Optical spectroscopy of C60 complexes

Konarev, Dmitri V.; Lyubovskaya, R.N.; Drichko, Natalia; Semkin, V. N.; Graja, A.

doi:10.1016/s0379-6779(98)00361-0

Cited by 16 publications

(12 citation statements)

References 18 publications

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“…On the other hand, the electronegative nature of C 60 , acting via the abnormally large exterior p lobe of each carbon [16], may also stimulate the assembly of C 60 molecules through the overlap of p orbit, since sharing electrons with congeneric elements is much easier than with solvent. Hence, in response to a lower cohesive energy (1.6 eV) per C 60 in face-center-cubic solid [17] than charge transfer band (1.98 eV) for solid complex [18], the generation of C 60 nanoparticles in toluene would be more reasonably ascribed to its own catachrestic geometry and electronic structure.…”

Section: Resultsmentioning

confidence: 99%

Solvent-induced optical properties of C60

Zhang

2010

Journal of Luminescence

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Section: Resultsmentioning

confidence: 99%

Solvent-induced optical properties of C60

Zhang

2010

Journal of Luminescence

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“…It seems that such pulses may follow randomly, which complicates their detection; nonetheless, they can be recorded under certain conditions using a streak camera in a regime of one-off counting [8]. The fact that allotropic forms of carbon formed on new layers of the composite are compounds that are strongly polarisable is not in doubt [9,10]. It remains unclear (1) by what means processes of the generation and recombination of non-equilibrium charge carriers can occur in the composite investigated, and (2) whether the density of the electron-hole pairs in the material is suffi cient for the emergence of Dicke superradiation.…”

Section: Results and Their Discussionmentioning

confidence: 99%

Carbon-Black-Filled Polystyrene as An Integral Nanocircuit. Part 2. Semiconductor Heterostructure and Possibilities of Achieving a Light-Diode Function with Carbon-Black-Filled Polystyrene: Part 1 – See Plast. Massy, No. 3, 2006

Akhmedov

2007

International Polymer Science and Technology

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“…[45][46][47][48][49][50][51][52] The dispersing ability of the F-PEs was evaluated using C 60 as a model filler material. Namely, absorption change of F-PEs (3:00 Â 10 À3 M vs. unit structure) by the addition of C 60 (10 mL; 3:00 Â 10 À4 M) in CHCl 3 was observed as decrease of the absorption intensity at 440-650 nm region according to the Armaroli's report.…”

Section: Dispersing Ability For Fullerene C 60mentioning

confidence: 99%

9,9-Diarylfluorene-Based Poly(alkyl aryl ether)s: Synthesis and Property

et al. 2009

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Polyethers possessing 9,9-diarylfluorene moieties in the main chain (F-PEs 3) were synthesized in 85-99% yields by the polycondensation of 9,9-bis(hydroxyaryl)fluorenes with alkyl ditosylates in the presence of cesium carbonate. Molecular weight of the F-PEs was dependent on the structure of the ditosylate 1; cyclohexyl-1,4-dimethylene (1a), 1,2-ethylene (1b), 1,3-trimethylene (1c), and 1,6-hexamethylene (1d). Higher molecular weight F-PEs (M n 32000-60000, M w 74000-160000) was obtained when longer alkyl chain ditosylates (1a and 1d) were used. The F-PEs showed good solubility toward various organic solvents such as toluene and high 5% weight loss temperature (T d5 : 424-447 C). The glass transition temperature of F-PEs (T g ) was ranging from 147 to 220 C. No melting point (T m ) was observed. F-PEs showed high water-resistance. The transmittance of F-PEs in film state (thickness: 21-32 mm) reached over 90% in the visible region. The F-PEs exhibited high refractive indices in a range of 1.62-1.66 at 590 nm in addition to sufficiently low birefringence values, probably due to the cardo structure of the fluorene moiety placed in the main chain. The structural dependence of dispersing ability to fullerene C 60 was investigated.KEY WORDS: Cardo Structure / Polyether / Refractive Index / Birefringence / Solubility / Thermal Stability / Processability / 9,9-Diarylfluorene-based polymers attract much attention due to the unique characteristics originated from the ''cardo'' structure as characterized often by the high refractive index and low birefringence.1-9 Such optical property is caused by the presence of many aromatic rings in the 9,9-diarylfluorene moiety which occupy the different planes to disturb the interchromophore packing, effectively decreasing the optical anisotropy. Meanwhile, such polymers also display excellent filler-dispersing ability [10][11][12] in addition to their high thermal stability, [13][14][15][16] high solubility, [17][18][19] and so on. [20][21][22][23][24][25] We have recently reported the special -interaction of the 9,9-diarylfluorene moiety in the matrix polymers toward -face of the carbon fillers.26 Although many polymers possessing 9,9-diarylfluorene moieties in the main chain have been developed to date, there is no study on polyethers. Polyethers are an important class of high performance engineering thermoplastics with a favorable combination of physical, mechanical, and chemical properties, other than processability, [31][32][33][34][35][36][37][38][39][40][41] and are easily synthesized usually by the polycondensation of diols and ditopic electrophiles. Polyethers with good optical and physical properties can be obtained, 42,43 if saturated alkyl group is introduced into the polymer main chain in addition to 9,9-diarylfluorene moiety, because the alkyl group often shows no optical anisotropy.Herein, we wish to disclose the synthesis and property of poly(alkyl aryl ether)s (F-PEs) containing 9,9-diarylfluorene moiety in the main chain, with emphasis on the effect of alkyl chai...

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Optical spectroscopy of C60 complexes

Cited by 16 publications

References 18 publications

Solvent-induced optical properties of C60

Solvent-induced optical properties of C60

Carbon-Black-Filled Polystyrene as An Integral Nanocircuit. Part 2. Semiconductor Heterostructure and Possibilities of Achieving a Light-Diode Function with Carbon-Black-Filled Polystyrene: Part 1 – See Plast. Massy, No. 3, 2006

9,9-Diarylfluorene-Based Poly(alkyl aryl ether)s: Synthesis and Property

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