Materials Literature
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The synthesis, photophysical properties, and a biological application of BODIPY-triazole 1 (BOT1) are described. BOT1 juxtaposes a BODIPY fluorophore with a tripodal ligand platform via a triazole bridge. The triazole linker is afforded by azide-alkyne "click" chemistry and comprises the third arm of the tripodal arch…
Hi de hi-drogen: An extremely large hydrogen storage capacity is shown by Li-doped conjugated microporous polymers (CMP). These materials have an isosteric enthalpy of hydrogen adsorption up to 8.1 kJ mol−1, and an excellent hydrogen adsorption of 6.1 wt % was achieved at 77 K under an ambient pressure of 0.1 MPa (1 b…
Peptides are multifunctional reagents (reducing and capping agents) that can be used for the synthesis of biocompatible metal nanoparticles under relatively mild conditions. However, the progress in peptide synthesis of metal nanoparticles has been slow due to the lack of peptide design rules. It is difficult to estab…
Block copolymers have the capacity to self-organize into a myriad of aggregate structures when placed in selective solvents, offering great promise for the construction of delivery vehicles and complex nanoscale assemblies. A key feature of these materials is their propensity to become kinetically trapped in nonequili…
What the biological cell, organ, or barrier actually "sees" when interacting with a nanoparticle dispersed in a biological medium likely matters more than the bare material properties of the particle itself. Typically the bare surface of the particle is covered by several biomolecules, including a select group of prot…
ADVERTISEMENT RETURN TO ISSUEPREVReviewNEXTDendrimers Designed for Functions: From Physical, Photophysical, and Supramolecular Properties to Applications in Sensing, Catalysis, Molecular Electronics, Photonics, and NanomedicineDidier Astruc*, Elodie Boisselier, and Cátia OrnelasView Author Information ISM, UMR CNRS No…
Composite films of chemically converted graphene (CCG) and polyaniline nanofibers (PANI-NFs) were prepared by vacuum filtration the mixed dispersions of both components. The composite film has a layered structure, and PANI-NFs are sandwiched between CCG layers. Furthermore, it is mechanically stable and has a high fle…
ADVERTISEMENT RETURN TO ISSUEPREVReviewNEXTFluorescence Lifetime Measurements and Biological ImagingMikhail Y. Berezin* and Samuel Achilefu*View Author Information Department of Radiology, Washington University School of Medicine, 4525 Scott Ave, St. Louis, USA* To whom correspondence should be addressed. Tel. 314-747…
A binary alloy consisting of poly(phenylene-sulfide) (PPS)/ poly(ethylene terephthalate-co-1,4cyclohexanedimethanol) (PETG) was prepared by the melt blending technology using a twin-screw extruder. The morphology and crystallization behavior of the alloy material were investigated by means of SEM, POM and DSC. The SEM…
The Al-C-N composite films with different Al contents were deposited on Si (100) substrates by closed-field unbalanced reactive magnetron sputtering in a mixture of argon and nitrogen. The microstructures and properties were characterized with X-ray diffraction, X-ray photoelectron spectroscopy Raman spectroscopy, fie…
以α-蒎烯为原料合成了系列新型的N-烷基-N-（α-龙脑烯基）乙酰胺类芳香化合物,并探索了氮原子上取代基的不同结构与产物香气间的构效关系。α-蒎烯经环氧化得到2,3-环氧蒎烷,再经催化异构化反应得到α-龙脑烯醛;α-龙脑烯醛与伯胺缩合、NaBH4选择性还原得到N-烷基-α-龙脑烯胺,再经乙酰化后得到N-烷基-N-（α-龙脑烯基）乙酰胺类化合物。采用1H-NMR、^13C-NMR、FT-IR、MS等对合成酰胺类化合物进行了结构表征,对合成产物的香气特征进行了鉴定。结果表明：N-正丁基-N-（α-龙脑烯基）乙酰胺和N-叔丁基-N-（α-龙脑烯基）乙酰胺具有良好的香气特征,作为新型芳香化合物具有较好的开发价值。
研究了转化率不同时H2调节下TiCl4／MgCl2负载型催化剂催化合成高反式-1，4-丁二烯一异戊二烯橡胶（TBIR）的结构与性能。实验结果表明，聚合初期生成的TBIR中存在较长序列1，4-丁二烯（Bd）单元结构，TBIR中异戊二烯（Ip）链段长度随转化率的增加而增长。门尼黏度相近时，TBIR的生胶强度、断裂伸长率和拉伸永久形变均随转化率的增加而增加，TBIR硫化胶Akron磨耗和回弹性随转化率的增加而增加。动态黏弹测试结果表明，随转化率的增加，TBIR硫化胶的抗湿滑性下降，生热增加。初始投料比n（Bd）：n（Ip）=0．25时，转化率控制在55％～65％时TBIR硫化胶的综合性能最佳。
Two binuclear lanthanide (Ⅲ) coordination complexes, [Tb2 (p-CH3C6H4COO) 6 (phen) 2] (1) and [Sm2 (p-CH3C6H4COO) 6 (phen) 2] (2), have been synthesized by the hydrothermal method, and their structures were determined by single-crystal X-ray diffractometer. At room temperature in the solid state, the IR, UV-Vis-NIR, ex…
A series of 5% (by mass) Ag/MgO catalysts modified with and without Na(superscript +) and halogen anions were prepared, and the performances of these catalysts for epoxidation of propylene were studied under O2-rich condition (p(C3H6):p(O2)=2.53:98.8) by using oxygen as oxidant. It was found that catalysts modified wi…
があることから､T Lは被ばく線量評価や各種の年代測定に用いられてきた ( A i t k e n , 1 9 8 5 ) 0 また石英 粒子の 3 2 5 ℃T L信号の一部は､緑-青色の励起光による紫色光-紫外線の発光現象 ( 光ル ミネ ッセンス o p t i C a l 1 ys t i mu la t e dl u mi ne s o e n c e , ' 以下 OS L; Hu nt l e ye ta l ,1 9 8 5 , ' A i t k e n , 1 9 9 8 , ' Mu r r a ya ndWi nt l e , 2 0 0 3 ) と関連が深いことも知 られてお り､O S L年代測定法 は…
Les films multicouches de polyélectrolytes sont des auto-assemblages de polymères chargés formant des films dont l'épaisseur peut être variée de quelques nm à quelques µm. Un nombre croissant de travaux concerne la compréhension de leur mécanisme d'auto-assemblage et leur utilité pour modifier les propriétés physico-c…
Ce travail traite du rôle joué par les fonctions de surface sur le transport et le piégeage de cations alcalins en présence d'eau, dans des SBA-15 fonctionnalisées. Il s'agit aussi d'étudier les effets de confinement sur la thermodynamique de l'eau adsorbée. La première étape a consisté à synthétiser les différentes S…
In Spain, the waste management options include either the possibility of a final storage in a deep geological repository (DGR) or the centralized temporal surface disposal (CTS). DGRs are based in a multi-barrier concept with the geological barrier and including the vitrified waste, the metal containers and engineered…
A quitosana pode ser modificada e intercalada em silicatos em camadas, através de reação de troca catiônica, resultando em nanocompósitos com propriedades funcionais e estruturais interessantes. Neste estudo, nanocompósitos quitosana/bentonita natural foram preparados pelo processo de intercalação por solução e a infl…
The starch market has been growing and improving, leading to search for products with unique functional properties that industry requirements. The use of native starches is limited, depending on the processing conditions such as temperature, pH, pressure restricting its application in industrial scale. The production…