- Rigid molecular architectures that comprise a 1,3,5-trisubstituted benzene core and three oligoaryleneethynylene arms: Light-emitting characteristics and π conjugation between the arms
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In view of increasing interest in light-emitting materials, we have investigated the light-emitting characteristics and occurrence of conjugation between arms of star-shaped rigid molecules that comprise a 1,3,5-triethynylbenzene core and methoxy group-su
- Yamaguchi, Yoshihiro,Ochi, Takanori,Miyamura, Satoshi,Tanaka, Takahiro,Kobayashi, Shigeya,Wakamiya, Tateaki,Matsubara, Yoshio,Yoshida, Zen-Ichi
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p. 4504 - 4505
(2007/10/03)
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- New Trigonal Lattice Hosts: Stoicheiometric Crystal Inclusions of Laterally Trisubstituted Benzenes - X-Ray Crystal Structure of 1,3,5-Tris-(4-carboxyphenyl)benzene*Dimethylformamide
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New host molecules with a central 1,3,5-trisubstituted benzene ring and rigidly attached lateral arms composed of aryl or arylethynyl and extra fuctional groups are reported.They are shown to give more than thirty clathrates with a wide variety of organic solvents comprising alicyclic, aromatic, heterocyclic, dipolar aprotic, and protic molecules.Inclusion selectivities and stoicheiometries of the different clathrates are discussed.The crystal structure of (2a)*dimethylformamide (DMF) (1:3) inclusion compound has been determined from single-crystal X-ray diffraction.The crystals show R3 symmetry.There are six host and eighteen guest molecules in the hexagonal unit cell with a=b=23.160(9) and c=11.812(3) Angstroem.The final linear R is 0.082 for 1518 unique reflections.The host molecule adopts a propeller conformation with perfect three-fold symmetry and acts as a donor in hydrogen bonds to three DMF molecules.In the crystal structure the host-guest units are arranged stack-wise.
- Weber, Edwin,Hecker, Manfred,Koepp, Erich,Orlia, Wolfgang,Czugler, Matyas,Csoeregh, Ingeborg
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p. 1251 - 1258
(2007/10/02)
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