全文获取类型
收费全文 | 448篇 |
免费 | 35篇 |
国内免费 | 1篇 |
专业分类
化学 | 475篇 |
物理学 | 9篇 |
出版年
2022年 | 4篇 |
2021年 | 1篇 |
2020年 | 12篇 |
2019年 | 3篇 |
2018年 | 1篇 |
2017年 | 6篇 |
2016年 | 19篇 |
2015年 | 13篇 |
2014年 | 16篇 |
2013年 | 18篇 |
2012年 | 50篇 |
2011年 | 60篇 |
2010年 | 19篇 |
2009年 | 9篇 |
2008年 | 48篇 |
2007年 | 25篇 |
2006年 | 31篇 |
2005年 | 26篇 |
2004年 | 25篇 |
2003年 | 30篇 |
2002年 | 20篇 |
2001年 | 20篇 |
2000年 | 6篇 |
1999年 | 4篇 |
1998年 | 2篇 |
1997年 | 2篇 |
1996年 | 3篇 |
1995年 | 2篇 |
1984年 | 2篇 |
1983年 | 1篇 |
1982年 | 1篇 |
1979年 | 1篇 |
1978年 | 1篇 |
1976年 | 1篇 |
1975年 | 1篇 |
1974年 | 1篇 |
排序方式: 共有484条查询结果,搜索用时 125 毫秒
391.
D'Souza F Maligaspe E Karr PA Schumacher AL El Ojaimi M Gros CP Barbe JM Ohkubo K Fukuzumi S 《Chemistry (Weinheim an der Bergstrasse, Germany)》2008,14(2):674-681
Pacman-type face-to-face zinc-porphyrin-fullerene dyads have been newly synthesized and studied. Owing to the close proximity of the donor and acceptor entities, strong pi-pi intramolecular interactions between the porphyrin and fullerene entities resulted in modulating the spectral and electrochemical properties of the dyads. New absorption and emission bands that correspond to the charge-transfer interactions were observed in the near-IR region. Time-resolved transient absorption studies revealed efficient photoinduced electron transfer from the singlet excited porphyrin to the fullerene entity. The rate constants for photoinduced electron transfer are analyzed in terms of the Marcus theory of electron transfer, which afforded a large electron coupling matrix element (V=140 cm(-1)) for the face-to-face dyads. As a consequence of the large charge-recombination driving force in the Marcus inverted region, a relatively long lifetime of the charge-separated state has been achieved. 相似文献
392.
393.
394.
Suzuki Risa Izato Yu-ichiro Yoshino Satoru Komoriya Tomoe Sakamoto Keiichi Miyake Atsumi 《Journal of Thermal Analysis and Calorimetry》2020,140(2):835-842
Journal of Thermal Analysis and Calorimetry - In mixing hazard evaluations, a smaller scale is preferred for safety reasons and in order to conserve the samples. We have developed a small-scale... 相似文献
395.
Hiroshige Ryosuke Goto Satoru Ichii Risa Shimizu Shota Wada-Hirai Ayako Li Ying-Peng Shimada Yohsuke Otsuka Yuta Makino Kosho Takahashi Hideyo 《Journal of inclusion phenomena and macrocyclic chemistry》2022,102(3-4):327-338
Journal of Inclusion Phenomena and Macrocyclic Chemistry - Antioxidants scavenge free radicals and may help prevent disease. However, due to poor stability, continuous intake is required. This... 相似文献
396.
397.
398.
Synthesis of Optically Active,X‐Shaped,Conjugated Compounds and Dendrimers Based on Planar Chiral [2.2]Paracyclophane,Leading to Highly Emissive Circularly Polarized Luminescence
下载免费PDF全文
![点击此处可从《Chemistry (Weinheim an der Bergstrasse, Germany)》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Masayuki Gon Prof. Dr. Yasuhiro Morisaki Risa Sawada Prof. Dr. Yoshiki Chujo 《Chemistry (Weinheim an der Bergstrasse, Germany)》2016,22(7):2291-2298
Optically active, Fréchet‐type dendrimers containing an emissive X‐shaped π‐electron system as the core unit were synthesized. Gram‐scale optical resolution and transformations of 4,7,12,15‐tetrasubstituted [2.2]paracyclophanes were also carried out. The high‐generation dendrons effectively absorbed UV light and transferred energy to the core, resulting in high photoluminescence (PL) from the core. In addition, the dendrons sufficiently isolated the emissive X‐shaped conjugated core and bright emission was observed from both thin films and solutions. Intense circularly polarized luminescence (CPL) was observed from the thin film. The dendrimer films exhibited excellent optical properties, such as large molar extinction coefficients, high fluorescence quantum efficiencies, intense PL and CPL, and large CPL dissymmetry factors. 相似文献
399.
400.
Satoshi Shibata Tomoyoshi Suenobu Shunichi Fukuzumi 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2013,125(47):12417-12417