Dul, Marie-Claire; Braibant, Bertrand; Dourdain, Sandrine; Pellet-Rostaing, Stéphane; Bourgeois, Damien; Meyer, Daniel
Perfluoroalkyl- vs alkyl substituted malonamides: Supramolecular effects and consequences for extraction of metals
Substitution of extracting molecules with a long perfluoroalkyl chain was performed in order to modulate the weak intermolecular interactions and the supramolecular ordering of an organic system employed to recover metals of interest during liquid–liquid extraction processes. The fluorous compounds were compared to their hydrocarbon counterparts: both molecules present a…
PBDT-TSR: a highly efficient conjugated polymer for polymer solar cells with a regioregular structure
Yao, Huifeng; Zhao, Wenchao; Zheng, Zhong; Cui, Yong; Zhang, Jianqi; Wei, Zhixiang; Hou, Jianhui
In this study, a regioregular copolymer (PBDT-TSR) based on alkythio-substituted two dimensional conjugated benzodithiophene (2D-BDT) and asymmetric thienothiophene (TT) was synthesized through two steps. Compared with its random counterpart PBDT-TS1, the PBDT-TSR shows improved absorption properties and enhanced inter-chain π–π packing effects. The hole mobility of PBDT-TSR is higher than…
Orientation of polymer chains in spherulites of poly(ethylene oxide)-urea inclusion compounds
Gao, Yang; Yao, Shu-Fang; Ye, Hai-Mu; Guo, Bao-Hua; Xu, Jun
Orientation of polymer chains in the spherulites of polymer-small molecule inclusion compounds (IC) is an interesting issue. Two kinds of spherulite morphologies were observed in the metastable β phase of poly(ethylene oxide) (PEO)/urea IC under the same isothermal crystallization temperature. Via polarized micro-Fourier transform infrared spectroscopy and two-dimensional wide angle…
Oligomeric Donor Material for High-Efficiency Organic Solar Cells: Breaking Down a Polymer
Yuan, Liu; Zhao, Yifan; Zhang, Jianqi; Zhang, Yajie; Zhu, Lingyun; Lu, Kun; Yan, Wei; Wei, Zhixiang
A comparison study of photovoltaic properties of an oligomer and a polymer based on the same backbone structure is conducted to show that high-efficiency small molecules can be developed from breaking down polymers. The oligomer attains high-efficiency as a result of the high-degree molecular ordering and the excellent intrinsic phase…
Novel organomodified kaolin/silica hybrid fillers in natural rubber and its blend with polybutadiene rubber
Sreelekshmi, R. V.; Sudha, J. D.; Menon, A. R. Ravindranatha
Phosphorylated cashew nut shell liquid prepolymer (PCNSL) was used as an organomodifier for kaolin and the role of the PCNSL-modified kaolin as a reinforcing nanofiller in natural rubber (NR) and its blends with polybutadiene rubber (BR) was studied. The organomodified kaolin was characterized using thermogravimetric analysis, powder X-ray diffraction, Fourier…
Nonfullerene-Acceptor All-Small-Molecule Organic Solar Cells Based on Highly Twisted Perylene Bisimide with an Efficiency of over 6%
Xin, Rui; Feng, Jiajing; Zeng, Cheng; Jiang, Wei; Zhang, Lei; Meng, Dong; Ren, Zhongjie; Wang, Zhaohui; Yan, Shouke
Two twisted singly linked perylene bisimide (PBI) dimers with chalcogen bridges in the PBI cores, named C4,4-SdiPBI-S and C4,4-SdiPBI-Se, were synthesized as acceptors for nonfullerene all-small-molecule organic solar cells (NF all-SMSCs). A moderate-band-gap small-molecule DR3TBDTT used as the electron donor displayed complementary absorption with C4,4-SdiPBI-S and C4,4-SdiPBI-Se. It was found…
New insights into the beta-form crystal toughening mechanism in pre-oriented PHBV films
Yang, Jian; Zhu, Haijin; Zhao, Ying; Jiang, Qianhong; Chen, Haiming; Liu, Guoming; Chen, Peng; Wang, Dujin
Tensile deformation behaviors of pre-oriented poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) films annealed at different temperatures with or without β-form structures were investigated using the in-situ small and wide-angle X-ray scattering techniques, as well as DSC and SEM. The sample with β-form structure showed better ductility. It is convinced that the system can be…
New Insight into the Chemical Nature of the Plasmonic Nanostructures Synthesized by the Reduction of Au(III) with Sulfide Species
Huergo, M. A.; Giovanetti, L.; Moreno, M. S.; Maier, C. M.; Requejo, F. G.; Salvarezza, R. C.; Vericat, C.
We have studied the products of the controversial synthesis of HAuCl4 with Na2S, which include gold nanostructures (Au NSs) that absorb in the near-infrared (NIR) region and are highly promising for photothermal therapies and other nanomedical applications. From high-resolution transmission electron microscopy, X-ray absorption spectroscopy, and small-angle X-ray scattering, we…
Nanostructured SBA-15 silica: An effective protective vehicle to oral hepatitis B vaccine immunization
Scaramuzzi, Karina; Tanaka, Gabriela D.; Neto, Francisco Mariano; Garcia, Paulo R. A. F.; Gabrili, Joel J. M.; Oliveira, Denise C. A.; Tambourgi, Denise V.; Mussalem, Juliana S.; Paixão-Cavalcante, Danielle; D’Azeredo Orlando, Marcos T.; Botosso, Viviane F.; Oliveira, Cristiano L. P.; Fantini, Márcia C. A.; Sant’Anna, Osvaldo A.
Due to its physicochemical properties, nanostructured mesoporous SBA-15 silica shows great potential as a vaccine adjuvant. This study evaluated the capacity of SBA-15 to encapsulate/adsorb the recombinant purified HBsAg from the Hepatitis B virus and the immunoresponsiveness of mice orally immunized with HBsAg inside SBA-15. A simulation of small angle…
Nanostructured antigen-responsive hydrogels based on peptides for leishmaniasis detection
Souza, Sivoney F.; Silva, Emerson R.; Alves, Wendel A.
Journal of the Brazilian Chemical Society, 2017, vol 28, 9, pp. 1619–1629 DOI: Back to the overview