Fluorescence and amplified spontaneous emission of glass forming compounds containing styryl-4H-pyran-4-ylidene fragment

Vembris, Aivars; Muzikante, I.; Karpicz, Renata; Sliaužys, Gytis; Miasojedovas, Arūnas; Juršėnas, Saulius; Gulbinas, Vidmantas

doi:10.1016/j.jlumin.2012.03.063

Cited by 21 publications

(18 citation statements)

References 27 publications

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“…Variations in the peak intensity of ASE spectra as a function of the pump beam pulse energy are shown in Fig.28, from which ASE threshold values are estimated to be 90±10, 330±20, 95±10, 225±20 μJ/cm 2 for DWK-1, DWK-2, JWK-1 and ZWK-1, respectively. These values are larger in comparison with the threshold values (of the order of micro joules per square centimeter) reported for some other materials [46,47].…”

Section: Dwk-1 Zwk-1 Dwk-2 Jwk-1contrasting

confidence: 65%

“…In order to test the light amplification prospects of our synthesized compounds, we prepared pure thin films of all the compounds on a quartz substrate and measured their amplified spontaneous emission (ASE). Such emission was observed only for four of six compounds, DWK-1, DWK-2, JWK-1 and ZWK-1, as shown in Fig.27 [46]. …”

Section: Amplified Spontaneous Emission Propertiesmentioning

confidence: 89%

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Synthesis and Physical Properties of Red Luminescent Glass Forming Pyranylidene and Isophorene Fragment Containing Derivatives

Zariņš¹,

Vembris²,

Kokars³

et al. 2012

Organic Light Emitting Devices

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Section: Dwk-1 Zwk-1 Dwk-2 Jwk-1contrasting

confidence: 65%

Section: Amplified Spontaneous Emission Propertiesmentioning

confidence: 89%

Synthesis and Physical Properties of Red Luminescent Glass Forming Pyranylidene and Isophorene Fragment Containing Derivatives

Zariņš¹,

Vembris²,

Kokars³

et al. 2012

Organic Light Emitting Devices

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“…Previously we have studied pyranylidene derivatives which form amorphous thin films from solution and exhibit amplified spontaneous emission even in neat thin films. 12 In this work photoluminescence and amplified spontaneous emission of two DCM derivatives with attached bulky trityloxyethyl groups in poly(methyl methacrylate) (PMMA) at the concentration 0.1, 1, 3, 5, 10 wt% were investigated. The same concentration samples were prepared with DCM molecules for comparison.…”

Section: Introductionmentioning

confidence: 99%

Amplified spontaneous emission of glass forming DCM derivatives in PMMA films

2014

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4-(dicyanomethylene)-2-methyl-6-(p-dimethylaminostyryl)-4H-pyran (DCM) is well known red laser dye which can be used also in solid state organic lasers. The lowest threshold value of amplified spontaneous emission was achieved by doping 2wt% of DCM molecule in tris-(8-hydroxy quinoline) aluminium (Alq 3 ) matrix. Further increase of dye concentration also increases threshold value. It is due to large intermolecular interaction which reduce photoluminescence quantum yield. Compounds with small intermolecular interaction and which exhibit similar amplified spontaneous properties as DCM could be useful for solid state organic lasers.In the work photoluminescence and amplified spontaneous emission properties of two DCM derivatives in poly(methyl methacrylate) (PMMA) matrix were investigated. Bulky trityloxyethyl groups are attached to the donor part of investigated molecules. These groups reduce intermolecular distance wherewith reduce photoluminescence quenching. More than one order of magnitude lower excitation threshold energy of the amplified spontaneous emission was achieved in doped polymer films with investigated compound in comparison to doped polymer with DCM. It means that the investigated compound is more perspective as a laser material compared to previously study.

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“…In our previous researches 3- 6 we have shown that incorporated bulky triphenyl-groups in the structures of such organic molecules give them the ability to form thin amorphous solid films from volatile non-polar organic solvents. So far we have synthesized and investigated derivates of 6-methyl-2-styryl-4-pyran-4-ylidene 3,6 , 6-tert-butyl-2-styryl-4-pyran-4-ylidene 4,7 and symmetric 2,6-bis-styryl-4-pyran-4-ylidene 5 .…”

Section: Introductionmentioning

confidence: 99%

“…So far we have synthesized and investigated derivates of 6-methyl-2-styryl-4-pyran-4-ylidene 3,6 , 6-tert-butyl-2-styryl-4-pyran-4-ylidene 4,7 and symmetric 2,6-bis-styryl-4-pyran-4-ylidene 5 . Their photoluminescence spectrum in the solid state is in range from 600 to 800 nm and their glass transition temperature is in range from 100 o C to 160 o C [3][4][5][6][7] . Unfortunately, there were still not enough experimental results to understand the relation between compound organic structures and their thermal and optical properties.…”

Section: Introductionmentioning

confidence: 99%

Thermal and optical properties of 4H-pyran-4-ylidene fragment and bis-styryl and triphenyl groups containing derivatives

et al. 2014

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Small D-π-A type organic molecules with incorporated 4H-pyan-4-ylidene (pyranylidene) fragment in their structures show potential in organic photonics -such as materials for organic light emitting diode application studies and organic solid state lasers. Additional incorporation of bulky triphenyl-groups in their structures gives them the ability to form thin amorphous solid films from volatile non-polar organic solvents. Unfortunately, there is still no clear relation between compound organic structures and their thermal and optical properties. In order to investigate the above mentioned regularities we have synthesized a series of tripheyl-group containing derivates of 2,6-bis-styryl-4H-pyran-4-ylidene with different stryryl-substituents and investigated their physical properties. The thermal decomposition temperatures of the obtained glassy 4H-pyran-4-ylidene compounds are in range from 198 o to 312 o C and depend from electron acceptor and styryl-groups while their glass transition temperatures are in range from 104 o to 132 o C and are mostly influenced by the electron acceptor fragment. The light absorption of synthesized 4H-pyran-4-ylidene compounds in solutions of dichloromethane as well as in their solid state are in range from 400 nm to 550 nm. Their photoluminescence spectra in the solid state (from 600 nm to 800 nm) are red-shifted by approximately 50 nm comparing to their photoluminescence spectra in solutions of dichloromethane (from 550 nm to 750 nm) and mostly depends on the N,N-ditrityloxyethyl-aminostyryl-electron donor substituent, 4H-pyran-4-ylidene π-system and on the electron-acceptor group. Synthesized compounds could be used as potential materials for light amplification.

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Fluorescence and amplified spontaneous emission of glass forming compounds containing styryl-4H-pyran-4-ylidene fragment

Cited by 21 publications

References 27 publications

Synthesis and Physical Properties of Red Luminescent Glass Forming Pyranylidene and Isophorene Fragment Containing Derivatives

Synthesis and Physical Properties of Red Luminescent Glass Forming Pyranylidene and Isophorene Fragment Containing Derivatives

Amplified spontaneous emission of glass forming DCM derivatives in PMMA films

Thermal and optical properties of 4H-pyran-4-ylidene fragment and bis-styryl and triphenyl groups containing derivatives

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