全文获取类型
收费全文 | 75篇 |
免费 | 2篇 |
国内免费 | 1篇 |
专业分类
化学 | 31篇 |
力学 | 5篇 |
数学 | 22篇 |
物理学 | 20篇 |
出版年
2022年 | 6篇 |
2021年 | 6篇 |
2020年 | 1篇 |
2019年 | 2篇 |
2018年 | 1篇 |
2017年 | 3篇 |
2016年 | 6篇 |
2015年 | 4篇 |
2014年 | 6篇 |
2013年 | 4篇 |
2012年 | 4篇 |
2011年 | 3篇 |
2010年 | 5篇 |
2009年 | 6篇 |
2008年 | 2篇 |
2006年 | 3篇 |
2005年 | 1篇 |
2004年 | 1篇 |
1993年 | 3篇 |
1990年 | 2篇 |
1989年 | 2篇 |
1987年 | 2篇 |
1983年 | 1篇 |
1982年 | 2篇 |
1980年 | 1篇 |
1976年 | 1篇 |
排序方式: 共有78条查询结果,搜索用时 62 毫秒
71.
Jonathan D. Yuen Mingfeng Wang Jian Fan Dennis Sheberla Moureen Kemei Natalie Banerji Mariateresa Scarongella Sebastian Valouch Toan Pho Rajeev Kumar Eneida C. Chesnut Michael Bendikov Fred Wudl 《Journal of polymer science. Part A, Polymer chemistry》2015,53(2):287-293
The first observation that PBBTPD, a low bandgap, ambipolar conjugated donor-acceptor (DA) polymer based on benzobisthiadiazole (BBT), possesses an open-shell singlet ground state as well as a thermally accessible triplet state is described. Similarly, interesting electronic behavior in semiconducting organic DA oligomers based on BBT is also observed. Theoretical predictions have suggested that such behavior is due to the biradicaloid character of BBT and we provide experimental evidence indicating that these predictions are correct. Furthermore, the open shell character strengthens as the conjugation length increases, as observed in the BBT-based polymer, PBBTPD. We show that this biradicaloid structure is observed in each BBT moiety along the chain and that therefore PBBTPD is in fact a polyradicaloid. This observation will most likely aid in the development of better n-type polymeric acceptors for organic semiconductor applications. © 2014 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2015 , 53, 287–293 相似文献
72.
Nguyen An Viet Nguyen Van Hieu Nguyen Toan Thang Ha Vin Tan 《Theoretical and Mathematical Physics》1989,78(2):224-227
National Center of Scientific Research, Vietnam. Translated from Teoreticheskaya i Matematicheskaya Fizika, Vo. 78, No. 2, pp. 314–319, February, 1989. 相似文献
73.
74.
75.
Nguyen Duc Toan Kuo Yuan Chiu Thai Thi Ha Tran Te‐Fang Yang Yuhlong Oliver Su 《中国化学会会志》2019,66(9):1172-1177
A series of novel sensitizers were successfully synthesized utilizing azobenzene as a π‐linkage unit for the D–π–A structure. A slight red shift on the absorption spectra and λonset of the sensitizers could be observed when the thienyl group was introduced to the acceptor moiety (A). In addition, replacing the donor moiety (D) from carbazole to diarylamino could lead to a negative shift (approximately 0.3 V) in the first oxidation potential. DFT calculation was also carried out and the trend of calculated HOMO–LUMO gaps was consistent to the experimental data obtained from the CV results ( DT1 < DT2 < DT3 < DT4 ). These sensitizers were then employed in dye‐sensitized solar cells to investigate their photovoltaic performances. Highest power conversion efficiency (PCE) of 0.84% was achieved for DT1 ‐based DSSC according to its most bathochromic absorption spectrum. 相似文献
76.
A simple gas flow reactor simulating flash vacuum pyrolysis conditions is described which yields appoximate rate values for monomolecular gas phase reactions and which has been used for a comparison and optimisation of pyrolytic elimination reactions leading to benzocyclobutene. 相似文献
77.
78.
Sayapin Yu. A. Duong Nghia Bang Gusakov E. A. Dorogan I. V. Tkachev V. V. Gorkovets V. S. Komissarov V. N. Duong Ngoc Toan Nguyen Dang Duc Shilov G. V. Aldoshin S. M. Minkin V. I. 《Russian Chemical Bulletin》2016,65(10):2461-2468
Russian Chemical Bulletin - A synthetic procedure towards 4,6-diisopropyl-3-nitro-1,2-benzoquinone was elaborated. Based on this benzoquinone, a series of novel... 相似文献