Metal complexes of the merocyanine form of nitrobenzospyran: Structure, optical spectra, stability

Kubinyi, Miklós; Varga, Olívia; Baranyai, Péter; Kállay, Mihály; Mizsei, Réka; Tárkányi, Gábor; Vidóczy, Tamás

doi:10.1016/j.molstruc.2011.05.055

Cited by 41 publications

(26 citation statements)

References 46 publications

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“…The fluorescence decay times were measured by an Edinburgh Instruments FLS 920 time-resolved spectrofluorimeter, using an EPL-375 semiconductor laser for excitation and a Hamamatsu R3809U-50 MCP-PMT for detection. 24 Few measurements were done by a picosecond single photon counting system (where the excitation wavelength was 296 nm) 19 to inspect the reliability the time resolved data. The timescale of the two setup was cross calibrated by the diluted solution of anthracene in cyclohexane; [25][26] and that lifetime in question proved to be 5.19±0.04 ns.…”

Section: Methodsmentioning

confidence: 99%

First Steps in Photophysics. I. Fluorescence Yield and Radiative Rate Coefficient of 9,10-Bis(phenylethynyl)anthracene in Paraffins

Demeter

2014

J. Phys. Chem. A

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The fluorescence quantum yield of 9,10-bis(phenylethynyl)anthracene (BPEA) is almost unity in every examined solvent. Using different hydrocarbons, one can make a convenient and sufficiently accurate experimental test for determination of the extent of the refractive index correction needed in fluorescence quantum yield determination on a given fluorometer. By comparison of the measurements in n-pentane-cis-decaline or n-hexane-toluene solvent pairs, the requirement of the n(2) correction is confirmed for most of the fluorometers; however, for one of the examined pieces of equipment the necessary correction proved to be slightly lower. By excited state's lifetime measurements, the refractive index dependence of the fluorescence rate coefficient was reexamined. At 25 °C for BPEA the relationship is in agreement with Bakhshiev's prediction: the experimentally determined exponent of n in the rate coefficient deriving equation is around 1.32 using different paraffins as solvents. The negative temperature coefficient of the radiative rate in part originates from the temperature dependence of the refractive index, while also a small intrinsic contribution has been found.

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Section: Methodsmentioning

confidence: 99%

First Steps in Photophysics. I. Fluorescence Yield and Radiative Rate Coefficient of 9,10-Bis(phenylethynyl)anthracene in Paraffins

Demeter

2014

J. Phys. Chem. A

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“…As Au n 2 u n 2 s was used for calculating the quantum yields, in which the indices u and s refer to the sample of the compound (with unknown quantum yield) and the reference fluorophore, F is the area under the fluorescent emission curves, A denotes the absorbance at the wavelength of excitation, n is the refractive index of the solvent [47]. The value of the quantum yields for In1 in DMSO, CH 3 CN, CH 3 OH, and CHCl 3 are 0.189, 0.162, 0.132 and 0.066 (0.102, 0.096, 0.070 and 0.036 for In2), respectively, which strongly depend on solvent properties.…”

Section: Fsmentioning

confidence: 99%

Auxiliary ligand-assisted two novel one-dimensional indium coordination polymers: Synthesis, crystal structures and photoluminescence characterization effected by solvent and temperature

Wang

Fan

Wang

et al. 2015

Inorganic Chemistry Communications

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“…in which subscripts µ and s refer to the sample of the tested compound(with unknown quantum yield) and the reference fluorophore, F is the area under the fluorescent emission curve, A denotes the absorbance at the wavelength of excitation and n is the refractive index of the solvent [50] . The values of the quantum yields for compound 1 in DMSO, CH 3 CN and CH 3 OH are 0.083, 0.029 and 0.18, respectively, which is increased with the increased polarity of the solvents(polarity: DMSO>CH 3 CN>CH 3 OH).…”

Section: Spectral Behavior Of Compound 1 In Different Solventsmentioning

confidence: 99%

Synthesis and crystal structure of 1D Cd-amine coordination polymer and its luminescent properties

Liu

Fan

et al. 2014

Chem. Res. Chin. Univ.

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A novel one dimension(1D) cadmium coordination polymer {[Cd(mpda) 3 ]·2(NO 3 )} n (1) was synthesized via refluxing a mixture of tetradentate Schiff base ligand N,N′-bis(2-pyridinylethylidene)phenylene-1,3-diamine(L) and Cd(NO 3 ) 2 in acetonitrile, whose structure was characterized by means of single crystal X-ray diffraction, FTIR spectroscopy, elemental analysis and proton nuclear magnetic resonance( 1 H NMR). Center metal Cd(II) ion is six-coordinated by six nitrogen atoms from six different m-phenylenediamine(mpda), giving rise to a [CdN 6 ] octahedral coordination environment. The two adjacent cadmium centers are linked by three mpda molecules leading to the construction of 1D chain structure. The crystal structure is stabilized by N-H···O hydrogen bonds to form three-dimension supramolecule. Compound 1 exhibits intense yellow luminescence in solid state at 298 K(λ em =554 nm), which shows a blue shift at 77 K(ca. 147 nm). Additionally, fluorescence characteristics of compound 1 were investigated in different solvents(polarity: DMSO>CH 3 CN>CH 3 OH>CHCl 3 >toluene) at 298 and 77 K. The results show that the emission peak of compound 1 in solvent exhibits a slight bathochromic shift. However, the emission peaks of compound 1 in CH 3 OH and CHCl 3 are red shift compared with that in CH 3 CN. It is revealed that the luminescence behavior of compound 1 depends on not only the polarity of solvent but also the hydrogen bonding properties between solvent and solute. In addition, the emission peak of compound 1 in solution shows a red shift obviously at 77 K than that at 298 K(ca. 144-159 nm), with the fluorescence lifetime increased at 77 K. The lifetime in DMSO at 77 K(τ=12.470 μs) was the longest one. The quantum yield of compoud 1 increases with increasing the polarity of solvent within a range of 1.8%-8.3 %.

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Metal complexes of the merocyanine form of nitrobenzospyran: Structure, optical spectra, stability

Cited by 41 publications

References 46 publications

First Steps in Photophysics. I. Fluorescence Yield and Radiative Rate Coefficient of 9,10-Bis(phenylethynyl)anthracene in Paraffins

First Steps in Photophysics. I. Fluorescence Yield and Radiative Rate Coefficient of 9,10-Bis(phenylethynyl)anthracene in Paraffins

Auxiliary ligand-assisted two novel one-dimensional indium coordination polymers: Synthesis, crystal structures and photoluminescence characterization effected by solvent and temperature

Synthesis and crystal structure of 1D Cd-amine coordination polymer and its luminescent properties

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