibrational deactivation. The prototype solution-processed OLEDs gave EQEs of 9.6-12.5% for PtL12 and 8.8-11.4% for PtL22, impressive values for solution-processed devices incorporating such simple complexes and only a little inferior to the EQE of 15% achieved using PtL12 in a device prepared by evaporation. Compounds of this type have potential to provide the red and green components for white light OLEDs, due to their tunable, uni- and bimolecular excited state emission.
Discovery of a potent phenolic N1-benzylidene- pyridinecarboxamidrazone selective against Gram-positive bacteria
Rathbone, Daniel L.,Parker, Katy J.,Coleman, Michael D.,Lambert, Peter A.,Billington, David C.
, p. 879 - 883 (2006)
As part of a study into antimycobacterial compounds a set of phenolic N1-benzylidene-pyridinecarboxamidrazones was prepared and evaluated. This report describes the unexpected discovery of a potent compound with a pronounced selectivity for Gram-positive bacteria over Gram-negative micro-organisms. In addition, this compound is active against various drug-resistant Gram-positive bacteria.
LED can be used for blue light excitation temperature in the cationic iridium (III) complex preparation (by machine translation)
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Paragraph 0014, (2018/03/24)
The invention relates to a novel can be blue light excitation used for preparing warm white light emitting diode (LED) red luminescent material - of cationic organic iridium (III) complex, the material can be with the Y3 Al5 O12 : Ce3 + (YAG: Ce) yellow fluorescent powder mixed doped package, the use of GaN blue light chip (λEm, max =455 nm) excited by warm white light, specific content relates to cationic organic iridium (III) complex synthesis and device preparation, to finally obtain excellent temperature or temperature of the light-emitting efficiency of the light emitting diode. In order to GaN blue light chip as the excitation light source, varied temperature in the increase of the content of illumination material, LED by cold white light changing into a warm white light. With only the use of the YAG: Ce is a light-emitting material compared with the preparation of the LED device, the invention uses YAG: Ce with the red luminescent material mixed doped the preparation of the color temperature of the LED device there can be substantially reduced. The temperature in the light-emitting material of good chemical and thermal stability, high luminous efficiency, easy synthesis and purification, low cost, and simple operation when applied to the LED, and has better application prospect. (by machine translation)
