نتایج جستجو برای: phosphorescence

تعداد نتایج: 1605  

Journal: :Chemical communications 2015
Yuanpeng Fan Duanchen Ding Dahui Zhao

A series of triscyclometalated iridium complexes with oligofluorene-substituted ppy ligands manifest impressive two- and three-photon absorption properties. In particular, a star-shaped complex bearing three carbazole-terminated trifluorenyl ppy demonstrates a large three-photon absorption cross section up to 81 × 10(-78) cm(6) s(2) photon(-2). In combination with optimal phosphorescence quantu...

Journal: :Molecules 2016
Yi-Ting Lee Yung-Ting Chang Cheng-Lung Wu Jan Golder Chin-Ti Chen Chao-Tsen Chen

We have overcome the synthetic difficulty of 9,9',9'',9''',9'''',9'''''-((phenylsilanetriyl)tris(benzene-5,3,1-triyl))hexakis(9H-carbazole) (SimCP3) an advanced homologue of previously known SimCP2 as a solution-processed, high triplet gap energy host material for a blue phosphorescence dopant. A series of organic light-emitting diodes based on blue phosphorescence dopant iridium (III) bis(4,6-...

Journal: :The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science 1898

2016
Xiaogang Yang Dongpeng Yan

Luminescent metal–organic frameworks (MOFs) have received much attention due to their wide structural tunability and potential application in light-emitting diodes, biological imaging and chemical sensors. However, successful examples of long-persistent afterglow MOFs are still quite limited to date. In this work, we report that two types of Zn-terephthalate (TPA) MOFs (namely [Zn(TPA)(DMF)] (1...

Journal: :Brazilian journal of medical and biological research = Revista brasileira de pesquisas medicas e biologicas 2001
L N Torres I P Torres Filho

We have developed a system with two epi-illumination sources, a DC-regulated lamp for transillumination and mechanical switches for rapid shift of illumination and detection of defined areas (250-750 microm(2)) by fluorescence and phosphorescence videomicroscopy. The system permits investigation of standard microvascular parameters, vascular permeability as well as intra- and extravascular PO2 ...

Journal: :Physical chemistry chemical physics : PCCP 2014
Yang-Jin Cho Kyung-Ryang Wee Ho-Jin Son Dae Won Cho Sang Ook Kang

The increase in phosphorescence efficiency was estimated by the energy transfer mechanism for divergent iridium dendrimers with peripheral phenylcarbazole units. A series of Ir-core/phenylcarbazole-end dendrons of the type, Ir(dfppy)2(pic-Czn) (Gn, n = 0, 1, 2, and 3), was synthesized, where dfppy, pic, and Czn (n = 2, 4, and 8) are 2-(4,6-difluorophenyl)pyridine, picolinate substituted with Cz...

Journal: :Laser & Photonics Reviews 2021

In article number 2000474, Yan-Qing Li, Jian-Xin Tang, and co-workers review the recent developments for constructing single-emissive-layer white organic light-emitting diodes (SEL-WOLEDs). The strategies focus on molecular design methods of single-molecule devices, energy transfer mechanisms in various multiple-molecule devices with all-fluorescence, all-phosphorescence, fluorescence-phosphore...

Journal: :Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology 2011
Yaroslav Prostota Paulo Jorge Coelho João Pina João Seixas de Melo

A new set of photochromic hindered benzo- and naphtho[1,3]oxazines with fast switching speed between the closed and open form were synthesised. Laser excitation of these uncoloured molecules (with ∼10 ns FWHM pulses) leads to the cleavage of the C-O bond and opening of the oxazine ring in less than 20 ns, generating a thermally unstable coloured zwitterionic species that reverts in few nanoseco...

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