Conjugated Polymer Nanoparticles via Intramolecular Crosslinking of Dendrimeric Precursors

Taranekar, Prasad; Park, Jin Young; Patton, Derek L.; Fulghum, Timothy; Ramon, Glenn J.; Advincula, Rigoberto C.

doi:10.1002/adma.200600491

Cited by 65 publications

(67 citation statements)

References 50 publications

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“…8a). [21] The UV-vis peaks of the nanoparticles were not shifted and were found to be independent of the number of CV cycles. This indicated the formation of more conjugated polycarbazole species in which the ligands remained attached to the surface of the nanoparticles.…”

Section: Uv-vis and Fluorescence Studiesmentioning

confidence: 85%

“…For example, we have recently reported the synthesis of dendrimeric precursors in which peripheral carbazole units are present. [21] This carbazole units are essentially electroactive monomer units which are capable of forming individual conjugated polymer nanoparticles as well as being incorporated in thin film devices for sensor applications. [22,27] The latter involved the electrochemical crosslinking of the carbazole units on an electrode substrate resulting in a highly cross-linked structure of a conjugated polymer network film.…”

Section: Cyclic Voltammetry Studiesmentioning

confidence: 99%

“…[20] We have recently reported the synthesis of dendrimeric precursors based on convergent and divergent synthesized dendrimers in which peripheral carbazole units are present. [21] These dendrimers are capable of forming individual conjugated polymer nanoparticles as well as being incorporated in thin film devices for sensor applications. [22] In this work, carbazole containing dendrons were synthesized based on second generation Frechet-type polybenzyl ether dendrons (2GPO) which were subsequently derivatized with phosphonate ( Fig.…”

Section: Introductionmentioning

confidence: 99%

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Hybrid CdSe Nanoparticle–Carbazole Dendron Boxes: Electropolymerization and Energy‐Transfer Mechanism Shift

Park¹,

Taranekar²,

Park³

et al. 2008

Adv Funct Materials

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Carbazole containing ligand dendrons are designed based on second generation polybenzyl ether dendrons (2GPO). This is subsequently used for directly synthesizing and capping CdSe nanoparticles in contrast to ligand exchange for introducing functionality. The stable hybrid CdSe‐2GPO quantum dot nanoparticles have characteristic energy‐transfer properties from the donor carbazole peripheral groups to the acceptor CdSe nanoparticles, i.e., overlap of the fluorescence of the carbazole with the absorbance of the CdSe nanoparticle resulting in an enhanced fluorescence with concentration through Förster resonance energy transfer (FRET). However, electropolymerization of the peripheral electroactive carbazole units result in a red‐shift in absorbance and quenching in fluorescence. This is attributed to a reversed molecular orbital energy order with respect to the electropolymerized carbazole dendron and CdSe nanoparticle. The hole‐transfer results in fluoresence quenching and charge transfer between the CdSe nanoparticles and the polycarbazole peripheral units. The photoelectric alteration may yet provide for an interesting electro‐optical or sensing device application based on electrochemical properties of the hybrid material.

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Section: Uv-vis and Fluorescence Studiesmentioning

confidence: 85%

Section: Cyclic Voltammetry Studiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Hybrid CdSe Nanoparticle–Carbazole Dendron Boxes: Electropolymerization and Energy‐Transfer Mechanism Shift

Park¹,

Taranekar²,

Park³

et al. 2008

Adv Funct Materials

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show abstract

“…Advincula et al have reported a number of carbazole and polycarbazole precursors for the formation of conjugated polymer networks (CPN) and nano-objects. [51][52][53] One reason for the preference to carbazole over other electroactive groups is that it has two distinct strong absorption peaks in the spectra and also a strong emission in the visible region.…”

Section: Introductionmentioning

confidence: 99%

Gold Nanoparticle/Carbazole Dendron Hybrids

Danda

Ponnapati

Dutta

et al. 2011

Macro Chemistry & Physics

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The synthesis, spectral properties, and electropolymerization of hybrid gold nanoparticle core/carbazole dendron shells are reported. Ligand exchange of short‐chain alkane thiol stabilized Au‐NP is compared with direct synthesis using peripheral carbazole dendron ligands. Optical spectra, light scattering, TEM, and electron diffraction data confirm size, polydispersity, and composition. The direct synthesis route yields higher carbazole surface functionality. Higher dendron generation yields larger carbazole species on the surface. The advantage of a larger Au‐NP core is highlighted in terms of conformational mobility and electropolymerizability to form π‐conjugated polycarbazole species. Absorption and fluorescence shift is observed with the electropolymerized film. magnified image

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“…application in biomedicine, thin-film electronics and energy devices. For example, the chemical modification of PF-based CPNs such as by covalent cross-linking processes afforded them more robustness and mechanical stability [205]. In this context, several fascinating aspects to focus on are nanoparticle chemistry and physics processes, with many prospects for practical applications.…”

Section: Introductionmentioning

confidence: 99%

Fluorene-based macromolecular nanostructures and nanomaterials for organic (opto)electronics

Xie

Yang

Lin

et al. 2013

Phil. Trans. R. Soc. A.

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Nanotechnology not only opens up the realm of nanoelectronics and nanophotonics, but also upgrades organic thin-film electronics and optoelectronics. In this review, we introduce polymer semiconductors and plastic electronics briefly, followed by various top-down and bottom-up nano approaches to organic electronics. Subsequently, we highlight the progress in polyfluorene-based nanoparticles and nanowires (nanofibres), their tunable optoelectronic properties as well as their applications in polymer light-emitting devices, solar cells, field-effect transistors, photodetectors, lasers, optical waveguides and others. Finally, an outlook is given with regard to four-element complex devices via organic nanotechnology and molecular manufacturing that will spread to areas such as organic mechatronics in the framework of robotic-directed science and technology.

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Conjugated Polymer Nanoparticles via Intramolecular Crosslinking of Dendrimeric Precursors

Cited by 65 publications

References 50 publications

Hybrid CdSe Nanoparticle–Carbazole Dendron Boxes: Electropolymerization and Energy‐Transfer Mechanism Shift

Hybrid CdSe Nanoparticle–Carbazole Dendron Boxes: Electropolymerization and Energy‐Transfer Mechanism Shift

Gold Nanoparticle/Carbazole Dendron Hybrids

Fluorene-based macromolecular nanostructures and nanomaterials for organic (opto)electronics

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