2013
DOI: 10.1016/j.orgel.2012.12.012
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Linearly polarized emission from PTCDI-C8 one-dimensional microstructures

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Cited by 25 publications
(10 citation statements)
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“…Because reasonable solubility of PBI in solvent media is required for their application in organic solar cells, long alkyl side chains or bulk substituents at the imide positions of PBI, with little effect on the electronic and optical properties of molecules, have been extensively used to improve the solubility of PBI and to fine-tune the π–π stacking arrangement by introducing other interactions from the imide substituents. In contrast, electronic properties of PBI are more sensitive to bulk substituents at the perylene core position, which usually results in a distorted π-conjugated plane and reduced π–π stacking as a result of the steric hindrance. , The aggregation of core-substituted PBI, driven by imide–imide H-bonding interactions and reduced π–π stacking as a result of the bulky core substituents has been reported to show outstanding fluorescent properties . For a given PBI, tuning the volume ratio of good/poor solvent is another important factor for controlling the nanoaggregation and supramolecular assembly process in bulk solution. Good solvents, usually relatively polar aprotic and aromatic solvents (e.g., chloroform, toluene, etc. ), can solubilize PBI by solvating the extended π-conjugated structure, while poor solvents are mostly aliphatic and polar protic solvents [e.g., methanol (MeOH), heptane, etc.…”
Section: Introductionmentioning
confidence: 99%
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“…Because reasonable solubility of PBI in solvent media is required for their application in organic solar cells, long alkyl side chains or bulk substituents at the imide positions of PBI, with little effect on the electronic and optical properties of molecules, have been extensively used to improve the solubility of PBI and to fine-tune the π–π stacking arrangement by introducing other interactions from the imide substituents. In contrast, electronic properties of PBI are more sensitive to bulk substituents at the perylene core position, which usually results in a distorted π-conjugated plane and reduced π–π stacking as a result of the steric hindrance. , The aggregation of core-substituted PBI, driven by imide–imide H-bonding interactions and reduced π–π stacking as a result of the bulky core substituents has been reported to show outstanding fluorescent properties . For a given PBI, tuning the volume ratio of good/poor solvent is another important factor for controlling the nanoaggregation and supramolecular assembly process in bulk solution. Good solvents, usually relatively polar aprotic and aromatic solvents (e.g., chloroform, toluene, etc. ), can solubilize PBI by solvating the extended π-conjugated structure, while poor solvents are mostly aliphatic and polar protic solvents [e.g., methanol (MeOH), heptane, etc.…”
Section: Introductionmentioning
confidence: 99%
“…), can solubilize PBI by solvating the extended π-conjugated structure, while poor solvents are mostly aliphatic and polar protic solvents [e.g., methanol (MeOH), heptane, etc. ], which favor π–π stacking and other non-covalent interactions among PBI molecules. Other operating parameters, such as the concentration, , temperature, , and aggregation time, also need to be considered for achieving optimal nanostructures of PBI with desirable optical/electronic properties.…”
Section: Introductionmentioning
confidence: 99%
“…The peaks at 11.1, 13.2, 19.8, and 23.7°result from the C8PDI crystals. The peaks at 19.8 and 11.1°correspond to d-spacing 4.48 and 7.97 Å, respectively, corresponding to the lattice parameters a (along the length) and b (along the width), respectively (Ameen et al, 2013). And the peak at 23.7°corresponds to d-spacing 3.75 Å, which is a typical intermolecular distance of perylene molecule along the π-π stacking direction (Ameen et al, 2013).…”
Section: Resultsmentioning
confidence: 99%
“…The peaks at 19.8 and 11.1°correspond to d-spacing 4.48 and 7.97 Å, respectively, corresponding to the lattice parameters a (along the length) and b (along the width), respectively (Ameen et al, 2013). And the peak at 23.7°corresponds to d-spacing 3.75 Å, which is a typical intermolecular distance of perylene molecule along the π-π stacking direction (Ameen et al, 2013). Two primary characteristic diffraction peaks of crystalline PEG phase at 2θ 19.2 and 23.2°were also observed (Jiang et al, 2008), corresponding to d-spacing 4.62 and 3.83 Å, respectively.…”
Section: Resultsmentioning
confidence: 99%
“…Different from the single-bond-linked functional carbazole units, the (oligo)-carbazole (e.g., indolo­[3,2- b ]­carbazole, ICz, Figure ) possesses a much larger π-conjugated plane, making it even prefect for molecular self-assembly through the intermolecular π–π interactions . Meanwhile, the perylene diimide derivative (PDI) was also serving as the electron acceptor due to the large π-conjugated planarity as well as the high electron mobility and thermal/chemical stability. According to the theoretical calculation shown in Figure S1, the electron density of states distribution of individual D/A units indicated the non-negligible interactive coupling between the donor and acceptor. Thus, in this paper, indolo­[3,2- b ]­carbazole (ICz) donor and perylene diimide (PDI) acceptor were blended together as the active layer for high-density storage devices.…”
Section: Introductionmentioning
confidence: 99%