- Pyrazine-incorporating panchromatic sensitizers for dye sensitized solar cells under one sun and dim light
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New D-A′-π-A type (D = electron donor, A′ = auxiliary acceptor, π = π-conjugated bridge, and A = electron acceptor/anchor) sensitizers with two bis(alkoxy)phenyl substituents incorporating thieno[3,4-b]pyrazines (TP) or a benzo[3,4-b]pyrazine (BP) entity
- Desta, Mulu Berhe,Vinh, Nguyn S?n,Pavan Kumar, CH.,Chaurasia, Sumit,Wu, Wei-Ti,Lin, Jiann T.,Wei, Tzu-Chien,Wei-Guang Diau, Eric
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- Dibenzo[a,c]phenazine with six-long alkoxy chains to probe optimization of mesogenic behavior
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New hexaalkoxydibenzo[a,c]phenazines (HDBPs) with six-carbon long chains have been prepared, and their mesogenic behavior investigated. The incorporation of six peripheral alkoxy groups onto the larger, dipolar core bearing nitrogen atoms showed interesti
- Ong, Chi Wi,Hwang, Ja-Yi,Tzeng, Mei-Chun,Liao, Su-Chih,Hsu, Hsiu-Fu,Chang, Tsu-Hsin
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p. 1785 - 1790
(2008/09/21)
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- Synthesis of unsymmetrical dibenzoquinoxaline discotic mesogens
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Unsymmetrical dibenzophenazine discotic mesogens were prepared via the corresponding tetraalkoxybenzfl derivatives. These dibenzophenazines exhibit Colho phases over extremely broad temperature ranges.
- Foster, E. Johan,Babuin, Jarret,Nguyen, Natalie,Williams, Vance E.
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p. 2052 - 2053
(2007/10/03)
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- Synthesis of Alkyl- and Alkoxy-Substituted Benzils and Oxidative Coupling to Tetraalkoxyphenanthrene-9,10-diones
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Intermolecular Friedel-Crafts acylation of various substituted alkyl- or alkoxybenzenes with oxalyl chloride using carbon disulfide as solvent gave rise to the benzils 1a-k.Subsequent intramolecular oxidative coupling with either thallium(III) oxide/trifluoroacetic acid or vanadium(V) oxyfluoride/boron trifluoride diethyl etherate resulted in the corresponding phenanthrene-9,10-diones 2a-d.It has been shown that oxygen functionalities at the 3,3',4, and 4'positions are necessary for coupling to occur.These substituted benzils and phenanthrene-9,10-diones constitute precursors for ligands in the field of discotic metallomesogens or polymeric mesogens.
- Mohr, Bernhard,Enkelmann, Volker,Wegner, Gerhard
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p. 635 - 638
(2007/10/02)
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