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| 1 | Spectroscopic evidence for triplet excitation energy transfer among carotenoids in the LH2 complex from photosynthetic bacterium Rhodopseudomonas palustris显示文摘The LH2 complex from Rhodopsudomonas (Rps.) palustris is unique in the heterogeneous carotenoid compositions. The dynamics of triplet excited state Carotenoids (3Car*) has been investigated by means of sub-microsecond time-resolved absorption spectroscopy both at physiological temperature (295 K) and at cryogenic temperature (77 K). Broad and asymmetric Tn←T1 transient absorption was observed at room temperature following the photo-excitation of Car at 532 nm, which suggests the contribution from various carotenoid compositions having different numbers of conjugated C=C double bonds (NC=C). The triplet absorption bands of different carotenoids, which superimposed at room temperature, could be clearly distinguished upon decreasing the temperature down to 77 K. At room temperature the shorter-wavelength side of the main Tn←T1 absorption band decayed rapidly to reach a spectral equilibration with a characteristic time constant of~1 μs, the same spectral dynamics, however, was not observed at 77 K. The aforementioned spectral dynamics can be explained in terms of the triplet-excitation transfer among heterogeneous carotenoid compositions. Global spectral analysis was applied to the time-resolved spectra at room temperature, which revealed two spectral components peaked at 545 and 565 nm, and assignable to the Tn←T1 absorption of Cars with NC=C=11 and NC=C=13, respectively. Surprisingly, the decay time constant of a shorter-con- jugated Car, I.e. 0.72 μs (aerobic) and 1.36 μs (anaerobic), is smaller than that of a longer-con- jugated Car, I.e. 2.12 μs (aerobic) and 3.75 μs (anaerobic), which is contradictory to the general rule of carotenoids and relative polyenes. The results are explained in terms of triplet-excitation transfer among different types of Cars. It is postulated that two Cars with different conjugation lengths coexist in an α,β-subunit in the LH2 complex. | FENG Juan, WANG Qian, ZHANG Xujia, HUANG Youguo, Al Xicheng, ZHANG Xingkang & ZHANG JianpingState Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China | 2004 | Science China Chemistry2004，47，1： | 8 |
| 2 | Cellulose conversion to polyols on supported Ru catalysts in aqueous basic solution显示文摘It is of great significance and challenge to achieve direct conversion of cellulose to specific polyols,e.g.,ethylene glycol and propylene glycol.For such selective conversion,a novel one-pot approach was studied by combination of alkaline hydrolysis and hydrogenation on supported Ru catalysts.A wide range of bases including solid bases,e.g.,Ca(OH)2 and La2O3,and phosphate buffers were examined in the cellulose reaction in water,and the cellulose conversions and polyol products depended largely on the basicity or pH values in the aqueous solutions.Ethylene glycol,1,2-propanediol,and especially 1,2,5-pentanetriol were obtained with selectivities of 15%,14% and 22%,respectively,at 38% cellulose conversion at pH 8 in phosphate buffer solution.These preliminary results provide potentials for efficient conversion of cellulose to targeted polyols by using the advantages of bases. | DENG TianYin,SUN JiYing & LIU HaiChao Beijing National Laboratory for Molecular Sciences,State Key Laboratory for Structural Chemistry of Stable and Unstable Species Green Chemistry Center,College of Chemistry and Molecular Engineering,Peking University,Beijing 100871,China | 2010 | Science China Chemistry2010，53，7： | 8 |
| 3 | HeI photoelectron spectroscopic (PES) studies of the electronic structure in ω-heterocycle a-cyano polyenic ethyl ester compounds显示文摘HeI photoelectron spectra of w-heterocycle a-cyano polyenic ethyl ester compounds (1-6) have been given in this paper. Assignment of the spectra is also done with the aid of HeI photoelectron spectroscopic (PES) results of smaller molecules which have similar atomic group to the molecules studied, and the aid of MNDO molecules orbital calculations. The lowest PES experimental ionization potentials (IPs in eV) of different molecules reduce gradually with the increasing number of ethylenic group. The -CO2C2H5 group can be only considered as a substituent. | LI, Ying LI, Sheng CHEN, Ben-Ming WANG, Dian-XunState Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China | 1996 | Chinese Journal of Chemistry1996，14，3： | 6 |
| 4 | Solution-phase synthesis of inorganic nanostructures by chemical transformation from reactive templates显示文摘The solution-phase synthesis by chemical transformation from reactive templates has proved to be very effective in morphology-controlled synthesis of inorganic nanostructures. This review paper summarizes the recent progress in solution-phase synthesis of one-dimensional and hollow inorganic nanostructures via reactive templates, focusing on the approaches developed in our lab. The formation mechanisms based on reactive templates are discussed in depth to show the general concepts for the preparation processes. An outlook on the future development in this area is also presented. | HUANG Teng & QI LiMin* Beijing National Laboratory for Molecular Sciences (BNLMS), State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry, Peking University, Beijing 100871, China | 2010 | Science China Chemistry2010，53，2： | 4 |
| 5 | The structural model of P_(680)显示文摘INVESTIGATION on photosystem Ⅱ (PS Ⅱ ) of high plants is one of the most important aspects in photosynthesis research. P680 is the primary electron donor in reaction center of PS Ⅱ , which is a crucial component for sun-light conversion and water split in PS Ⅱ. So study on its structure and function is very important. So far, a few structural models of P(680) have been proposed. Typical models are monomolecular model and bimolecular model. There are two types of bimolecular model: bimolecular parallel model and bimolecular angular model. (Note: There is a kind of multiple model. Because it can be obtained from the organization of two bimolecular models, this model is considered as the same sort of bi- | ZHANG Chunxi , ZHANG Xiaodong , LI Liangbi , ZHANG Qiyuan , ZHANG Xingkang and KUANG TingyunPhotosynthesis Research Center and Laboratory of Photosynthesis Basic Research , Institute of Botany , Chinese Academy of Sciences , Beijing 100093, China State Key Laboratory for Structural Chemistry of Unstable and Stable Species , Institute of Chemistry, Chinese Academy of Sciences , Beijing 100080, China | 1999 | Chinese Science Bulletin1999，44，9： | 3 |
| 6 | The comparison between of small mammals in the foci of human plague in Yunnan, China显示文摘 | Guo XG Gong ZD Qian TJ flea communities on the species | 2000 | Entomologia Sinica2000，7，2： | 1 |
| 7 | 显示文摘 | A Determination of total cationic a total anionic arsenic species in oyster tissue usi microwave-assisted extraction followed HPLC-ICP-MS | 2000 | Talanta2000，51，2： | 1 |
| 8 | Transformation of decomposition of bromate under UV mercury bapor lamps显示文摘 | Phillip N H Gurten E bromine species during light from low pressure Engineering 2006 28(4) Diyamandoglu V | 2006 | Science and2006，，： | 1 |
| 9 | Nature显示文摘 | Dikmann U Doebelim on the origin of species by sympatric specnation | 1999 | 400(6742): 354-3571999，400，6742： | 1 |
| 10 | 5 mass concentrations: Revisiting common assumptions for estimating organic mass 显示文摘 | Species contributions to PM2 | | Aerosol Science and Technology0，35，1： | 1 |
| 11 | A minireview 显示文摘 | Wu F Deng N Photochemistry of Hydrolytic Iron( Ⅲ ) Species and Photoinduced Degradation of Organic Compounds | 2000 | Chemosphere2000，41，8： | 1 |
| 12 | &hachtii显示文摘 | Power T O Saddall L J Riggs R D Comparisons of mitochoadrial DNA from sibling species Herodera glycines & H | 1988 | Journal of Nematology1988，20，： | 1 |
| 13 | Satellite Tracking of Post-nesting Migration of Green Turtles显示文摘During the period August 17-28, 2001, in collaboration with the Provincial Bureau of Oceanography & Fisheries of Guangdong and the South China Institute for Endangered Species, the South China Sea Institute of Oceanology, a CAS affiliate in the city of Guangzhou, conducted a sea turtle satellite tracking project at Haigui Bay (Fig. 1) in the vicinity of Gangkou Town, Huidong County, Guangdong Province. | Wang Wenzhi, Wang Dongxiao , Wang Huajie & Song Xiaojun(Key Laboratory of Tropical Marine Environment Dynamics, South China Sea Institute of Oceanology, CAS, 510301 Guangzhou, China)4 (South China Institute for Endangered Species) | 2002 | Bulletin of the Chinese Academy of Sciences2002，16，2： | 1 |
| 14 | Its application in CO2-based car- boxylation of methanol to afford dimethyl carbonate 显示文摘 | ARESTA M DIBENEDETTO A NOCITO F Synthesis and characterization of a novel polystyrene-tethered niobi- um methoxo species | 2010 | Applied Catalysis A : General2010，387，： | 1 |
| 15 | 8S ribosomal DNA and internal transcribed spacer regions 显示文摘 | ADACHI M SAKO Y ISHIDA Y Analysis ofAlexandrium( Di- nophyceae) species using sequence of the 5 | 1996 | Journal of Phycolo- gy1996，32，： | 1 |
| 16 | Vet Parasitol显示文摘 | Bruyne AD Helene Yera Guerhier FL Simple species identification of Trichinella isolates by amplification and se- quencing of the 5S ribosomal DNA intergenic spacer region | 2005 | 3245:52005，3245，： | 1 |
| 17 | Invitroantimicrobial activity of Oscillatoria angustissima显示文摘 | activity of six species of British Phycological Jour- Priyadharshini R Ambikapathy V Pavai T | 2013 | International Journal of Advanced Research2013，1，4： | 1 |
| 18 | An unusual new genus and a f Buccinulidae (Neogastropoda) from the ovince显示文摘 | Kantor Y I P new species o Magellanic Pr astorino G | 2009 | Nautilus2009，123，2： | 1 |
| 19 | Rapid screening of Musa Fusarium wilt in an in vitro bioassay显示文摘 | Wu Y L Yi G J Peng species for resistance to X X | 2010 | European Journal of Plant Pathology2010，128，3： | 1 |
| 20 | Kinabalu, Borneo显示文摘 | Masayuki Ushio Kanehiro Kitayama Teri C Balser Tree species effects on soil enzyme activities through effeets on soil pysicocthemical and microbial properties in a tropical montane forest on Mt | 2010 | Pedobiologia2010，55，： | 1 |
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