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121.
122.
van den Brink HB Blok HP Bobeldijk I Bouwhuis M Dodge GE Harakeh MN Hesselink WH Ireland DG de Jager CW Jans E de Jonge N Kalantar-Nayestanaki N Kasdorp WJ Ketel TJ Konijn J Lapikás L van Leeuwe JJ van der Meer RL Nooren GJ Norum BE Passchier E Pellegrino AR Spaltro CM van der Steenhoven G Steijger JJ Templon JA Theunissen JA van Uden MA de Vries H de Vries R de Witt Huberts PK 《Physical review letters》1995,74(18):3561-3564
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124.
Vandana Tripathi Lagy T Baby PV Madhusudhana Rao SK Hui R Singh JJ Das P Sugathan N Madhavan AK Sinha 《Pramana》1999,53(3):535-539
The ground state and excited state transfer yields for the 2-neutron pickup channel in the 28Si+68Zn system have been measured explicitly. The recoil mass separator at the nuclear Science Centre, New Delhi was used for the
measurement. A NaI(T1) detector was used for detecting the deexcitation γ’s from the transfer products. The kinematic coincidence technique was employed for the transfer measurement. Simplified coupled
channels calculations show that out of all transfer channels the major contribution to the sub-barrier enhancement comes from
the ground state 2 neutron pickup channel with a ground state Q-value of+1.83 MeV. 相似文献
125.
126.
Guy Lavigne Noël Lugan Soa Rivomanana Faizel Mulla Jean-Marc Soulié Philippe Kalck 《Journal of Cluster Science》1993,4(1):49-58
An attempt to establish a link between the rich chemistry of ruthenium carbonyl clusters doped by nucleophilic anions, and the known effect of promoters in some ruthenium-based catalytic processes. 相似文献
127.
Dmitry A. Valyaev Oleg V. Semeikin Nikolai A. Ustynyuk Alix Sournia-Saquet Guy Lavigne 《Journal of organometallic chemistry》2007,692(15):3207-3211
The present paper reports the unprecedented observation of a catalytic electrochemical proton reduction based on metallocumulene complexes. Manganese phenylvinylidene (η5-C5H5)(CO)(PPh3)MnCC(H)Ph (1) and diphenylallenylidene (η5-C5H5)(CO)2MnCCCPh2 (3) are shown to catalyze the reduction of protons from HBF4 into dihydrogen in CH2Cl2 or CH3CN media at −1.60 and −0.84 V (in CH3CN) vs. Fc, respectively. The working potential for 3 (−0.84 V vs. Fc in CH3CN) is the lowest reported to date for protonic acids reduction in non-aqueous media. The similar catalytic cycles disclosed here include the protonation of 1, 3 into the carbyne cations [(η5-C5H5)(CO)(PPh3)MnC-CH2Ph]BF4 ([2]BF4), [(η5-C5H5)(CO)2MnC-CHCPh2]BF4 ([4]BF4) followed by their reduction to the corresponding 19-electron radicals 2, 4, respectively. Both carbyne radicals undergo a rapid homolytic cleavage of the Cβ-H bond generating an H-radical producing molecular hydrogen with concomitant recovery of the neutral metallocumulenes thereby completing a catalytic cycle. 相似文献
128.
A Direct,Modular, and Efficient Construction of the PCP Structural Motif through Coupling of Manganese Carbyne Complexes with Phosphines 下载免费PDF全文
Dr. Dmitry A. Valyaev Stéphanie Bastin Kamil I. Utegenov Noël Lugan Guy Lavigne Prof. Dr. Nikolai A. Ustynyuk 《Chemistry (Weinheim an der Bergstrasse, Germany)》2014,20(8):2175-2178
Easily available carbyne complexes of manganese were used as a source of carbyne fragments in an unconventional synthesis of backbone‐substituted diphosphinomethanes and cyclic P‐ylides upon coupling with secondary or tertiary phosphines, respectively, followed by demetalation under mild conditions. 相似文献
129.
César V Tourneux JC Vujkovic N Brousses R Lugan N Lavigne G 《Chemical communications (Cambridge, England)》2012,48(17):2349-2351
An elusive free 4-(isopropylamino)imidazol-2-ylidene is engaged in a tautomeric equilibrium with its mesoionic tautomer, 4-(isopropylamido)imidazolium, which displays the typical reactivity of a cyclic diaminocarbene; once coordinated to a Rh(I) centre, it undergoes a smooth 4e(-) oxidation of its backbone to yield an amido-amidino-carbene, a weak electron donor viable only in its complexed form. 相似文献
130.
Conjugated, borole-linked polymers have been self-assembled based on boronate ester formation between a fluorene-2,7-diboronic acid and 1,2,4,5-tetrahydroxybenzene. Readily soluble polymers with molecular weights approaching 60 000 have been generated with materials exhibiting extended conjugation over approximately 3-5 borole linkages. Emission from these polymers reaches into the visible (blue) range, representing a novel class of blue-emitting materials. 相似文献