- Highly Efficient Conformer-Specifif Adiabatic Cis -> Trans Photoisomerization of cis-1-(2-Anthryl)-2-phenylethene in S1
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Emission from cis-1-(2-anthryl)-2-phenylethene, c-APE, in toluene cosists primarily (up to 76percent) of fluorescence from adiabatically formed 1t-APEB*.In this respect, the behavior of c-APE is analogous to that of the na
- Saltiel, Jack,Zhang, Yuxin,Sears, Donald F.
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- Temperature dependence of the photoisomerization of cis-1-(2-antrhyl)-2-phenylethene. Conformer-specificity, torsional energetics and mechanism
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Emission from cis-1-(2-anthryl)-2-phenylethene, c-APE*, in toluene is resolved into 1t-APE(B)* and 1c-APE* components at temperature ranging between 4.3 and 59.3°C. Decomposition of effective fluorescence quantum yields, φ(fc), into
- Saltiel, Jack,Zhang, Yuxin,Sears Jr., Donald F.
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- Asymmetric organic semiconductors for high performance single crystalline field-effect transistors with low activation energy
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Three anthracene derivatives with asymmetric structures, namely 2-phvA, 2-pheA and 2-phA, were synthesised and characterized. Single crystal OFETs of the three compounds were fabricated. 2-pheA and 2-phA showed a mobility of 0.79 cm2 V-1 s-1 and 0.66 cm2 V-1 s-1, while 2-phvA exhibited a high mobility of 10 cm2 V-1 s-1, which was one of the highest mobilities for asymmetric anthracene derivatives. Band-like charge transport with low activation energy was observed in 2-phvA single crystal FET devices at low temperature. These results demonstrated that asymmetry can serve as an alternative strategy to design high-performance organic semiconductors.
- Ai, Shiyun,Dong, Yicai,Geng, Hua,Jiang, Lang,Liu, Jianghong,Liu, Jie,Qiu, Fei,Shi, Xiaosong,Sun, Yanan,Zhang, Hantang,Zhang, Jing,Zhu, Danlei
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supporting information
p. 6006 - 6012
(2020/07/04)
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- Temperature and solvent effects on rotamer-specific photobehaviour of the cis and trans isomers of 2-styrylanthracene
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The photochemical and photophysical behaviour of the two stereoisomers of 2-styrylanthracene (2-StAn) has been investigated as a function of temperature and solvent polarity. The photobehaviour of both the trans and cis isomers markedly depends on the su
- Spalletti, Anna,Bartocci, Giampiero
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p. 5623 - 5632
(2007/10/03)
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- Features of the Quantum Chain Process in the Photochemical One-Way Isomerization of 2-Anthrylethylenes
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Regarding 2-anthrylethylenes which undergo a photochemical cis-to-trans one-way isomerization, their preparative methods are presented.The isomerization of ArCH=CHPh and ArCH=CH(2-naphthyl) (Ar: 2-anthryl) proceeds through a quantum chain process slightly more efficiently than ArCH=CHtBu.The origin of the high efficiency in the quantum chain process of these ethylenes is discussed.
- Karatsu, Takashi,Tsuchiya, Masami,Arai, Tatsuo,Sakuragi, Hirochika,Tokumaru, Katsumi
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p. 3030 - 3039
(2007/10/02)
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- Photoinduced Electron Transfer between Styrylanthracenes and Electron Donors and Acceptors in Acetonitrile
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The decay pathways of the lowest singlet and triplet excited states (1trans* and 3trans*) of trans-n-styrylanthracenes (n-StA, where n = 1, 2 or 9 on the anthracene) have been studied in acetonitrile at room temperature.Fluorescence lifetimes (τF) and quantum yields (ΦF), as well as the yield and spectral and kinetic properties of the lowest triplet state of the three StAs, were determined by steady-state and transient techniques.The formation and the decay of the respective StA radical cations (trans.*) were observed by laser flash photolysis; the yield of photoionization is ca. 0.07 on 353 nm excitation and is enhanced by fluorescence quenching with 1,4-dicyanobenzene.The formation and decay of the StA radical anions (trans-*) in the presence of diethylaniline (DEA) is concluded from transient conductivity (Δκ) and optical results, DEA significantly enhances the yield of trans*- and the initial amplitude of Δκ and correspondingly quenches ΦF.The bimolecular interaction between 1trans* and 4-bromodimethylaniline enhances the triplet population.
- Goerner, Helmut,Elisel, Fausto,Aloisi, Gian Gaetano
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