Controlling the Structures and Photonic Properties of Organic Nanomaterials by Molecular Design

Yao, Wei; Yan, Yongli; Xue, Lin; Zhang, Chuang; Li, Guoping; Zheng, Qingdong; Zhao, Yong; Jiang, Hua; Yao, Jiannian

doi:10.1002/anie.201302894

Cited by 188 publications

(168 citation statements)

References 29 publications

(3 reference statements)

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“…10 The 2D organic crystal system is an ideal system to study the optical and electronic properties. [10][11][12][13] However, compared to the extensive studies of 1D nanostructures, the investigations of large-size 2D The inset of (a) is the chemical structure of BPEA molecule. The inset of (c) is an SEAD pattern recorded within a single nanosheet.…”

Section: Nanosheets Show Obvious Light Emission Anisotropymentioning

confidence: 99%

Large-size nanosheets of 9,10-bis(phenylethynyl)anthracene with high photoresponse and light emission anisotropy

Wang

Peng

Yang

et al. 2016

Phys. Chem. Chem. Phys.

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Section: Nanosheets Show Obvious Light Emission Anisotropymentioning

confidence: 99%

Large-size nanosheets of 9,10-bis(phenylethynyl)anthracene with high photoresponse and light emission anisotropy

Wang

Peng

Yang

et al. 2016

Phys. Chem. Chem. Phys.

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“…Thus the optical loss coefficient (R) of BIC is calculated to be 0.19 dBμm -1 at 440 nm, which is comparable to those of organic crystals with excellent optical waveguide properties. 61 On the contrary, under the excitation of a 351 nm laser, the excited white PL can propagate parallel to the glass substrate in individual BFC along two distinct directions and out-couple at its tip and edge, exhibiting the unique 2D optical waveguide property (Figure 6e). Typically for a long propagation distance in BFC, the intensity of white PL does not loss so much (Figure 6f).…”

Section: Resultsmentioning

confidence: 99%

Rational Design of Charge-Transfer Interactions in Halogen-Bonded Co-crystals toward Versatile Solid-State Optoelectronics

et al. 2015

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Charge-transfer (CT) interactions between donor (D) and acceptor (A) groups, as well as CT exciton dynamics, play important roles in optoelectronic devices, such as organic solar cells, photodetectors, and light-emitting sources, which are not yet well understood. In this contribution, the self-assembly behavior, molecular stacking structure, CT interactions, density functional theory (DFT) calculations, and corresponding physicochemical properties of two similar halogen-bonded co-crystals are comprehensively investigated and compared, to construct an "assembly-structure-CT-property" relationship. Bpe-IFB wire-like crystals (where Bpe = 1,2-bis(4-pyridyl)ethylene and IFB = 1,3,5-trifluoro-2,4,6-triiodobenzene), packed in a segregated stacking form with CT ground and excited states, are measured to be quasi-one-dimensional (1D) semiconductors and show strong violet-blue photoluminescence (PL) from the lowest CT1 excitons (ΦPL = 26.1%), which can be confined and propagate oppositely along the 1D axial direction. In comparison, Bpe-F4DIB block-like crystals (F4DIB = 1,4-diiodotetrafluorobenzene), packed in a mixed stacking form without CT interactions, are determined to be insulators and exhibit unique white light emission and two-dimensional optical waveguide property. Surprisingly, it seems that the intrinsic spectroscopic states of Bpe and F4DIB do not change after co-crystallization, which is also confirmed by theoretical calculations, thus offering a new design principle for white light emitting materials. More importantly, we show that the CT interactions in co-crystals are related to their molecular packing and can be triggered or suppressed by crystal engineering, which eventually leads to distinct optoelectronic properties. These results help us to rationally control the CT interactions in organic D-A systems by tuning the molecular stacking, toward the development of a fantastic "optoelectronic world".

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“…14 The organic nanowires show remarkable optical waveguiding to both tips ( Figure 6A), and the relationship between output intensity and propagation distance can be fitted with the exponential decay function ( Figure 6B) according to the loss mechanism of photon reabsorption. Interestingly, the light guiding became obviously asymmetric in 2D structures despite the excitation positions, as shown in Figure 6C.…”

Section: Optical Waveguiding In One-and Two-dimensional Organic Crystmentioning

confidence: 98%

“…For example, 2-acetyl-6-methylaminonaphthalene (AMN) molecules showed balanced π−π stacking and hydrogen bonds in two crystal directions, resulting in the formation of two-dimensional structures during molecular assembly. 14 The side groups can also make the nanocrystals of 1,5-diaminoanthraquinone (DAAQ) grow much faster on the substrates with higher surface energies, bringing possibilities to prepare vertically aligned nanowire arrays via vapor deposition. 21 Coordination complexes provide an alternative way to tune the optical properties of organic compounds.…”

Section: Design Of Molecular Structures For Photonic Functionalitiesmentioning

confidence: 99%

From Molecular Design and Materials Construction to Organic Nanophotonic Devices

et al. 2014

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CONSPECTUS: Nanophotonics has recently received broad research interest, since it may provide an alternative opportunity to overcome the fundamental limitations in electronic circuits. Diverse optical materials down to the wavelength scale are required to develop nanophotonic devices, including functional components for light emission, transmission, and detection. During the past decade, the chemists have made their own contributions to this interdisciplinary field, especially from the controlled fabrication of nanophotonic molecules and materials. In this context, organic micro- or nanocrystals have been developed as a very promising kind of building block in the construction of novel units for integrated nanophotonics, mainly due to the great versatility in organic molecular structures and their flexibility for the subsequent processing. Following the pioneering works on organic nanolasers and optical waveguides, the organic nanophotonic materials and devices have attracted increasing interest and developed rapidly during the past few years. In this Account, we review our research on the photonic performance of molecular micro- or nanostructures and the latest breakthroughs toward organic nanophotonic devices. Overall, the versatile features of organic materials are highlighted, because they brings tunable optical properties based on molecular design, size-dependent light confinement in low-dimensional structures, and various device geometries for nanophotonic integration. The molecular diversity enables abundant optical transitions in conjugated π-electron systems, and thus brings specific photonic functions into molecular aggregates. The morphology of these micro- or nanostructures can be further controlled based on the weak intermolecular interactions during molecular assembly process, making the aggregates show photon confinement or light guiding properties as nanophotonic materials. By adoption of some active processes in the composite of two or more materials, such as energy transfer, charge separation, and exciton-plasmon coupling, a series of novel nanophotonic devices could be achieved for light signal manipulation. First, we provide an overview of the research evolution of organic nanophotonics, which arises from attempts to explore the photonic potentials of low-dimensional structures assembled from organic molecules. Then, recent advances in this field are described from the viewpoints of molecules, materials, and devices. Many kinds of optofunctional molecules are designed and synthesized according to the demands in high luminescence yield, nonlinear optical response, and other optical properties. Due to the weak interactions between these molecules, numerous micro- or nanostructures could be prepared via self-assembly or vapor-deposition, bringing the capabilities of light transport and confinement at the wavelength scale. The above advantages provide great possibilities in the fabrication of organic nanophotonic devices, by rationally combining these functional components to manipulate light sign...

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Controlling the Structures and Photonic Properties of Organic Nanomaterials by Molecular Design

Cited by 188 publications

References 29 publications

Large-size nanosheets of 9,10-bis(phenylethynyl)anthracene with high photoresponse and light emission anisotropy

Large-size nanosheets of 9,10-bis(phenylethynyl)anthracene with high photoresponse and light emission anisotropy

Rational Design of Charge-Transfer Interactions in Halogen-Bonded Co-crystals toward Versatile Solid-State Optoelectronics

From Molecular Design and Materials Construction to Organic Nanophotonic Devices

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