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Jiangxi, China

Jinggangshan University is located in Qingyuan District, Ji'an city of Jiangxi province in China. Ji'an is located in the foot of Jinggangshan Mountains.Jinggangshan University is jointly supported by Ministry of Education and the People’s Government of Jiangxi Province, pair-assisted by Tongji University and authorized by Nanjing Military Region for cultivation of military talents and cadres. Wikipedia.

During the past 3 decades, significant progress has been made in multidecker sandwich complexes. Replacing metallocene in the metallocene-based second-order nonlinear optical chromophores with multidecker sandwich complexes will create a variety of new second-order NLO organometallic complexes. To explore the possibility of improving NLO properties of organometallic complexes by using multidecker sandwich complexes, we theoretically design five second-order NLO moleculars VnBzn+1-(C2H2)3-NO2 (n = 1, 2, 3) with widely investigated VnBzn+1 (n = 1, 2, 3) by changing the layer number n or position of conjugation π-A system in the D-π-A structure. The NLO properties of these five complexes are investigated in detail. By comparison with the β0 of ferrocenyl derivative Fe(η5-C5H5)2-(C2H2)3-NO2, the larger NLO response (β0, 10215-36917 au) is found in VnBzn+1-(C2H2)3-NO2 (n = 1, 2, 3). The dependence of the first hyperpolarizabilities β0 on the layer number n and the position of conjugation π-A system is discussed in the article. The evident layer effect on the first hyperpolarizabilities β0 is shown. And, the enlargement of the first hyperpolarizability β0 by the layer number n can be rationalized by considering the enhancement of parallel-x-MLCT (from more than one metal center to acceptor,-NO2), perpendicular-x-MLCT (from multiple metal centers to multiple C6H6 ligands) transition and two-dimensional NLO character with the two charge transfer axes. By comparison with ferrocene or V1Bz2, the multidecker sandwich complexes VnBzn+1 (n = 2, 3) can be considered as stronger donor group for designing NLO moleculars. We hope, this groundbreaking work may evoke one's attention to design new, highly efficient second-order NLO molecular materials with excellent building blocks: multidecker sandwich complexes. © 2015 American Chemical Society. Source

Chen W.-T.,Jinggangshan University
Synthesis and Reactivity in Inorganic, Metal-Organic and Nano-Metal Chemistry | Year: 2014

A new porphyrin FeBr [TCPP-(CH3)4]·0.5(CH3OH) (1), (TCPP = meso-tetra (4-carboxyphenyl) porphyrin), has been synthesized via a solvothermal reaction and characterized by X-ray diffraction. Compound 1 is characterized as an isolated structure with a distorted nonplanar porphyrin macrocycle and an embedded FeIII ion coordinating to four pyrrole nitrogen atoms and one bromine atom. The TCPP is esterified with methanol. The reaction mechanism and photophysical properties were explored. © 2014 Copyright Taylor and Francis Group, LLC. Source

Zeng H.,McGill University | Zeng H.,Jinggangshan University | Li C.-J.,McGill University
Angewandte Chemie - International Edition | Year: 2014

Controlling reaction selectivity is an eternal pursuit for chemists working in chemical synthesis. As part of this endeavor, our group has been exploring the possibility of constructing different natural product skeletons from the same simple starting materials by using different catalytic systems. In our previous work, an isoflavanone skeleton was obtained from the annulation of a salicylaldehyde and an alkyne when a gold catalyst was employed. In this paper, it is shown that a coumarin skeleton can be efficiently obtained through an annulation reaction with the same starting materials, that is, terminal alkynes and salicylaldehydes, by simply switching to a rhodium catalyst. A plausible reaction mechanism is proposed for this new annulation based on isotopic substitution experiments. © 2014 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. Source

Cao C.,Jinggangshan University
Journal of Nanoscience and Nanotechnology | Year: 2011

Through a co-precipitation method Gd(OH) 3:20%Yb 3+, 1%Tm 3+ nanorods were synthesized. After sintered at 900 °C for 1 h in air, the as-prepared Gd(OH) 3:20%Yb 3+, 1%Tm 3+ nanorods were converted into Gd 2O 3: 20%Yb 3+, 1% Tm 3+ nanocrystals. Crystalline phases, sizes, and morphologies of the two samples were characterized by X-ray diffraction and field emission scanning electron microscope. The up-conversion (UC) fluorescence spectra of the Gd 2O 3:20%Yb 3+, 1%Tm 3+ nanocrystals were recorded by using a fluorescence spectrophotometer with a 980 nm continuous wave laser diode as excitation source. The nanocrystals not only present characteristic blue and ultraviolet (UV) UC emissions of activated Tm3+, but also show UV UC emissions of host Gd3+. The experimental study suggests that the excitation power has great effects on UC fluorescence properties and the energy transfer from Tm 3+ to Gd 3+ is very efficient. © 2011 American Scientific Publishers. All rights reserved. Source

Wen L.H.,Liaocheng University | Luo X.B.,Jinggangshan University
Laser Physics Letters | Year: 2012

We investigate the dynamics of vortex formation and the structure of vortex lattices in a Bose-Einstein condensate confined within a rotating double-well (DW) potential. The dynamical process is a formation process of "ghost" vortices, "hidden" vortices, and "visible" vortices. The critical rotation frequency for the creation of visible vortex is indicated by a sudden jump in the angular momentum evolution and an inflexion in the energy evolution. Different visible vortex structures can be formed by ruling the rotation frequency. In particular, structural change of visible vortex patterns can be achieved by regulating the anisotropy parameter of the DW potential. This feature allows to flexibly control the distribution of angular momentum in macroscopic quantum systems and study the interplay among rotation, interparticle interaction and external potential in superfluids. © 2012 by Astro, Ltd. Source

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