Singlet Oxygen Generation in Peripherally Modified Platinum and Palladium Porphyrins: Effect of Triplet Excited State Lifetimes and meso-Substituents on 1 O2 Quantum Yields.
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DOI: 10.1002/cplu.202200010
Abstract: A series of meso-substituted with aromatic (=tolyl, pyrenyl, fluorenyl, naphthyl, and triphenylamine) substituents, platinum (Pt), and palladium (Pd) porphyrins have been synthesized and characterized by spectroscopic and single-crystal X-ray diffraction studies to probe structure-reactivity aspects… read more here.
Keywords: platinum palladium; quantum yields; singlet oxygen; meso substituents ... See more keywords
Synthesis of soluble poly(azomethine)s containing thiophene and their fluorescence quantum yields
Sign Up to like & getrecommendations! Published in 2019 at "Polymer Bulletin"
DOI: 10.1007/s00289-019-02911-y
Abstract: In this study, poly(azomethine)s containing thiophene unit and with pyridine, oxygen and sulfur bridges are synthesized via the condensation reaction at the organic medium. The obtained compounds were structurally clarified by Fourier-transform infrared, ultraviolet–visible and… read more here.
Keywords: containing thiophene; azomethine containing; quantum yields; spectroscopy ... See more keywords
Distinctive effects on fluorescence quantum yields of 4-substituted N-methylphthalimides by inclusion complexation with β-cyclodextrins
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Inclusion Phenomena and Macrocyclic Chemistry"
DOI: 10.1007/s10847-018-00877-4
Abstract: The inclusion constants K for the complexation of 4-substituted N-methylphthalimides with β-cyclodextrins [β-CD and 2,6-di-O-methylated β-CD (DM-β-CD)] were determined from the fluorescence spectra that were enhanced by the inclusion. The structures of the 1:1 inclusion… read more here.
Keywords: substituted methylphthalimides; fluorescence quantum; inclusion; quantum yields ... See more keywords
Singlet oxygen quantum yields determined by oxygen consumption
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Photochemistry and Photobiology A: Chemistry"
DOI: 10.1016/j.jphotochem.2019.04.029
Abstract: Abstract Quantifying singlet oxygen production from triplet photosensitizers typically requires spectroscopic techniques and specialty chemical traps. Herein we describe a novel method for determining the singlet oxygen quantum yield (фΔ) of photosensitizers. The method utilizes… read more here.
Keywords: singlet oxygen; consumption; quantum yields; oxygen quantum ... See more keywords
Theoretical investigation on the phosphorescence quantum yields of cyclometalated (C∧N*) Pt(II) (acac) complexes: The impact of the position of the BMes2 moiety on the radiative and nonradiative decay processes
Sign Up to like & getrecommendations! Published in 2017 at "Organic Electronics"
DOI: 10.1016/j.orgel.2017.09.004
Abstract: Abstract The radiative and non-radiative decay processes of four cyclometalated (C ∧ N*)Pt(II)(acac) complexes were investigated by using the density functional theory/time dependent density functional theory (DFT/TD-DFT) approach. In order to explore the influence of… read more here.
Keywords: cyclometalated acac; decay; radiative decay; non radiative ... See more keywords
Versatile Approach for Reliable Determination of Both High and Low Values of Luminescence Quantum Yields.
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DOI: 10.1021/acs.analchem.8b02751
Abstract: The determination of luminescence quantum yields by means of relative methods requires setting identical experimental conditions for both sample and reference compounds. This requirement has a critical impact on the applicability of these protocols, as… read more here.
Keywords: luminescence quantum; determination; quantum yields; approach ... See more keywords
Tunable from Blue to Red Emissive Composites and Solids of Silver Diphosphane Systems with Higher Quantum Yields than the Diphosphane Ligands.
Sign Up to like & getrecommendations! Published in 2020 at "Inorganic chemistry"
DOI: 10.1021/acs.inorgchem.0c02238
Abstract: PMMA composites and solids of complexes of formulas [AgX(P-P)]n [n = 1 and 2; X = Cl, NO3, ClO4, CF3COO, and OTf; P-P = dppb, xantphos, (PR2)2C2B10H10 (R = Ph and iPr)] display the whole… read more here.
Keywords: yields diphosphane; diphosphane ligands; higher quantum; quantum yields ... See more keywords
Enhancing the Luminescence of Eu(III) Complexes with the Ruthenocene Organometallic Unit as Ancillary Ligand.
Sign Up to like & getrecommendations! Published in 2022 at "Inorganic chemistry"
DOI: 10.1021/acs.inorgchem.2c02115
Abstract: Five novel Eu(III)-β-diketonate complexes containing ruthenocene ancillary ligands (1,1'-bis(diphenylphosphoryl)ruthenocene─RcBPO) were synthesized and characterized. The coordination compounds presented the general formula [Eu(β-dik)3(RcBPO)], where β-dik stands for 2-thenoyltrifluoroacetonate (tta), 3-benzoyl-1,1,1-trifluoroacetone (btf), 2-dibenzoylmethanate (dbm), 2-acetyl-1,3-indandionate (aind), and 2-benzoyl-1,3-indandionate… read more here.
Keywords: rcbpo; quantum yields; iii; ancillary ligand ... See more keywords
Cyclometalated Spirobifluorene Imidazolylidene Platinum(II) Complexes with Predominant 3LC Emissive Character and High Photoluminescence Quantum Yields.
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DOI: 10.1021/acs.inorgchem.2c02141
Abstract: Two novel bidentate C^C*spiro cyclometalated platinum(II) complexes comprising a spiro-conjugated bifluorene ligand and different β-diketonate auxiliary ligands are synthesized and characterized. Their preparation employs a robust and elaborate synthetic protocol commencing with an N-heterocyclic carbene… read more here.
Keywords: platinum complexes; cyclometalated spirobifluorene; spirobifluorene imidazolylidene; quantum yields ... See more keywords
Fluorescence Quantum Yields in Complex Environments from QM-MM TDDFT Simulations: The Case of Indole in Different Solvents.
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Physical Chemistry A"
DOI: 10.1021/acs.jpca.0c06631
Abstract: Fluorescence is commonly exploited to probe microscopic properties. An important example is tryptophan in protein environments, where variations in fluorescence quantum yield, and in absorption and emission maxima, are used as indicators of changes in… read more here.
Keywords: fluorescence quantum; fluorescence; quantum yields; complex environments ... See more keywords
Green and Orange Emissive Carbon Dots with High Quantum Yields Dispersed in Matrices for Phosphor-Based White LEDs
Sign Up to like & getrecommendations! Published in 2020 at "ACS Sustainable Chemistry & Engineering"
DOI: 10.1021/acssuschemeng.9b06008
Abstract: Carbon dots (CDs) have aroused more interest in the LED phosphor. High quantum yields and suppressing solid-state luminescence quenching are the key factors for CDs to prepare high-quality phosphor... read more here.
Keywords: quantum yields; carbon dots; high quantum; phosphor ... See more keywords