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Designing and preparing the molecular wires with good charge transport performance is of crucial importance to the development of molecular electronics. By incorporating ferrocene into molecular backbones, we successfully enhanced the molecular conductance of OPEs in both tunneling and hopping conduction regimes. Furthermore, we found that the increase degree of molecular conductance in the hopping regime is much more than that in the tunneling regime. Via this approach, the molecular conductance of a long molecule exceeds the molecular conductance of a short one at room temperature. A theoretical calculation provided a possible and preliminary explanation for these novel phenomena in terms of molecular electronic structures. The current work opens the opportunity for designing excellent charge transport performance molecules. An increasing number of new types of molecular wires with this unusual phenomenon are expected to be discovered in the future.

Perfluorosulfonic acid ionomers (PFSI) with different side-chain lengths have been investigated with respect to their morphology and electrochemical properties in vanadium flow batteries (VFB). The results indicated that the membrane with the shortest side chains (SSC-M2) displayed small ion clusters and a low degree of hydrophobic-hydrophilic separation, which is favourable to reduce the cross-over of vanadium ions in the VFB. SSC-M2 shows a similar proton conductivity to Nafion, which carries longer ionic side chains but with much lower ion permeability. As a result, the VFB assembled with SSC-M2 exhibited a superior coulombic efficiency and a voltage efficiency close to that of Nafion115. In situ mass transfer revealed that SSC-M2 had a remarkably low degree of vanadium and water transfer across the membrane, which resulted in lower capacity fading than in the case of Nafion115. These results indicate that a membrane with short side chains is an ideal option in the fabrication of high-performance VFBs with low capacity loss.

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Methyl sulfide terminated trans-oligo(p-phenylenevinylene) derivatives (OPVn, n is the number of phenyl rings) were synthesized, and reversible sol-gel transition was observed in a variety of organic solvents. Investigations with UV-vis, fluorescence, and (1)H NMR spectroscopy revealed that aromatic π-π stacking and van der Waals forces were important in the formation of the gels, with the former being the main driving force for sol-gel transition. The π-conjugation length showed a key influence on self-assembly and gelation property: the gel-to-sol transition temperature (Tgel) increased with π-conjugation length. The gels of OPV4-7 can self-assemble into one-dimensional fibers with different sizes and shapes, depending on their π-conjugation length. On the basis of X-ray diffraction measurements and spectroscopic data, a self-assembly model was proposed. Our observation may be useful for designing functional π-gelators based on π-π stacking.

Background Ewing’s sarcoma is a common malignant bone tumor in children and young adults. Rarely, extra-skeletal soft tissues and visceral organs can also be the site of origin of Ewing’s sarcoma. Primary pulmonary Ewing’s sarcoma is an extremely rare malignancy. Case presentation We report an unusual case of primary pulmonary Ewing’s sarcoma in a 15-year-old girl who initially presented with massive hemothorax. By histopathology evaluation of surgical biopsy specimens, the diagnosis of extraosseous Ewing’s sarcoma was confirmed by both light microscopy and immunohistochemistry. Emergency, open surgery was performed by thoracic surgery at an early stage. After 3 cycles of chemotherapy, the patient was found to be stable at follow-up examination. No more hydrothorax or other symptoms. Conclusions We have described an extremely rare case of primary pulmonary Ewing’s sarcoma with massive hemothorax. The patient underwent surgical resection and postoperative chemotherapy, no sign of recurrence to date as an outcome.

the structure of 1. A similar deshielding was observed e.g. in the spectra of non-reducing dianhydrides of an -galacturonic acid (7). In accord with these data alkaloid I is identical with lepenine, previously isolated from A. pseudohuiliense (8) and base 2 has the same structure as denudatine (9). In preliminary pharmacological tests denudatine (2) decreased the tone and peristalsis of the dog intestine (10); lepenine (1) showed antihypoxic activity and enhanced the action of clinically used hypnotics.