最新刊期
卷 7 ， 期 1 ， 1986
- 摘要：The energy transfer in the rare earth organic phosphors was discussed. Organic ligands with suitable position of triplet may be used to sensitize the luminescence of rare earth ions, or the position of the triplet of the organic ligands may be estimated according to the position of theof the excited state of the luminescent rare earth ions. The intensity of emission may be enhanced and the emission bands may be splitted by the formation of organic complexes, especially of organic complexes with mixed ligands. But the function groups containing hydrogen such as -OH having high vibronic frequence may quench the luminescence of the rare earth ions, so the intensity of emission and the lifetime may be enhanced by use of the deuterated or fluorinated organic compounds or systems containing other heavy atoms. Therefore, organic solvents or water molecules have important effect on the luminescence of the rare earth ions. Rare earth organic phosphors have been used in such fields as: liquid laser materials, solar luminescence concen-tractor, luminescent plastic films, detection of defects, diagnosis of integrated circuit by thermal imaging, analysis of trace amount of rare earth and luminescent probes for biomolecular systems.133|92|0更新时间：2020-08-11
- 摘要：It is the purpose of this paper to summarize the studies on the formation of bichromophric intramolecular excited complex in our laboratory in recentyears.95|65|0更新时间：2020-08-11
- 摘要：This paper reports the concepts of the fractal and exciton percolation (random walk) and the most new results of the luminescence in fractal structures of organic compounds and proteins.We show that the energy transfer on fractal structures of organic compounds where the direct trapping depends on the fractal dimension d, while the multistep trapping is given in terms of the spectral dimension d.Triplet-triplet exciton (neutral Frenkel triplet exciton) annihilation on percolation clusters produces a singlet exciton. On fractal spaces, the kinetic equation of the annihilation depends on the spectral dimension d. It is observed from experiment that dimensionality changes asymptoticly from d(fractal space) to dimension d (Euclidean space) with the change of local heterogeneity of the system.107|64|0更新时间：2020-08-11
- 摘要：Electron transfer in the primary processes of photosynthesis has been reviewed with the emphasis on the recent experimental results obtained from the luminescence examination of covalently linked porphyrin-quinone compounds. The effect of the mutual separation and orientation between the interacting moieties on the intramolecular electron transfer has been discussed and some subjects interested in the further investigation are pointed out as well.115|64|0更新时间：2020-08-11
- 摘要：An apparatus for bioluminescence has been developed which is a non-invasive way to measure the emission count rate on body surface at fingertips directly. The works have been studied for ten years with 2000 cases. It introduce in this paper that the emission rate related with several physiological and pathological states.1. As noted the test of 361 cases of various age groups, the emission rate increased with age, and showed a S-shaped curve which corresponding to grouth principle curve of human body.2. The emission rate of patients with hyperlipemia was stronger than that of normal group. P<0.02-0.05. It indicated that the emission rate of human body surface correlate with lipid concentration in serum.3. The emission rate in tumor patients was lower than that of non-tumor control group. P<0.001 (small fingertip).4. The emission rate related with smoking: (1) Smoking leds to aging early.(2) This data has indicated that damage of smoking especially to lung, stomach, large-intestine, heart-blood system.(3) The dynamics curve of emission rate has been observed. In tumor group, it showed that emission reached a peak after 5 min smoking, and then declined slowly. The emission count rate has a half decay time of approximately 30 min.122|51|0更新时间：2020-08-11
- 摘要：The luminescence of the natural proteins and plant pigments belong to the biological luminescence. The biological luminescences are an important branch of biological sciences. At present, the biomolecular luminescence are concentrated to the absorption of photon, the relax processes of excited state, the energy transfer and the physical processes under the action of super-short pulse laser etc.In this paper, we discussd the optic-physical processes of the chla in vivo. In addition, the spectra of the absorption, excitation and emission for the monomer, dimer and oligomer of the plant pigment are also measured. It is found that the energy levels of the triplet exciplex for the chla are lower. We also discuss the annihilation processes of aten antenna-pigments and evaluate the effective parameters of the bulk energy-transfer. At the last, we review the futures of biomolecular luminescence and some possibilition for their applications.101|57|0更新时间：2020-08-11
- 摘要：Photobiology and photochemistry are promising research areas for short pulse techniques. Boubled Nd:YAG mode locked laser provide moderately intense stable pulses of circa 25 ps duration,at a high repeatition rate.Such a laser system is an ideal excitation source for the measurement of energy-resolved fluorescence decay profiles. When used oscilloscope coupled with fast photodiode and well tested deconvolution procedures the system is capable of measuring complex(multi component)fluorescence decays in the time range of lns-100ns.Fluorescence decays profile is measured for kiton red dyes in various solution. Fluorescence decays in the time about 5ns.107|65|0更新时间：2020-08-11
- 摘要：The DMANS (4-dimethylamino-4'-nitrostilbene) is a better one of fluorescence dyes. It has three characteristics: Short fluorescence lifetime, higher quantum efficiency and larger Stokes shift. The spectrum Stokes shift depends on the polarity and the flexibility of the polymer matrix.In order to prepare a fast red-emission plastic scintillators and a solar energy collector, we have studied that the fluorescence behaviour of the DMANS in the polystyrene and the flexible polystyrene. Absorption spectrum, fluorescence spectrum,fluorescence intensity and fluorescence lifetime of these samples have been measured. Results indicate that the polarity and the flexibility of polymer matrix influence the fluorescence behaviours of the DMANS. The mechanism of influorescence behaviour has been discussed also.101|72|0更新时间：2020-08-11
- 摘要：The Raman spectra of anthracene single crystal have been measured at 300K and 77K using CW Ar laser 5145Å excitation. The Raman lines were observed in the region 20-2900cm-1. The results are as follows:1. Most of Raman spectra have symmetry line shape and very sharp. However, in the region 20-200cm-1,the Raman spectra are broad and overlap each other.2. Fundamental vibrations of anthracene crystals are assigned according to the space group of anthracene crystal and the distribution of Raman active normal vibrations among the symmetry classes in anthracene. From the results it appears that the assignments of the ag, b1g, b3g normal mode vibrations agree with experiment and theoretical results from references.3. The lattice vibrational Raman spectra of anthracene crystals exhibit remarkable temperature effects. In the region 20-200cm-1, at 300K, the spectra are so broad and overlapping that spectra hardly distinguished from each other; at 77K, the individual spectra get sharp and at the same time they shift toward higher frequencies. The mean square amplitude of the rotational oscillation of the anthrecene molecule about one of the principal axes is calculated in order to explain the effects of temperature on Raman spectra.92|60|0更新时间：2020-08-11
- 摘要：The fluorescence lifetime of anthracence in three different states (solution, crystal, thin film) have been systematically measured by means of single-photon counting technique. Because there are a few disadvantagous factors: 1) finite time width of the excitation source; 2) transit time divergency of photomultiplier; 3) finite response time of electronic systems. These factors have been removed by deconvolution method and then accurate lifetime values have been obtained. We have got following conclusions: i) the lifetime of anthracence in benzene and ethanol shorten with increase of the concentration (Table 1) and they are approximately the same for different emission peaks in the solutions; ii) the lifetimes of anthracence in the solids are longer than that in the solutions. (τ=15.3ns for the crystal, τ=19.lns for the thin film).The excitation, emission spectra have been measured in the different states. It is observed that there are widening of emission bands and red shift of emission peaks in the solids. There are greater change for the excitation spectra and much smaller for the emission spectra with the increase of the concentration.It is considered that the lifetimes shortened with the increase of the concentration come from concentration quenching. The obvious change for the excitation spectra in different concentration may be originated from the interaction between different condensed anthracence molecule states.138|76|0更新时间：2020-08-11
- 摘要：Several bischromophore compounds 2-(ω-biphenylyl polymethylene)-5-biphenylyl oxadiazole-l,3,4(F1-(CH2)n-F2), compounds 1,2,3,4 respectively n = l,2,3,4, and the corresponding model compound 2-methyl-5-bi-phenylyl oxadiazole-1,3,4 (compound 5) have been synthesized. The intramc lecular energy transfer has been studied by fluorescence emission spectra.108|53|0更新时间：2020-08-11
- 摘要：Energy transfer between Anthracene (An), Acridine Yellow (AY) and Basic Red 13 (BR) molecules has been studied in aerated fluid solutions by fluorescence spectrometer and time-corrected single photon counting technique. As shown in Fig. 2, An's emission spectrum is overlapped with AY's absorption spectrum, and AY's emission spectrum is overlapped with BR's absorption.And all of them have suitable absorption and emission efficiencies. The energy absorbed by An is transfered to AY. and then from AY to BR (Fig. 4,).124|39|0更新时间：2020-08-11
- 摘要：The excitation and fluorescence emission spectra of Coumarin 4-DCM, Coumarin 481-DCM, Coumarin 540A-Rhodamine 6G and Coumarin 540A -Rhodamine 640 systems in alcoholic solvents have been measured. The results obtained clearly show the occurance of intermolecular excitation transfer between the donor and acceptor molecules in each system examined. However, the fuorescence intensity of acceptor is increased by excitation transfer from the donor molecule. Such as in the Coumarin 4 and 481-DCM systems, the emission of coumarins is quenched by addition of DCM, but no enhancement of DCM emission is observed in these cases, and the emission intensity of DCM even becomes reduced as compared with that observed in the absence of added coumarins as a donor.121|37|0更新时间：2020-08-11
- 摘要：Rareearth metal salts of organic carboxylic acids are newtype luminescent materials of high efficiency and promise extensive usefulness. They have good thermical, Chemical and physical stability.Thirty conjugated carboxylates of europium have been prepared in this work, for example:Eu3+-Tris-p-acetaminobenzoate, Eu3+-Tris-p-benzoylaminobenzoate,Eu3+-Tris-o-benzoylbenzoate, Eu3+-Tris-2-picolinate, Eu3+-Tris-3-picolinate, Eu3+-Tris-4-picolinate et al.109|49|0更新时间：2020-08-11
- 摘要：Interest in fluorescent property of crown ether complex can be said to have begund 1980. The first, the fluorescent properties of alkalicatipn crown ether complex were presented by Sousa and Larson.Recently, some authors have investigated the luminescent properies of lanthanide crown ether complexes of in solvent, it was found that fluorescent intensity can enhance considerly in some solvent.However up to now that the spectral properties have been investigated very rarely particlarly, solid crown ether complexes.106|52|0更新时间：2020-08-11
- 摘要：Chemiluminescence occurs when the exothermicity (ΔG) of a chemical reaction is converted into electronic excitation energy(*) of a reaction product, which then emits photons of light (hv). We can describe chemiluminescence as a ΔG→:→hv sequence. The heart of the sequence is the chemi-excitation (ΔG→)step.The field of chemiluminescence has experienced tremendous growth and witnessed significant advances in the past more ten years. To a large extent, the recent progress toward the understanding of chemiluminescent processes can be attributed to achievements in three general areas. The first area of achievement was the discovery and subsequent intensive investigation of the chemiluminescent reaction of 1,2-dioxetanes. The discovery of this reaction, a simple unimolecular rearrangement, has allowed experimentalists to focus on the study of the key step of chemiexcitation. A second area of recent advance has come in the field of electron-transfer chemiluminescence. Electron-transfer chemiluminescence has been investigated extensively as elctro-generated chemiluminescence (ECL). Using ECL technique significant progreas has been made in recent years toward the understanding of chemiexcitation by electron transfer. A third general area of recent progress has been the confirmation of chemically initated electron-exchange luminescence(CIEEL) as a general mechanism for the general chemical formation of light.In this review we have introduced the classification of chemiluminescent organic reactions, examined the general requirements for a reaction to be chemiluminescent, presented the three important generalized mechanisms of chemiluminescence in solution, and finally enumerated some important chemiluminescent systems.123|72|0更新时间：2020-08-11
- 摘要：The chemiluminescence spectra of quercetin have been measured,λmax is 520 nm.The reaction of quercetin chemiluminescence,the flourescence during the reaction,the kinetic characteristics,and the paper chroma tog raphy of the products of this reaction have been studied.The possible mechanism of the chemiluminescence of quercetin-H2O2-KOH system has been originally proposed.129|51|0更新时间：2020-08-11
- 摘要：The present paper studied and discovered the fact that some alcohols arose chemiluminescence in alkaline H2O2. The mechanism of such chemi-luminescence is discussed in brief and is shown that the chemiluminescence occurs in the step of alcohol oxidized into aldehyde. The quantum yield is also estimated by simple methods. As for the idea of the enhancement of CL by the alcohol, the present paper gives a newer explanation.The said system EtOH-H2O2-OH- has been applied to the determination of metal ions, since we found that Co(Ⅱ), Fe(Ⅱ), Ni(Ⅱ), Pb(Ⅱ), Hg (Ⅱ), Cr(Ⅲ), Ag(Ⅰ), Mn(Ⅱ), Eu(Ⅲ), and Cu(Ⅱ) could be used as an analyze respectively to catalyze the oxidation reaction of H2O2 with alcohols under favorable conditions. The procedure of determining Co(Ⅱ) by the application of the said system has been shown in detail, and the detection limit of the Co(Ⅱ) is calculated as 2×10-8g/ml.109|45|0更新时间：2020-08-11
- 摘要：Lipid Membrane peroxidation of plane lipid membrane, liposome, red blood cell ghost peroxidation was investigated by chemiluminescence (CL), The results were showed as follows:1. There are lipid peroxidation and spontaneous CL on the lipid membrane. The peroxidation and CL intensity related to the content of unsatu rated fatty acid. CL was enhanced by physical and chemical factors.2. The lipid membrane peroxidation depended on temperature, pH, PO2 and lipid concentration in its medium. These factors should be carefully controlled during experiments.3. Utraweak lipid peroxidation could be measured by CL,CL measurement with liquid scintillation counter (L.S.C.) is a more sensitive, faster and simpler method.90|59|0更新时间：2020-08-11
- 摘要：Measurement of chemiluminescence (CL) may be used in immunological researches for functional study of polymorphonuclear cells (PMNs) and luminescent immunoassay.PMNs may be activated by various stimulants such as opsonized zymosan, immune complexes (IC), PMNs-combining antibody etc. with oxidative metabolic enhancement which may be measured by luminometer. The functions of PMNs are expressed with the CL peak and the peak time arrived. Measurement of CL will be used in the diagnosis of PMNs diseases, in the immunopathological and basic immunological researches.Luminescent immunoassay (LIA) has been established recently. The principles of LIA are same as RIA or EIA, but luminol, iscluminol or peroxidase are used as labelling substances. Due to the characteristics of rapidity, sensitivity and specificity of the reacticns, LIA will be tsed broadly in many aspects of imnunological researches.112|96|0更新时间：2020-08-11
- 摘要：The hematoporphyrin have several isomers. These isomers often exist in two types, alternate substitute and non-symmetry substitute.At the room temperature, the spectra of the hematoporphyrin in solution have the character of broad band, which have no vibronic structure and can not give the feature of the different isomers.Using the flashlamp pumped tunable Rh 6G dye laser, we was made the selective excitation for the electronic-vibronic levels of the hematoporphyrin in the ethanal at 77K. In experiment, the laser linewidth taken is lager than the homogeneous linewidth and narrower than the inhomogeneous linewidth, in order to distinguish the different feature of the isomer. The results show that four narrowed peaks appear in the region of 0-0 transition for different excitative wavelength. It is possible that these peaks belong to isomer molecules with the electronic vibranica transition frequency as consistent with the laser excitative freguency. Since the vibronic levels of the different molecules superposed each other,several peaks simultaneously was observed in the region of the 0-0 transition. The position of different 0-0 transition peaks are relatively shifted from difference of the structure symmetry. Two peaks appeared in the fluorescence spectra at 77K belong to two main kinds of the isomer.In (1N) HCl solution, since the structural symetry increased the fluorescent spectra occured blue-shift. Thus 0-0 transition band lies on the region of 570-600nm, which just consistent with the tunable range of the Rh 6G dye laser. The structural fluorescent spectra are occured by laser selective excitation in the region of 0-0 transition. When excitation at λ=591.3nm the vibronic structure is clear but as the excitative wavelength shortened the structure disappears stepwise. This phenomenon can. be interpret as overlaping of the pure electronic transition with the phonon sideband in the shorter wavelength side of the 0-phonon line. The experimental results indicated that the electronic-phonon coupling of the HPD in these solvent is not very strong.110|75|0更新时间：2020-08-11
- 摘要：The emission of chlorophyll was observed first in 1934 by Robinowitch and the earliest systemtic spectroscopic studies of porphyrin were made by Stern and coworkers in the same year. The luminescent property of por phyrins was paid more and more attention in recent several decades.There are extensive interactions between the π electrons of the porphyrin ring and the electron of the central metal atom and its ligands. It is found that the interactions are sensitive to the electronic structure of the central metal ion. This paper reports the photovoltaic spectra of meso-te-traphenylporphyrin(TPP), mesotetra (-4-N-pyridyl-) porphyrin(TPyP) and of their zinc (Ⅱ) copper (Ⅱ) complexes in solid state, and compares with the optical absorption and fluorescence spectra of these compounds in chloroform. Furthermore the same work has been done for chlorophyll-a (Chla), phoeophytin-a (Phn-a) zinc(Ⅱ)-phceophytin a (Zn-Phn-a), copper(Ⅱ)-phoeophytin-a(Cu-Phn-a) in acetone. The optical spectra of TPP and TPyP are known to be attributed entirly to π-π* transitions of the ring with the central metal contributing electronic or spin-orbit perturbation, the spin-orbit perturbation cause the large variations in fluorescence spectra. It seems to be that such perturbation makes the photovoltaic spectra different.We also found that the substituent in porphyrin ring has little effect on porphyrin spectra.112|90|0更新时间：2020-08-11
- 摘要：In the experimental process dealing with the diagnosis of early carci- noma by fluorescence sensitizatioh method,we observed several biologic mac-romolecules which possess the sensitization effect to the fluorescence of the derivatives of hematoporphyrin (HPD). By means of isolated simulate experiment, the energy transmission between bovine albumin (BALB) and HPD has been confirmed, the energy donor was BALB and the energy recipient was HPD. The transmission efficiency has been evaluated and the types of interaction between BALB and HPD were discussed.107|54|0更新时间：2020-08-11
- 摘要：Many studies have been made on the luminescence of chla solution, but the results obtained were often influenced by different experimental conditions. In these, data is relatively difference re-absorption and re-emission of the sample on the luminescence of chla solution was discorvered by us, that influenced very much peaks and intensity of the luminesence in chla solution, but that was diminished by method excited surface layer of the sample. This paper report luminescences of chla solution in ethanol and n-hexane on the different concentration (see Table 1). The resultsshowed same peaks of the luminescence at 663nm and 720nm in chla solution of weeker concentration in ethanol and n-hexane. That appeared same centre of the luminescence excist in both of chla solution in ethanol and n-hexane chla solution in the n-hexane in the concentration of 1×10-5M showed the quenching of the luminescence. But chla solution in ethanol showed not apparent regard to concentration qunching of the luminescence (see Fig. 1). Concentration quenching of the luminescence was explaned by the exci plex of chla produced in chla solusion due to interaction of both between activated chla molecule and diactivated chla molecule (see Fig.2). Re-absorption and re emission of the luminescence in chla solution was measured, where different range of the sample was passed the luminescence due to different site of the sample was excited by Ar-laser 488nm. Peak of the luminescence on chla solution at 15000cm-1 in 1×10-7M in ethanol shifed 50cm-1. So that re-absorption and re-emission was must noticed in the study on energe spectra of chla molecule.120|67|0更新时间：2020-08-11
- 摘要：The bioluminescent spectra of six species of marine luminous bacteria in vivo were reserched. They are Vibrio orientalis, V.fischeri, V, splendi-dus biotype Ⅰ,Ⅴ.harvyi, Photobacterium phosphoreum and P.leiognathi. Two strains were selected from each of these species respectively for this studying. It was found that their maximun emission peaking of biolumines cence spectra were between 474-485nm. All λmax of Vibrio spp. were bet ween 482-485nm, and all λmax of Photobacterium spp. were between 474-480nm. The bioluminescence spectra of Vibrio were different from Pbolcba-cterium. The maximun emission peaking of spectra of Viobrio orientalis were at 484±1nm.138|57|0更新时间：2020-08-11
- 摘要：When the hydrophobic probe 1-anilino-8-naphthalenesulfonate (1.8 ANS) is bound to Hemorrhagin-1 (A2H-1) from A.Acutus venom, its excitation and emission maxima are at 370nm and 470nm respectively. There is a hydrophobic region in A2H-1. Kd=1.53×10-5M, n=1.43. 1.8ANS does not inhibit hemorrhagic activity of A2H-1.Intensity of fluorescence emission of AaH-l-ANS is sensitive to the PH, EDTA, and temperature. The hemorrhagic activity of A2H-1 in these conditions shows corresponding changes.Energy transfer from Trp residus of A2H-1 to the bound ANS is observed. The efficency of energy transfer is 0.523. The Trp residus may be situated in hydrophobic region.Change of comformation of hydrophobic region of A2H-1 results in the change of hemorrhagic activity.108|49|0更新时间：2020-08-11
- 摘要：1,4-Bis [5'-(2'-phenyl oxazolyl)]benzene and seven of its bis 2'-(3"-substituted phenyl) derivatives reported in this paper are all new compounds except the parent ones.Their A max of UV spectra and fluorescence spectra, fluorescence quantum yields, as well as laser conversion efficiency are taken. Their IR and mass spectra are also recorded.94|25|0更新时间：2020-08-11
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