Search results for "PHENYLENE"

showing 10 items of 457 documents

1992

The synthesis of a new type of combined polymers containing both disc- and rod-like mesogens is reported. The polyesters, having a triphenylene derivative as a discotic mesogen in the side group and azobenzene or biphenyl derivatives as rod-like mesogens in the main chain were characterized by polarizing microscopy, differential scanning calorimetry, and X-ray scattering studies. The homopolymer 7 is highly crystalline, while the copolymer 8 is amorphous, both, however, do not form liquid-crystalline phases.

Polyesterchemistry.chemical_compoundCondensation polymerMaterials sciencechemistryAzobenzeneMesogenDiscotic liquid crystalPolymer chemistrySide chainTriphenylenesense organsPendant groupDie Makromolekulare Chemie
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Die vielfältigen additionsprodukte von phenylen-, naphthylen-, biphenylylen- und methylendiphenylendimethacrylaten mit radikalen aus 2,2'-azoisobutyr…

1976

Die Reaktionen von Phenylen-, Naphthylen-, Biphenylylen- und Methylendiphenylendimethacrylaten (1–4) wurden teils mit 2,2'-Azoisobutyronitril (AIBN) in Substanz oder anionisch in Losung mit Butyllithium oder Natriumdihydronaphthylid (Naphthalinnatrium), teils mit grosem Uberschus an AIBN stark verdunnt in siedendem Benzol durchgefuhrt. Neben unloslichen (vernetzten) Polymeren wurden losliche erhalten, darunter Cyclopolymere vom Typ 9, wie die Ergebnisse der Hydrolyse und anschliesende Umsetzung mit Diazomethan zu Poly(methacrylsaure-methylester)n zeigten. Die Verdunnungsreaktion ergab die Produkte 5 der unterdruckten Polymerisation, der innermolekularen Addition mit Kopf/Schwanz- und Schwan…

Polymers and PlasticsChemistryDiazomethaneMedicinal chemistrySolventchemistry.chemical_compoundHydrolysisColloid and Surface ChemistryPolymerizationMethacrylic acidPhenylenePolymer chemistryMaterials ChemistryButyllithiumPhysical and Theoretical ChemistryMethyl methacrylateDie Makromolekulare Chemie
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Quantitative evaluation of the preferential orientation ofpara-phenylene vinylene pentamers in polystyrene films by optically detected magnetic reson…

2007

The morphology of drop-casted and spin-coated films of blends ofpara-phenylene vinylenederived pentamers with polystyrene is investigated by means of X-band optically detected magnetic resonance (ODMR) of the triplet excited states. Adapting an electron spin resonance simulation program to ODMR, the orientation distribution function of the oligomers in the films could be quantified. After drop casting or spin coating the pentamers from a solution, the oligomers tend to lie with their backbones in the plane of the film. The parameters of film preparation and the type of pentamer strongly influence the orientation distribution function. Also, the study of preferentially oriented films allows …

Quantitative Biology::BiomoleculesSpin coatingMaterials sciencePentamerPhysicsAnalytical chemistryZero field splittingAtomic and Molecular Physics and Opticslaw.inventionChemistrychemistry.chemical_compoundCrystallographychemistrylawPhenyleneExcited stateMoleculePolystyreneElectron paramagnetic resonanceApplied Magnetic Resonance
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Electronic coupling responsible for energy transfer in columnar liquid crystals

1999

Electronic coupling is the driving force for energy transfer in molecular materials and consists of several components. We determine the strength of dipolarrmultipolar coupling and coupling due to orbital overlap for excitation transport in triphenylene columnar liquid crystals. We use time-resolved fluorescence spectroscopy and computer simulations. The fit of the experimental and simulated fluorescence decays reveals that the transfer process is dominated by short range interactions .multipolar and orbital overlap but the contribution of long range dipolar interactions cannot be neglected. q 1999 Elsevier Science B.V. All rights reserved.

Range (particle radiation)Analytical chemistryGeneral Physics and AstronomyTriphenyleneOrbital overlapMolecular physicsFluorescence spectroscopyCoupling (electronics)Dipolechemistry.chemical_compoundchemistryLiquid crystalPhysical and Theoretical ChemistryExcitation
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CCDC 1424159: Experimental Crystal Structure Determination

2016

Related Article: Akram Ali, Debanjan Dhar, Suman K. Barman, Francesc Lloret, and Rabindranath Mukherjee|2016|Inorg.Chem.|55|5759|doi:10.1021/acs.inorgchem.5b02688

Space GroupCrystallography(22'-(ethane-12-diylbis((sulfanediyl)-21-phenylene(imino)))bis(46-di-t-butylphenolato))-nickel hexafluorophosphate dichloromethane solvateCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 781080: Experimental Crystal Structure Determination

2011

Related Article: J.-P.Collin, S.Durot, M.Keller, J.-S.Sauvage, Y.Trolez, M.Cetina, K.Rissanen|2011|Chem.-Eur.J.|17|947|doi:10.1002/chem.201002220

Space GroupCrystallography(3)-((mu2-38-bis(5-(2-(Trimethylsilyl)ethynyl)-2-pyridyl)-47-phenanthroline)-bis(29-(116-bis(41-phenylene)-147101316-hexaoxahexadecane)-110-phenanthroline)-di-zinc(ii)) pseudorotaxane tetrakis(trifluoromethanesulfonate) acetone solvate monohydrateCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 2081386: Experimental Crystal Structure Determination

2021

Related Article: Marco Meyer, Lorenzo Mardegan, Daniel Tordera, Alessandro Prescimone, Michele Sessolo, Henk J. Bolink, Edwin C. Constable, Catherine E. Housecroft|2021|Dalton Trans.|50|17920|doi:10.1039/D1DT03239A

Space GroupCrystallography(6-methyl-22'-bipyridine)-([oxybis(21-phenylene)]bis(diphenylphosphine))-copper hexafluorophosphate dichloromethane diethyl ether solvateCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 1419794: Experimental Crystal Structure Determination

2016

Related Article: Marta Feliz and Francisco Estevan|2016|Eur.J.Inorg.Chem.||92|doi:10.1002/ejic.201501085

Space GroupCrystallography(Dihydrogen)-hydrido-bis(11'-(12-phenylene)bis((2R5R)-25-dimethylphospholane))-iron tetrafluoroborateCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 1822503: Experimental Crystal Structure Determination

2018

Related Article: Md. Kamal Hossain, Matti Haukka, Mikko M. Hänninen, George C. Lisensky, Petriina Paturi, Ebbe Nordlander, Ari Lehtonen|2018|Inorg.Chem.Commun.|93|149|doi:10.1016/j.inoche.2018.05.023

Space GroupCrystallography(NN'-bis(35-di-t-butyl-2-oxidophenyl)-12-phenylenediamino)-(N-(35-di-t-butyl-2-hydroxyphenyl)-N'-(35-di-t-butyl-2-oxidophenyl)-12-phenylenediamine radical)-tungsten(vi)Crystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 1519437: Experimental Crystal Structure Determination

2017

Related Article: Arto Valkonen, Giuseppe M. Lombardo, Kari Rissanen, Francesco Punzo, Massimo Cametti|2017|Dalton Trans.|46|5240|doi:10.1039/C6DT04773D

Space GroupCrystallography(NN-dimethylformamide)-(11'-(12-phenylenebis(iminomethyl))bis(naphthalen-2-olato))-dioxo-uranium NN-dimethylformamide solvateCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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