Browsing by Author "Tuncel, D."
Now showing items 1-20 of 31
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[5]Rotaxane and [5]pseudorotaxane based on cucurbit[6]uril and anchored to a meso-tetraphenyl porphyrin
Tuncel, D.; Cindir, N.; Koldemir, Ü. (2006)Water soluble [5]rotaxane and [5]pseudorotaxane based on cucurbit[6]uril and anchored to a meso-tetraphenyl porphyrin have been synthesized and characterized by spectroscopic methods (1H-NMR, 13C-NMR and UV), and by elemental ... -
Catalytic self-threading: a new route for the synthesis of polyrotaxanes
Tuncel, D.; Steinke, J. H. G. (American Chemical Society, 2004)Main chain and branched polyrotaxanes have been synthesized in which polymerization and rotaxane formation occur simultaneously, due to the presence of the catalytically active self-threading macrocycle cucurbit[6]uril. ... -
Conjugated polymer nanoparticles
Tuncel, D.; Demir, Hilmi Volkan (2010)Conjugated polymer nanoparticles are highly versatile nano-structured materials that can potentially find applications in various areas such as optoelectronics, photonics, bio-imaging, bio-sensing and nanomedicine. Their ... -
Construction of multi-layered white emitting organic nanoparticles by clicking polymers
Keita, H.; Güzeltürk, B.; Pennakalathil, J.; Erdem, T.; Demir, Hilmi Volkan; Tuncel, D. (Royal Society of Chemistry, 2015)A series of blue, green and red emitting polymers that are appropriately functionalized with alkyne and azide functional groups have been prepared and clicked together to construct bi-layered and tri-layered white emitting ... -
Cucurbit [7] uril-threaded fluorene-thiophene-based conjugated polyrotaxanes
Idris, M.; Bazzar, M.; Guzelturk, B.; Demir, Hilmi Volkan; Tuncel, D. (Royal Society of Chemistry, 2016)Here we investigate the effect of cucurbit[7]uril (CB7) on the thermal and optical properties of fluorene-thiophene based conjugated polyelectrolytes. For this purpose, poly(9,9′-bis(6′′-(N,N,N-trimethylammonium)hexyl)fl ... -
Cucurbituril-based supramolecular engineered nanostructured materials
Gürbüz, S.; Idris, M.; Tuncel, D. (Royal Society of Chemistry, 2014-11-03)Cucurbituril (CB) is a unique macrocycle with a rigid symmetrical structure, which is composed of two identical hydrophilic portals decorated with partially negatively charged carbonyl groups and a hydrophobic cavity. A ... -
Dispersion of multi-walled carbon nanotubes in an aqueous medium by water-dispersible conjugated polymer nanoparticles
Baykal, B.; Ibrahimova, V.; Er, G.; Bengü, E.; Tuncel, D. (2010)Vertically aligned multi-walled carbon nanotubes (MWCNTs) synthesized by the alcohol catalytic CVD (ACCVD) technique are dispersed in water with the aid of water-dispersible conjugated polymer nanoparticles (CPNs). The ... -
Dual functionality of conjugated polymer nanoparticles as an anticancer drug carrier and a fluorescent probe for cell imaging
Gezici, Ö.; Durmaz, I.; Güven, E. B.; Ünal, Ö.; Özgün, A.; Cetin Atalay, R.; Tuncel, D. (Royal Society of Chemistry, 2014)Multifunctional nanoparticles based on a green emitting, hydrophobic conjugated polymer, poly[(9,9-bis{propeny}fluorenyl-2,7-diyl)-co-(1,4-benzo-{2,1,3}-thiodiazole)] (PPFBT), that acts both as a fluorescent reporter and ... -
The effect of cucurbit[n]uril on the solubility, morphology, and the photophysical properties of nonionic conjugated polymers in an aqueous medium
Tuncel, D.; Artar, M.; Hanay, S. B. (2010)The effects of cucurbit[n]uril on the dissolution and the photophysical properties of nonionic conjugated polymers in water are described. For this purpose, a fluorine-based polymer, namely, poly[9,9-bis{6(N,N-dimethylamino) ... -
Facile synthesis of cross-linked patchy fluorescent conjugated polymer nanoparticles by click reactions
İbrahimova, V.; Ekiz, S.; Gezici, Ö.; Tuncel, D. (2011)Here, we report a novel method to synthesize multifunctional nanoparticles that can be used in biological studies, such as in cell imaging and as a carrier for biomolecules/drugs. The nanoparticles were prepared either via ... -
High-stability, high-efficiency organic monoliths made of oligomer nanoparticles wrapped in organic matrix
Soran-Erdem Z.; Erdem, T.; Gungor K.; Pennakalathil, J.; Tuncel, D.; Demir, Hilmi Volkan (American Chemical Society, 2016)Oligomer nanoparticles (OL NPs) have been considered unsuitable for solid-state lighting due to their low quantum yields and low temperature stability of their emission. Here, we address these problems by forming highly ... -
Highly luminescent CB[7]-based conjugated polyrotaxanes embedded into crystalline matrices
Erdem, T.; Idris, M.; Demir, Hilmi Volkan; Tuncel, D. (Wiley-VCH Verlag, 2017)π-Conjugated polymers suffer from low quantum yields (QYs) due to chain–chain interactions. Furthermore, their emission in solid films is significantly quenched due to aggregation leading further decrease in QY. These are ... -
Molecular switch based on a cucurbit[6]uril containing bistable [3]rotaxane
Tuncel, D.; Özsar, Ö.; Tiftik, H. B.; Salih, B. (2007)A bistable CB6-based [3]rotaxane with two recognition sites has been prepared very efficiently in a high yield synthesis through CB6 catalyzed 1,3-dipolar cycloaddition; this rotaxane behaves as a reversible molecular ... -
Morphology-dependent energy transfer of polyfluorene nanoparticles decorating InGaN/GaN quantum-well nanopillars
Erdem, T.; Ibrahimova, V.; Jeon, D. W.; Lee, I. H.; Tuncel, D.; Demir, Hilmi Volkan (American Chemical Society, 2013)Conjugated polymer nanoparticles (CPNs), prepared in aqueous dispersion from poly[(9,9-bis{3- bromopropyl}fluorenyl-2,7-diyl)-co-(1,4-benzo-{2,1,3}-thiodiazole)] (PFBT-Br), are incorporated into a nanopillar architecture ... -
Nanoparticle labeling of bone marrow-derived rat mesenchymal stem cells: their use in differentiation and tracking
Akhan, E.; Tuncel, D.; Akcali, K. C. (Hindawi Publishing Corporation, 2015)Mesenchymal stem cells (MSCs) are promising candidates for cellular therapies due to their ability to migrate to damaged tissue without inducing immune reaction. Many techniques have been developed to trace MSCs and their ... -
Non-covalent interactions between carbon nanotubes and conjugated polymers
Tuncel, D. (Royal Society of Chemistry, 2011)Carbon nanotubes (CNTs) are interest to many different disciplines including chemistry, physics, biology, material science and engineering because of their unique properties and potential applications in various areas ... -
Non-radiative resonance energy transfer in bi-polymer nanoparticles of fluorescent conjugated polymers
Ozel I.O.; Ozel, T.; Demir, Hilmi Volkan; Tuncel, D. (Optical Society of American (OSA), 2010)This work demonstrates the comparative studies of non-radiative resonance energy transfer in bi-polymer nanoparticles based on fluorescent conjugated polymers. For this purpose, poly[(9,9-dihexylfluorene) (PF) as a donor ... -
On the origin of high quality white light emission from a hybrid organic / inorganic light emitting diode using azide functionalized polyfluorene
Huyal I.O.; Koldemir, U.; Ozel, T.; Demir, Hilmi Volkan; Tuncel, D. (Royal Society of Chemistry, 2008)High quality white light generation with high colour rendering index (CRI) was achieved by integrating a cross-linkable azide functionalized polyfluorene derivative, namely poly[(9,9-dihexylfluorene)-co-alt-(9,9-bis(6-azidohexyl) ... -
One-pot synthesis of hybrid conjugated oligomer-Ag nanoparticles
Balkan, T.; Kizir S.; Tuncel, D. (American Chemical Society, 2017)Here we report one-pot, straightforward synthesis of hybrid conjugated oligomer-silver nanoparticles (AgNPs) by utilizing tertiary alkyl amine and fluorenebenzothiodiazole- containing conjugated oligomer that both acts ... -
Optical and electronic properties of fluorene-based copolymers and their sensory applications
Ibrahimova, V.; Kocak, M. E.; Önal, A. M.; Tuncel, D. (John Wiley & Sons, Inc., 2013)A series of novel, fluorene-based conjugated copolymers, poly[(9,9-bis{propenyl}-9H-fluorene)-co-(9,9-dihexyl9H-fluorene)] (P1), poly[(9,9-bis{carboxymethylsulfonyl-propyl}- fluorenyl-2,7-diyl)-co-(9,9-dihexyl-9H-fluorene)] ...