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41.
Hybrids of Copolymers of Fluorene and C60‐Carrying‐Carbazole with Semiconducting Single‐Walled Carbon Nanotubes 下载免费PDF全文
Fumiyuki Toshimitsu Hiroaki Ozawa Prof. Naotoshi Nakashima 《Chemistry (Weinheim an der Bergstrasse, Germany)》2015,21(8):3359-3366
Three different copolymers of C60‐carrying‐carbazole and fluorene units with different copolymer composition ratios were designed and synthesized. On the basis of photoluminescence, atomic force microscopy, and Vis‐NIR and Raman spectroscopic analysis, we found that these copolymers solubilize only semiconducting single‐walled carbon nanotubes (sem‐SWNTs) to form copolymer/sem‐SWNT hybrids, in which energy transfer from the copolymer/C60 moieties to the SWNTs was revealed. By comparing two possible hybrid structures with molecular‐mechanics simulations, the greatest stabilization was found when the C60 moieties lay on the sem‐SWNT surfaces. 相似文献
42.
The anharmonic temperature factors of atoms with 4mm and 2m site symmetries were formulated following the method of Matsubara, and the formulate were incorporated into a conventional full-matrix least-squares program for structure refinement. In the present treatment, anharmonic terms up to the third order in effective one-particle potentials were taken into account and Boltzmann statistics was employed. 相似文献
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Fumiyuki Ozawa Hidehiko Soyma Takakazu Yamamoto Akio Yamamoto 《Tetrahedron letters》1982,23(33):3383-3386
Various organohalogem compounds can be catalytically converted into α-keto amides on reaction with carbon monoxide and amines. Tertiary phosphine-coordinated palladium compounds are particularly suitable as the double carbonylation catalyst. 相似文献
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Masahiro Yoshida Kazuya Uezu Fumiyuki Nakashio Masahiro Goto 《Journal of polymer science. Part A, Polymer chemistry》1998,36(15):2727-2734
The interfacial activity and the molecular structure of functional monomers are critical factors that determine the success of synthesizing metal-imprinted polymers by surface template polymerization. From this point of view, first we prepared three distinct novel bifunctional organophosphorus monomers that are interspaced, in each case, by an alkyl spacer having a specific length. Each monomer carries two phosphonic acid groups and two aromatic groups in its molecular structures. Further, by using the synthesized bifunctional monomers, we prepared highly selective Zn(II)-imprinted polymers by the surface template polymerization initiated from a water-in-oil emulsion. To evaluate the template effect, we conducted diagnostic adsorption studies on Zn(II)-imprinted and unimprinted polymers with zinc ions. A high interfacial activity was found to be required for the functional monomers to create the predominant template effect. It became clear that Zn(II)-imprinted polymers having bifuctional monomers with 12-length alkyl chains (1,12-dodecanediol-O, O′-diphenyl phosphonic acid: DDDPA) yielded the best results. Moreover, analysis results of adsorption behavior supported a high-performance of the Zn(II)-imprinted polymers with DDDPA. © 1998 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 36: 2727–2734, 1998 相似文献
47.
Qifeng Wang Masayuki Wakioka Fumiyuki Ozawa 《Macromolecular rapid communications》2012,33(14):1203-1207
The synthesis of regioregular head‐to‐tail poly(3‐hexylthiophene)s capped with aryl groups (Ar‐HT‐P3HTs) has been accomplished by palladium‐catalyzed polycondensation of 2‐bromo‐3‐hexylthiophene ( 1 ) via direct arylation. A variety of aryl groups are installed at the initiated end in 86%–98% selectivity using aryl bromides and iodides as capping agents. The polymerization proceeds via a two‐stage process. Before monomer 1 is consumed, the competitive formation of end‐capped and non‐capped HT‐P3HTs is operative, where the molecular weight increases linearly with monomer conversion. After 1 is consumed, the resulting polymers are coupled with each other to afford highly end‐capped HT‐P3HTs. 相似文献
48.
F Ito 《The Journal of chemical physics》2012,137(1):014505
The infrared spectra of molecular complexes containing chloroform (CHCl(3)) and Lewis bases (N(2), CO, H(2)O, and CH(3)CN) have been observed in an Ar matrix, and vibrational peaks for the 1:1 complexes have been assigned. The C-H stretching band of chloroform in the complexes showed a seamless transition from a blue shift (for N(2) and CO) to a red shift (H(2)O and CH(3)CN), in accord with the proton affinity of the base molecules. Density functional calculations predicted that the C-H··(σ-type lone pair) isomer is the most stable, which is consistent with the observed vibrational peak shift upon complex formation. The underlying mechanisms of the C-H hydrogen bond were explored using the topological properties of the electronic charge density and natural orbital analyses. 相似文献
49.
Maeda H Sakamoto R Nishimori Y Sendo J Toshimitsu F Yamanoi Y Nishihara H 《Chemical communications (Cambridge, England)》2011,47(30):8644-8646
Linear and branched Fe(tpy)(2) complex oligomer wires were quantitatively formed on hydrogen-terminated silicon wafers by means of hydrosilylation of ethynylterpyridine and following stepwise coordination reactions, and the redox property of surface-attached species and its photosensitivity can be controlled by the doping density of the silicon wafers. 相似文献
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