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transfer state
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  转移态
     It was concluded that the long-wavelength emission of MBAs in cyclohexane originated from the intramolecular charge transfer state.
     即通过改变苯环上取代基得失电子能力的方法给出了苯甲酸苯胺衍生物分子在非极性溶剂中的长波长荧光发射态为电荷转移态的直接光谱证据。
短句来源
     It is concluded that CL and BP can form a stable electron donor-acceptor complex and light absorption can directly produce excited charge transfer state(CT).
     激发态的计算结果表明,该配合物受光激发能直接产生电荷转移态(CT)。
短句来源
     Results indicated that the intermolecular charge transfer complexes (Inter - CT) between PD molecules are very easy to form even if the concentration is very low. The fluorescence emission of PD comprises the fluorescences from pyrenyl monomer, intramolecular charge transfer state (Intra - CT) and intermolecular charge transfer state complex. The compound PD has good solvatochromism effect, concentration effect and temperature effect, and is a better probe molecule for microenvironment.
     结果表明:即使在较低浓度条件下,PD分子间也容易生成基态电荷转移配合物(Inter—CT),其荧光光谱表现为芘单体荧光、分子内电荷转移态(Intra—CT)荧光以及Inter—CT荧光,并且具有较好的溶致变色效应、浓度效应以及温度效应,是一良好的探针分子化合物.
短句来源
     It is concluded that CL and BP can form a stable electron donor-acceptor complex and light absorption can directly produce excited charge transfer state.
     理论计算验证了给体和受体间能形成稳定的电子给受体配合物 ,该配合物受光激发能直接产生电荷转移态 .
短句来源
  迁移态
     The main emission peak in cubic Gd2O3∶Eu3+ nanocrystal was at 612 nm(the 5D0→7F2 transition). In addition,a red shift for charge transfer state occurred in the excitation spectrum.
     立方相的Gd2O3∶Eu3+纳米晶主发射峰位置在612 nm(5D0→7F2跃迁),激发光谱中电荷迁移态发生了红移。
短句来源
     The main emission peak of Gd_2O_3:Eu~ 3+ nanocrystal was 612 nm, being attributed to ~5D_0→ ~7F_2 transition. The charge transfer state had an obvious red shift in the excitation spectrum. The efficient energy transfer from Gd~ 3+ to Eu~ 3+ was also observed.
     Gd2O3:Eu3+纳米晶主发射峰位置均在612nm处(5D0→7F2跃迁),激发光谱中电荷迁移态发生红移,观察到Gd3+向Eu3+的有效能量传递.
短句来源
     The f-d transition of Dy 3+ , charge transfer state (CTS) and host absorption in VUV excitation spectra are assigned.
     在VUV激发光谱中推测了Dy3+的f-d跃迁及电荷迁移态(CTS)和基质吸收的位置
短句来源
     The other two non-radiation channels, charge (Eu 3+-O 2-) transfer state and multiphonon nonradiative re-excitaton, were also studied.
     对电荷 (Eu3+ O2 - )迁移态和多声子过程另外两种无辐射通道也进行讨论
短句来源
     X-ray excited luminescence features of the crystal were also measured and the emission bands correspond to the transition from charge transfer state to the ground and excited state of Yb 3+ ion.
     测试了Yb:YAG晶体的X射线荧光,发光峰对应于电荷迁移态到Yb3+ 离子的基态、激光态间的跃迁。
短句来源
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  “transfer state”译为未确定词的双语例句
     In the model of M/G/1 queue theory,the gather of decision-making time is serial and the transfer state is stochastic.
     在M/G/1排队模型中,决策时刻的集合为连续时间,状态转移是随机的。
短句来源
     The energy level of charge transfer state(CTS) of Pr~(3+) is lower enough that ~3P_0 can not exist stably but easy to transfer to ~1D_2 by CTS in CaTiO_3:Pr~(3+), and only can emit red light. This is also the main reason to explain the difference of luminescence of Pr~(3+) in the two hosts.
     在CaTiO_3∶Pr~(3+)中Pr~(3+)与基质的能量迁移带位置较低,使得Pr~(3+)的~3P_0光谱能级优先通过能量迁移带弛豫到~1D_2,从而只能发出能量较低的红光,这也是Pr~(3+)在这两种基质中发光性能差异的主要原因。
短句来源
     So there are two ways of energy transfer in YTaO 4:Gd,Eu system. The strong evidences from excitation spectra, emission spectra and diffusive reflection spectra of this system show that Gd 3+ can play an intermediate role in the process of luminescence. There is energy transfer from TaO 3- 4 to Gd 3+ and finally to Eu 3+ via the charge transfer state and spectral overlap.
     对该体系激发、发射及漫反射光谱的研究表明 ,Gd3+ 离子在发光过程中可以作为能量传递的中介 ,该体系在发光过程中存在钽酸根到Eu3+ 离子 ,或者钽酸根到Gd3+ 离子、再到Eu3+ 离子的能量传递
短句来源
     If the ratio was more than 10:1, themass transfer state in bubble column would be worse because plunger flow appeared orliquid phase couldn抰 be mixed well.
     当高径比>10:1时,由于出现塞状流或液相混合不均的原因,肉桂醛和苯乙烯的臭氧化传质状况变差。
短句来源
     Based on the energy conservation, a steady heat transfer model of vertical U-tube ground heat exchanger was developed , The model took the temperature variation of fluid along the depth into consider, and the thermal interference between the two adjacent legs was incorporated by introducing the idea of a thermal interact angle and equivalent distance so as to approach the actual heat transfer state more accurately.
     基于能量平衡法建立了垂直U型埋管的稳态传热模型,模型考虑了流体温度的沿程变化,并通过引入热干扰角与等效传热间距来反映两管脚间的热干扰问题,使之更复合实际的传热情况。
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  transfer state
The promotional effect following the addition of Pt is believed to result from electrical modification of the catalyst maintaining a high electron transfer state.
      
The relaxation time of Fcδ+-Pδ- charge-transfer state for Fc4PH2 was 17±4 ps.
      
Transition from the Q1(π-π*) state to the charge-transfer state was shown to occur within 208±10 fs for Fc4PH2 and 9±3 ps for Fc4PH42+.
      
The abnormally low efficiency of fluorescence of 4-dimethylaminonaphthalimide in polar low-viscosity media at room temperature is associated with the formation of a nonfluorescent charge-transfer state.
      
The dependence of the rate constant of the back electron transfer on ΔG in the back electron transfer reaction with relaxation of the charge-transfer state exhibits the "Marcus-inverted" region.
      
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In this paper steady thermal transfer state for a subsurface cold storage in the spherical, cylindrical and combined cylindrical space form is discussed. By applying the submitted theory and method, we are able to design the subsurface cold storage with the desired thermal resistance. One nomograph and six examples have been given.

本文研究了地下球穴冷库、柱穴冷库及组合柱形冷库稳定传热的热情况,根据本文提供的理论和方法可设计出有所要求的热阻的地下冷库并有算图一张和算例六则。

Boric anhydride (B2O3) is a compound rather strong in acidity. At given temperatures, it can be co-soluble with the metal oxides of alkaline earth, alkali, molybdenum or vanadium, and yeild glassy or solid solutions ' . In this experiment, europium yttrium boratovanadate phosphor has been synthesized using yttrium boratovanadate as the host and europium as the activator. Photoluminescence behaviour has been studied.Appropriate experimental conditions for synthesizing the phosphor and optimal compositions for...

Boric anhydride (B2O3) is a compound rather strong in acidity. At given temperatures, it can be co-soluble with the metal oxides of alkaline earth, alkali, molybdenum or vanadium, and yeild glassy or solid solutions ' . In this experiment, europium yttrium boratovanadate phosphor has been synthesized using yttrium boratovanadate as the host and europium as the activator. Photoluminescence behaviour has been studied.Appropriate experimental conditions for synthesizing the phosphor and optimal compositions for luminescence, (Y0.94Eu0.06) (V0.69B0.01)O3.7, were found out. Adding small amount of rare-earth impurity, e.g.Gd2O3, Sm2O3, has little effect on or a slight enhancement of the europium luminescence under 365nm excitation. However, adding luminescent compounds such as Zn2GeO4. GeO2 :Mn and SrLaBO4 :Pb has markedly enhanced the europium luminescence. This is ascribed to the overlap of the emission bands of the added compounds with the absorption bands of europium. Adding Bi3 + to the phosphor results in a great increase of the luminescence intensity. The excitation band of Bi3 + -containing sample is broadened with peak shifted toward the longer wavelength side. The emission band of Bi3 + peaking at 539nm can be seen in the emssion spectrum (fig. 3). The increase of the luminescence intensity is therefore attributed to the summing up of the Bi3+ and Eu3 + emission.The peak of the excitation band of Eu3+ is at 326nm, corresponding to the excitation transition of the cluster VO43-, and the band may overlap with excitation band of the charge transfer state of Eu (fig. 1,2). Besides, lines at 383, 396, 418, 467 and 539nm in this band correspond to the excitation from 7F0 to 5D4,5L6, BD3, 5D2, 5D1.The emission spectrum of Eu is composed of the lines at 594, 610, 616, 619, 699 and 705nm, the most intense ones are at 616 and 619nm, corresponding to the transition from 5D0 to 7F2.By the investigations of the emission spectra of the sample under different temperatures, it is pointed out that the optimal temperature for luminescence is about 350℃ (fig.5). The effect of temperature on luminescence depends on the energy absorption by the host and Eu, as well as on the increased efficiency of energy transfer from the host to Eu. Below 350℃, the luminescence intensity increases rapidly with the increasing temperature; above this temperature, the decrease follows. It is supposed that Eu can be efficiently excited by ultraviolet light to the charge transfer state(4f72p-1). With the increase of temperature, the charge transfer state lowers down and the absorption band shifts toward longer wavelength side, nearer to the excitation wavelength 324nm of VO43-; whereas the lowered energy level gets nearer to the 4f excited state, thus increase the probability of relaxation to the 4f excited state (the number of phonons corresponding to the energy difference between the two states decreases) resulting in the increase of luminescence intensity. Again, the most important factor is the broadening of the excitation and emission band of VO43- with the increase of temperature, thus increase the overlapping part of the two bands and increase the energy transfer efficiency. Similarly, the absorption band of Eu is also broadaned with the increase of temperature and so increase its overlap with the emission band of VO43- and increase the efficiency of energy transfer from VO43-to Eu3+ resulting in the marked in'crease of lumineicence intensity. However, when the temperature outruns 350℃,thermal quenching begins to play a marked role in the luminescence and causes the luminescence intensity to decrease gradually.

找出了合成Eu~(3+)激活的硼钒酸钇铕发光粉的适宜条件和发光最佳化学组分,它是(Y_(0.94)Eu_(0.06))(V_(0.69)B_(0.31))O_(3.7)。对其发光光谱的温度依赖关系的研究指出,发光最佳温度在350℃左右。发光的这种温度依赖关系与基质和Eu~(3+)对能量的吸收,以及基质向Eu~(3+)能量传递效率的提高有关。此外,试验结果还表明,在365nm激发下,少显Gd_2O_3、Zn_2GeO_4·GeO_2:Mn~(2+)等添加剂的加入提高了样品的发光亮度。

Spectral measurement on selected 7-aminocoumarin derivatives demonstrates that both their absorption and fluorescence emission in a variety of solvents exhibit no detectable change in spectral profile upon addition of certain organic compounds such as phenyl halides, benzene, toluene and cyclohexane. In several cases,however,the fluorescence intensity and lifetime are increased, accompanied by a small shift of emission peak to shorter wavelength, and this fluorescence enhancement is clearly depended on the substitution...

Spectral measurement on selected 7-aminocoumarin derivatives demonstrates that both their absorption and fluorescence emission in a variety of solvents exhibit no detectable change in spectral profile upon addition of certain organic compounds such as phenyl halides, benzene, toluene and cyclohexane. In several cases,however,the fluorescence intensity and lifetime are increased, accompanied by a small shift of emission peak to shorter wavelength, and this fluorescence enhancement is clearly depended on the substitution pattern of aminocoumarin at 7-position as well as on the solvents used,i.e,the fluorescence enhancement can be observed for coumarin with rotatable amino sub-stituent in polar solvents. As a typical example, the fluorescence intensity of 4-trifluoromethyl-7-diethyl-aminocoumarin in methanol is enhanced by a factor of two upon addition of 1,5M phenyl iodide, which is contrary to the gen- eral consideration of so-called external heavy atom effect. Moreover, the similar enhancement is also observed in tht presence of compounds without halogen atom, although the fluorescence intensity increases in a lesser extent. This finding can not be interpreted in terms of changing polarity of the solvent due to addition of this compounds, otherwise it. becomes difficult to understand why a different enhancement can be observed in the presence of phe-nyl halides of the same polarity at the same concentration,although it is not excluded tht possible contribution from changing polarity of the medium in general,particularly,when the compounds of low polarity are used as the additives. On the other hand, the dependence of observed fluorescence enhancement on both the substitution pattern of aminocoumarins and the solvents used leads us to realise this unexpected phenomenon by an argument based on the possible effect of additive on the dynamic equilibrium between the excited cou-marin molecules in fluorescent intramolecular charge transfer state(ICT) and its non-emissive rotamer with twisted conformation(TICT), which have been suaggested by us and G.Jones to be established for nonrigid aminocoumarins in polar solvents. In this connection we postulate that the formation of inter-molecular charge transfer complex between excited aminocoumarin and additive molecule shifts the dynamic equilibrium to the fluorescent ICT state.This postulate for understanding the fluorescence enhancement observed is verified by the kinetic analysis of relevant species decay and the dependence of the observed fluorescence enhancement on the oxidation potential cf the additive used.

测定了在有卤代苯等存在时,一些7-胺基香豆素在不同溶剂中的吸收和发射谱及荧光寿命。所得结果表明,具有给电子能力的有机添加物可对非刚性7-胺基香豆素衍生物在极性溶剂中的荧光起增强作用。基于荧光衰变动力学的分析及添加物的荧光增强能力与其氧化电位的线性关系,提出荧光增强作用的机理是添加物通过分子间电荷转移作用使香豆素分子激发态不发光的TICT态向发光的ICT态转化所致。

 
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