Influence of fluorescer concentration on peroxyoxalate chemiluminescence spectra

Li, Bin; Miao, Weirong; Cheng, Liang

doi:10.1016/s0143-7208(00)00040-1

Cited by 11 publications

(7 citation statements)

References 8 publications

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“…The anthracene core disrupts the rodlike molecular profile with respect to analogous tolanes for which nematic and smectic phases have been found. 6c, For this work compound 1a with two ethoxy substituents was prepared and it melts directly to isotropic liquid. Other derivatives with small substituents such as R = R‘ = Me, OMe, SMe, N(Me) 2 , N(Et) 2 , CF 3 , CN, NO 2 , Cl and R = OMe, R‘ = NO 2 , have been previously described and no mesomorphism has been reported. 8d, An increase of the length of the molecule with a long chain substituent like decyloxycarbonyl (compound 1b ) leads to the induction of a monotropic nematic phase as well as to a significant decrease of the melting point. Moreover, on cooling, this compound was obtained as a mixture of two crystalline forms that melt directly to the isotropic liquid at different temperatures and are visible by eye because of their different colors (yellow and red-orange, with the red form of higher melting point than the yellow).…”

Section: Resultsmentioning

confidence: 96%

Luminescent Liquid Crystals Derived from 9,10-Bis(Phenylethynyl)anthracene

2004

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Liquid crystalline behavior has been found in a series of low-molecular-weight 9,10disubstituted anthracenes. In particular, nematic mesomorphism is displayed by derivatives bearing at least a 4′-pentylbiphenyl-4-ylethynyl group, showing that the presence of this substituent induces a mesophase despite the broad central core of the anthracene skeleton. These compounds can also be seen as derived from the known fluorescent material 9,10bis(phenylethynyl)anthracene (BPEA) with a p-pentylphenyl substituent (among others) along its long axis. A comparison of the optical properties of the compounds relative to the parent compound BPEA is presented in order to evaluate their applications in emissive devices. A study of a nematic compound in solution, PMMA film, and pure state in the different phases shows high fluorescence in solution in the green region that slightly shifts to higher wavelengths in PMMA films, but it is clearly red-shifted in pure state.

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Section: Resultsmentioning

confidence: 96%

Luminescent Liquid Crystals Derived from 9,10-Bis(Phenylethynyl)anthracene

2004

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“…Accordingly, BPEA has been widely used as a molecular probe in various spectroscopic studies, [1][2][3][4][5][6][7] and its photophysical properties have been studied by a number of spectroscopic methods. [8][9][10][11][12] BPEA and its derivatives have been recently demonstrated to possess attractive optical and electronic properties, thereby making them promising candidates for a wide variety of optoelectronic and photonic applications such as lightemitting diodes, 13 photoswitches, 14 chemiluminescent light sources, 15 optical waveguides, 16 and solar cells. 17 Moreover, bis(arylethynyl)arene compounds have recently received considerable attention as molecular wires.…”

Section: Introductionmentioning

confidence: 99%

Photophysics and photostability of 9,10-bis(phenylethynyl)anthracene revealed by single-molecule spectroscopy

et al. 2012

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The photophysics and photostability of 9,10-bis(phenylethynyl)anthracene (BPEA) diluted in a 40-nm-thick Zeonex polymer film have been investigated by single-molecule spectroscopy (SMS). The single-molecule detection of BPEA was verified by recording fluorescence intensity trajectories, fluorescence lifetimes, and fluorescence spectra. The intensity trajectories showed frequent on/off blinking and one-step photobleaching behaviors. The observed blinking was attributed to the temporary occupation of the excited triplet state T 1 via intersystem crossing (ISC). Assuming a threestate model (e.g., S 0 , S 1 , and T 1 ), the distributions of triplet lifetime and S 1 AT 1 ISC quantum yield of BPEA were both derived from the analyses of the blinking statistics and the intensity autocorrelation. We found extremely low ISC yields (on the order of 10 25 -10 24 ), which were theoretically rationalized by the large energy gap between 3 B 2u and S 1 ( 1 B 1u )/T 1 ( 3 B 1u ) states. SMS measurements were also conducted under both air and Ar atmospheres in order to gain insight into the influence of oxygen on photobleaching. The results reveal that, although the presence of oxygen considerably degraded the photostability of BPEA, under deoxygenated conditions, BPEA delivers more than 10 7 photons before photobleaching and possesses an appreciably low photobleaching yield of 10 29 -10 28 . This study shows that BPEA has a relatively high degree of photostability at room temperature and can serve as a useful green fluorescent probe for SMS studies.

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“…Polycyclic π-conjugated aromatics such as naphthalene, anthracene, pyrene, and their derivatives are widely researched as photoelectrically functional materials. For example, 9,10-bis(phenylethynyl)anthracene emits green light, − and the derived compounds serve as “molecular wires” based on the rigid rodlike structures exhibiting electron conductivity. − Thus, 9,10-bis(phenylethynyl)anthracene derivatives featuring optoelectronic and photonic functions are applicable to light-emitting diodes, photoswitches, chemiluminescent light sources, optical waveguides, and solar cells …”

Section: Introductionmentioning

confidence: 99%

“…For example, 9,10-bis(phenylethynyl)anthracene emits green light, 20−22 and the derived compounds serve as "molecular wires" based on the rigid rodlike structures exhibiting electron conductivity. 23−25 Thus, 9,10-bis-(phenylethynyl)anthracene derivatives featuring optoelectronic and photonic functions are applicable to light-emitting diodes, 26 photoswitches, 21 chemiluminescent light sources, 27 optical waveguides, 28 and solar cells. 29 There have been several reports of benzoxazines tethered to π-conjugated molecules and polymers.…”

Section: ■ Introductionmentioning

confidence: 99%

Synthesis and Cross-Linking of a Benzoxazine-Containing Anthracene Moiety: Thermally Stable Photoluminescent Benzoxazine Resin

et al. 2020

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A novel benzoxazine derivative, 9,10-bis(6-ethynyl-3-phenyl-3,4-dihydro-1,3-benzoxazine)anthracene (1a), was synthesized by the Sonogashira–Hagihara coupling reaction of 9,10-dibromoanthracene and 6-ethynyl-3-phenyl-3,4-dihydro-1,3-benzoxazine. A CH2Cl2 solution of 1a luminesced with a high quantum yield (Φ = 81%). Compound 1a afforded solvent-insoluble cross-linked polybenzoxazine 1b by the bulk polymerization at 250 °C. Solution polymerization of a dilute solution of 1a at 200 °C afforded solvent-soluble samples, accompanied by a decrease of photoluminescence intensity. The weight loss values of 1a and 1b were 81 and 87%, respectively, under nitrogen at 500 °C. We believe that the present study will lead to thermally stable curing resins whose degree of curing can be estimated with the naked eye by observing the decrease of photoluminescence.

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Influence of fluorescer concentration on peroxyoxalate chemiluminescence spectra

Cited by 11 publications

References 8 publications

Luminescent Liquid Crystals Derived from 9,10-Bis(Phenylethynyl)anthracene

Luminescent Liquid Crystals Derived from 9,10-Bis(Phenylethynyl)anthracene

Photophysics and photostability of 9,10-bis(phenylethynyl)anthracene revealed by single-molecule spectroscopy

Synthesis and Cross-Linking of a Benzoxazine-Containing Anthracene Moiety: Thermally Stable Photoluminescent Benzoxazine Resin

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