Low-Temperature Spectra of the Analogues of 10-Hydroxybenzo[h]quinoline as an Indication of Barrierless ESIPT

2012 ◽  
Vol 116 (49) ◽  
pp. 12049-12055 ◽  
Author(s):  
Irena Deperasińska ◽  
Daniel T. Gryko ◽  
Elena Karpiuk ◽  
Bolesław Kozankiewicz ◽  
Artur Makarewicz ◽  
...  
Keyword(s):  
Low Temperature ◽  
Temperature Spectra

The Microscopic Structure Of Shallow Donors In Silicon Carbide

1996 ◽  
Vol 442 ◽  
Author(s):  
J.-M. Spaeth ◽  
S. Greulich-Weber ◽  
M. März ◽  
E. N. Kalabukhova ◽  
S. N. Lukin
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Temperature Dependence ◽  
Double Resonance ◽  
Epr Spectra ◽  
Electron Nuclear Double Resonance ◽  
Paramagnetic Resonance ◽  
Vacancy Pair ◽  
Temperature Spectra ◽  
Electron Paramagnetic

AbstractThe electronic structure of nitrogen donors in 6H-, 4H- and 3C-SiC is investigated by measuring the nitrogen hyperfine (hf) interactions with electron nuclear double resonance (ENDOR) and the temperature dependence of the hf split electron paramagnetic resonance (EPR) spectra. Superhyperfine (shf) interactions with many shells of 13C and 29Si were measured in 6H-SiC. The hf and shf interactions are discussed in the framework of effective mass theory. The temperature dependence is explained with the thermal occupation of the lowest valley-orbit split A1 and E states. It is proposed that the EPR spectra of P donors observed previously in neutron transmuted 6H-SiC at low temperature (<10K) and high temperature (>60K) are all due to substitutional P donors on the two quasi-cubic and hexagonal Si sites, whereby at low temperature the E state is occupied and at high temperature the A1 state. The low temperature spectra are thus thought not to be due to P-vacancy pair defects as proposed previously.

Estimation of low-temperature spectra behavior in Nd-doped Sc_2SiO_5 single crystal

2009 ◽  
Vol 34 (22) ◽  
pp. 3481 ◽  
Author(s):  
Lihe Zheng ◽  
Jun Xu ◽  
Liangbi Su ◽  
Hongjun Li ◽  
Qingguo Wang ◽  
...  
Keyword(s):  
Low Temperature ◽  
Single Crystal ◽  
Temperature Spectra

scholarly journals Thermal Stress, Aggregation of Chlorophyll-Protein Complexes, and Light-Dependent Recovery of PSII activity in Wheat Seedlings

2021 ◽  
Vol 68 (5) ◽  
pp. 867-872
Author(s):  
M. S. Khristin ◽  
T. N. Smolova ◽  
V. D. Kreslavski
Keyword(s):  
Low Temperature ◽  
Structural Changes ◽  
Protein Complexes ◽  
Red Light ◽  
Photochemical Activity ◽  
Wheat Seedlings ◽  
Psii Activity ◽  
Temperature Spectra ◽  
Chlorophyll Protein Complexes ◽  
Chlorophyll Protein

Abstract The dynamics of changes in the photochemical activity of photosystem II (PSII) and low-temperature spectra at 77 K in the first leaves of 11-day winter wheat plants Triticum aestivum L., as well as structural changes in chlorophyll-protein complexes (CPC) of thylakoid membranes during recovery after a short-term (20 min) heating at a temperature of 42°C, were studied. Changes in the Fv/Fm, F735/F695, and F735/F685 ratios indicate inhibition of PSII immediately after heating. Using nondenaturing electrophoresis, it was shown that the light-harvesting Chl a/b complex of PSII does not aggregate immediately after heating but after several hours, after 6 h the desagregation of CPC was observed, which was consistent with an increase in the Fv/Fm ratio upon recovery. The influence of temperature, intensity, and quality of light (white, blue, and red light) on the recovery of PSII activity and low-temperature fluorescence spectra was studied. It was concluded that the recovery is a photo-activated low-energy process, independent of photosynthesis, and the most effective in blue light.

Fine structure of the bands in the low-temperature spectra of sodium uranyl acetate

1982 ◽  
Vol 37 (5) ◽  
pp. 1277-1281 ◽  
Author(s):  
V. N. Boikov ◽  
A. N. Krasovskii ◽  
D. S. Umreiko
Keyword(s):  
Fine Structure ◽  
Low Temperature ◽  
Uranyl Acetate ◽  
Temperature Spectra

Studies on Low Temperature Spectra of Respiratory Pigments

1971 ◽  
Vol 69 (2) ◽  
pp. 355-362 ◽  
Author(s):  
Bunji HAGIHARA ◽  
Tetsutaro IIZUKA
Keyword(s):  
Low Temperature ◽  
Temperature Spectra

Low temperature spectra of the1B1u←1A1gtransition of C6H6, sym-C6H3D3and C6D6

1974 ◽  
Vol 28 (5) ◽  
pp. 1139-1144 ◽  
Author(s):  
E. Pantos ◽  
A.M. Taleb ◽  
T.D.S. Hamilton ◽  
I.H. Munro
Keyword(s):  
Low Temperature ◽  
Temperature Spectra
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