Micro-focused X-ray diffraction characterization of high-quality [6,6]-phenyl-C61-butyric acid methyl ester single crystals without solvent impurities

Paternò, Giuseppe M.; Warren, Anna J.; Spencer, Jacob; Evans, Gwyndaf; Sakai, Victoria García; Blumberger, Jochen; Cacialli, Franco

doi:10.1039/c3tc31075b

Cited by 63 publications

(72 citation statements)

References 33 publications

(37 reference statements)

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“…This complements the information on the high quality of the PCBM crystals as obtained from the XRD measurements, also demonstrating close packing of PCBM within the crystals bulk. 11 In addition to their uniformity, we observed that the crystals measured can be remarkably thin (thickness as low as 49 nm) compared to their lateral dimensions, which are of the order of few micrometers in width and tens of micrometers in length. Interestingly, the topography measurements (AFM measurement reported in Fig.…”

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confidence: 84%

“…We refer the reader to Ref. 11 for further details on the crystals' preparation and XRD characterization, and to Ref. 13 for details of the photoluminescence characterization.…”

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confidence: 99%

“…Recently, we have proposed a solution-based procedure to obtain large, solvent-free, high-quality PCBM crystals. 11 This procedure can be carried out at room temperature, avoiding potential reductions in crystal stability or purity caused by thermal annealing. 12 Micro-focused X-ray diffraction (XRD) (I24-Microfocus MX beam-line at Diamond Light Source-UK) showed that PCBM assembles into a monoclinic unit cell (a ¼ 1.347 nm, b ¼ 1.51 nm, c ¼ 1.91 nm) containing four PCBM molecules.…”

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confidence: 99%

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Traceable atomic force microscopy of high-quality solvent-free crystals of [6,6]-phenyl-C₆₁-butyric acid methyl ester

et al. 2016

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confidence: 84%

“…We refer the reader to Ref. 11 for further details on the crystals' preparation and XRD characterization, and to Ref. 13 for details of the photoluminescence characterization.…”

mentioning

confidence: 99%

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confidence: 99%

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Traceable atomic force microscopy of high-quality solvent-free crystals of [6,6]-phenyl-C₆₁-butyric acid methyl ester

et al. 2016

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“…A stronger indication is the partial covalent bond between hydrogen bond donor and acceptor. 22 For the well-defined monoclinic (P2 1 /n) PC 61 BM the bond lengths and angles can be obtained either from the experimental crystalline data 21 or from DFT-optimized crystal structure. However, the information about the partial covalent bond can only be obtained from DFT calculations.…”

Section: Calculation and Experimental Detailsmentioning

confidence: 99%

“…In this work we study the hydrogen bonds in PC 61 BM solids. First, we analyze the hydrogen bonds in the unique known crystal structure, the monoclinic (P2 1 /n) PC 61 BM crystal, 21 with density functional theory (DFT) calculations. The results indicate the formation of C-H · · · O hydrogen bonds between the molecules.…”

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confidence: 99%

Hydrogen bonds in PC61BM solids

Chen

et al. 2015

AIP Advances

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We have studied the hydrogen bonds in PC61BM solids. Inter-molecular interaction is analyzed theoretically for the well-defined monoclinic (P21/n) structure. The results indicate that PC61BM combines into C–H⋯Od bonded molecular chains, where Od denotes the doubly-bonded O atom of PC61BM. The molecular chains are linked together by C–H⋯Os bonds, where Os denotes the singly-bonded O atom of PC61BM. To reveal the consequences of hydrogen bond formation on the structural properties of PC61BM solids (not limited to the monoclinic structure), we design and perform some experiments for annealed samples with the monoclinic (P21/n) PC61BM as starting material. The experiments include differential scanning calorimetry, X-ray diffraction and infrared absorption measurements. Structural phase transitions are observed below the melting point. The C–H⋯Od bonds seem persisting in the altered structures. The inter-molecular hydrogen bonds can help to understand the phase separation in polymer/PC61BM blends and may be responsible for the existence of liquid PC61BM.

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Pump–Push–Probe for Ultrafast All‐Optical Switching: The Case of a Nanographene Molecule

Paternò

Moretti

Barker

et al. 2018

Adv Funct Materials

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In the last two decades, the three-beams pump-push-probe (PPP) technique has become a wellestablished tool for investigating the multidimensional configurational space of a molecule, as it permits to disclose precious information about the multiple and often complex deactivation pathways of the excited molecule. From the spectroscopic point of view, such a tool has revealed details about the efficiency of charge pairs generation and conformational relaxation in p-conjugated molecules and macromolecules. In addition, PPP has been effectively utilised for modulating the gain signal in conjugated materials by taking advantage of the spectral overlap between stimulated emission and charge absorption in those systems. However, the relatively low stability of conjugated polymers under intense photoexcitation has been a crucial limitation for their real employment in plastic optical fibres (POFs) and for signal control applications. Here, we highlight the role of PPP for achieving ultrafast all-optical switching in p-conjugated systems. Furthermore, we report new experimental data on optical switching of a newly synthesised graphene molecule, namely dibenzo[hi,st]ovalene (DBOV). The superior environmental and photostability of DBOV and, in general, of graphene nanostructures can represent a great advantage for their effective applications in POFs and information and communications technology.

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Micro-focused X-ray diffraction characterization of high-quality [6,6]-phenyl-C61-butyric acid methyl ester single crystals without solvent impurities

Cited by 63 publications

References 33 publications

Traceable atomic force microscopy of high-quality solvent-free crystals of [6,6]-phenyl-C₆₁-butyric acid methyl ester

Traceable atomic force microscopy of high-quality solvent-free crystals of [6,6]-phenyl-C₆₁-butyric acid methyl ester

Hydrogen bonds in PC61BM solids

Pump–Push–Probe for Ultrafast All‐Optical Switching: The Case of a Nanographene Molecule

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Micro-focused X-ray diffraction characterization of high-quality [6,6]-phenyl-C61-butyric acid methyl ester single crystals without solvent impurities

Cited by 63 publications

References 33 publications

Traceable atomic force microscopy of high-quality solvent-free crystals of [6,6]-phenyl-C61-butyric acid methyl ester

Traceable atomic force microscopy of high-quality solvent-free crystals of [6,6]-phenyl-C61-butyric acid methyl ester

Hydrogen bonds in PC61BM solids

Pump–Push–Probe for Ultrafast All‐Optical Switching: The Case of a Nanographene Molecule

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Product

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About

Traceable atomic force microscopy of high-quality solvent-free crystals of [6,6]-phenyl-C₆₁-butyric acid methyl ester

Traceable atomic force microscopy of high-quality solvent-free crystals of [6,6]-phenyl-C₆₁-butyric acid methyl ester