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| 1 | Electrospinning preparation and characterization of polyoxometalate fibers显示文摘Poly(vinyl alcohol)/K7[SiW11O39Co(H3P2- O7)] hybrid fine fiber mats (PVA/SiW11Co-P2O7) were prepared through electrospinning technique. After calcinations of PVA/SiW11Co-P2O7 at 500℃ for 8 h, pure SiW11Co-P2O7 fine fibers were obtained with the Keggin structure keeping unchanged. The fiber mats were characterized by IR, ESR, PXRD and scanning electron microscopy (SEM) methods. The average diameter of the fibers is about 250 nm. The SiW11Co- P2O7 fibers showed color change when absorbing and desorbing moisture. | YU Hongquan PENG Jun GUAN Hongyu XIN Zhifeng PAN Yan GONG Jian SHAO Changlu DONG Baoxia | 2006 | Chinese Science Bulletin2006，51，8： | 2 |
| 2 | A novel wavelike chain constructed from Wells-Dawson type polyoxometalates and mixed- ligand decorated transition metalcomplex cations ^2+ 显示文摘 | DONG BAOXIA PENG JUN | 2008 | Journal of Molecular Structure2008，875，： | 1 |
| 3 | Explicating the Role of Metal Centers in Porphyrin-Based MOFs of PCN-222(M) for Electrochemical Reduction of CO_(2)显示文摘The porphyrin-based MOFs formed by combining Zrclusters and porphyrin carboxylic acids with clear M-Nactive centers show unique advantages in electrocatalytic reduction of CO(CORR). However, its conductivity is still the bottleneck that limits its catalytic activity due to the electrical insulation of the Zr cluster. Therefore, the porphyrin-based MOFs of PCN-222(M)(M = Mn, Co, Ni, Zn) with explicit M-Ncoordination were combined with the highly conductive material carbon nanotube(CNT) for discussing the influence of metal centers on the CORR performance based on theoretical calculations and experimental observations. The results show that the PCN-222(Mn)/CNT, PCN-222(Co)/CNT, and PCN-222(Zn)/CNT all exhibit high selectivity to CO(FECO > 80%) in the range of-0.60 to-0.70 V vs. RHE. The FECOmax of PCN-222(Mn)/CNT(-0.60 V vs. RHE), PCN-222(Co)/CNT(-0.65 V vs. RHE), and PCN-222(Zn)/CNT(-0.70 V vs.RHE) are 88.5%, 89.3% and 92.5%, respectively. The high catalytic activity of PCN-222(Mn)/CNT and PCN-222(Co)/CNT comes from the excellent electron mobility of their porphyrin rings and their low ΔG*COOH(0.87 and 0.58 eV). It reveals that the strength of backbonding π of the transition metal and its influence on the electron mobility in the porphyrin ring can affect its CORR activity. | Mengjie Liu Mengting Peng Baoxia Dong Yunlei Teng Ligang Feng Qiang Xu | 2022 | Chinese Journal of Structural Chemistry2022，41，7： | 1 |
| 4 | A New Species of Cupressinocladus from the Lower Cretaceous of Guyang Basin,Inner Mongolia,China and Cluster Analysis显示文摘Cupressinocladus Seward is a fossil genus of conifers and conifer fossils with reproductive organs are very rare.In general,it is difficult to understand the natural affinities with other conifers.In this paper,a new species,Cupressinocladus guyangensis P.H.Jin et B.N.Sun sp.nov.,is reported based on branches with immature female cones from the Lower Cretaceous Guyang Formation of the Guyang Basin in Inner Mongolia,northern China.The foliage shoots are decussate.Leaves are decussate,imbricate,scale-like,weakly dimorphic,and bear longitudinal glands on the abaxial view.Stomata complexes are haplocheilic,monocyclic,irregularly arranged,and spread along the leaf margin.Immature female cones are subglobose with 6-8 cone scales,and three subglobose ovules arranged in a row at the base of the cone scales.Moreover,we performed cluster analysis using a statistics and machine learning toolbox for 23 fossils and extant species based on 16 morphological characters.The result implies that the new species bears a close resemblance to the extant Cupressus funebris Endl.and might have nearest systematic affinities to it. | JIN Peihong MAO Teng DONG Junling WANG Zixi SUN Mingxuan XU Xiaohui DU Baoxia SUN Bainian | 2017 | Acta Geologica Sinica(English Edition)2017，91，4： | 1 |
| 5 | The late Pliocene species with ternate venation of Lauraceae from Tuantian flora, Tengchong, Yunnan Province, China显示文摘A number of fossil leaves of the Lauraceae were collected from Tuantian flora of the late Pliocene strata in Yunnan, China. They have a whole leaf shape and well-preserved cuticles. In this paper, features of the architecture and epidermis of three species of the Lauraceae family with ternate venation are reported. Results of the comparison between the venation characteristics of Lauraceae fossils from four fossil floras in the world and those of extant Lauraceae in China suggest that the proportion of Lauraceae species with ternate venation is increasing. The proportion has risen from 10% in the Eocene to 12.5% in the late Pliocene in China, whereas the proportion in the modern era is 21%. Moreover, the proportion of Australian floras with ternate venation has rised from 8.3% to 10% between the Eocene and the Miocene. Because of the effect of the global drought during the Cenozoic era, we suggested that species with ternate venation in Lauraceae have become increasingly prevalent between the Eocene era and the present day in China. Data on Nerriga flora and Maarlake flora since the Eocene era in the Southern Hemisphere show the same trend. While features of the leaf architecture and epidermis of Lindera acuminatissima differ in details. They all have similar identification characteristics with regard to basal eucamptodromous venation, interior 2° present, minor 2° simple brochidodromous, anticlinal walls, no surface ornamentation, lip-like guard cells, outer stomatal ledge plain or dimness, and paracytic stomatal aperture. These differences are also present in extant species. Compared with Lindera tonkinensis, the nearest living relative(NLR) of L. acuminatissima shows that these differences are relevant to the growth, position, and development of leaves. Leaf-type classification statistics of L. acuminatissima indicate that when all fossil leaves are taken into consideration, A-type leaves account for 24%, B-type leaves make up 56%, and C-typy leaves account for 20%. Comparing the above result with that of NLRs, A-type leaves are generally immature spires and cannot be preserved easily, B-type leaves are regular mature leaves and fossilize more easil, and C-type leaves are usually old leaves occurring at the bottom, broken, ill and consumed by worms. | DAO KeQun DONG Chong XU XiaoHui DU BaoXia WU JingYu XIE SanPing SUN BaiNian | 2013 | 科学通报2013，58，S1： | 0 |
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