Proton phototransfer performance for 2-heteryloxazoles

1990 ◽  
Vol 26 (2) ◽  
pp. 155-160
Author(s):  
S. I. Druzhinin ◽  
I. V. Troyanovskii ◽  
S. A. Krashakov ◽  
B. M. Uzhinov
Keyword(s):  
Proton Phototransfer

Effect of the proton phototransfer reaction on the laser radiation of heteroaryloxazoles

1988 ◽  
Vol 48 (3) ◽  
pp. 264-269
Author(s):  
S. I. Druzhinin ◽  
S. A. Krashakov ◽  
I. V. Troyanovskii ◽  
A. I. Akimov ◽  
L. Sh. Afanasiadi ◽  
...  
Keyword(s):  
Laser Radiation ◽  
Proton Phototransfer

scholarly journals 2-(benzimidazol-2-yl)-3-hydroxychromone derivatives: spectroscopic properties and a possibile alternative intramolecular proton phototransfer

2008 ◽  
Vol 6 (3) ◽  
pp. 443-449 ◽  
Author(s):  
D. Svechkarev ◽  
G. Karpushina ◽  
L. Lukatskaya ◽  
A. Doroshenko
Keyword(s):  
Excited State ◽  
Proton Transfer ◽  
Experimental Evidence ◽  
Spectroscopic Properties ◽  
Intramolecular Proton Transfer ◽  
Fluorescent Properties ◽  
Theoretical Possibility ◽  
Proton Phototransfer

AbstractThree 2-(benzimidazol-2-yl)-3-hydroxychromone derivatives were synthesized. Their spectroscopic and fluorescent properties, due to excited state intramolecular proton transfer (ESIPT) from OH to carbonyl, were studied. Theoretical possibility of an alternative intramolecular H-bonding and experimental evidence for such behavior are discussed.

Proton phototransfer kinetics in a solution of 3-metoxybenzanthrone in a polar aprotic solvent with weak donor additives

1996 ◽  
Vol 63 (2) ◽  
pp. 153-157
Author(s):  
I. M. Gulis ◽  
A. I. Komyak ◽  
Yu. I. Miksyuk ◽  
V. A. Tsvirko
Keyword(s):  
Aprotic Solvent ◽  
Polar Aprotic Solvent ◽  
Proton Phototransfer

scholarly journals Derivatives of 1,3,5 triaryl-2-pyrazoline with additional heterocyclic moieties in position 1 as potential fluorescent chemosensing compounds for detection of polyvalent metals cations

2018 ◽  
Keyword(s):  
Heavy Metal ◽  
Fluorescence Quenching ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Spectral Characteristics ◽  
Luminescent Properties ◽  
Proton Transfer Reaction ◽  
Ortho Position ◽  
Reaction Rate Constants ◽  
Proton Phototransfer

A series of 1,3,5-triaryl-2-pyrazoline derivatives with pyridine or 8'-hydroxyquinoline fragments in position 1 have been synthesized, some of which also contain a hydroxy group in the ortho-position of benzene ring-3, which makes possible the their OH-group proton phototransfer reaction to the nitrogen atom of pyrazoline cycle. The nitrogen atoms in molecules of the investigated compounds form chelate cavities, binding of the ions of polyvalent metals to which should lead to changes in the spectral characteristics. The spectral-luminescent properties of the synthesized compounds in solvents of different polarity and their interaction with salts of several polyvalent metals in acetonitrile were investigated. The proton phototransfer reaction was shown to result in significant fluorescence quenching, the most prominent for the derivative with the hydroxyquinoline fragment in position 1 of pyrazoline cycle. The proton transfer reaction rate constants vary within the interval of 2-4∙109 s-1 in aprotic solvents of different polarity. The prospects for application of the synthesized derivatives as fluorescent chemosensor compounds for the analysis of polyvalent metals were examined. In most of the studied cases, their interaction with heavy metal ions led to decrease of fluorescence intensity, however for compounds with intramolecular proton phototransfer reaction, no significant quenching by heavy metal ions was observed. The exception was the mercury ions, in the interaction with which compounds with proton phototransfer reaction demonstrated intensity redistribution of their two emission bands on the background of their general fluorescence quenching. The latter circumstance indicates the possibility of application of the modern methods of ratiometric fluorescence detection for the analysis of Hg2+ ions with their help.

Proton phototransfer reactions in aprotic solvents

1974 ◽  
Vol 20 (3) ◽  
pp. 377-379
Author(s):  
B. M. Uzhinov ◽  
I. Yu. Martynov ◽  
M. G. Kuz'min
Keyword(s):  
Aprotic Solvents ◽  
Proton Phototransfer

Picosecond spectroscopy of intermolecular proton phototransfer

1986 ◽  
Vol 16 (7) ◽  
pp. 945-950
Author(s):  
G M Esayan ◽  
O V Kalaĭdzidis ◽  
L B Rubin
Keyword(s):  
Picosecond Spectroscopy ◽  
Proton Phototransfer

Excited-state proton phototransfer in the (3-methyl-7-azaindole)-(7-azaindole) heterodimer

2006 ◽  
Vol 419 (1-3) ◽  
pp. 164-167 ◽  
Author(s):  
Javier Catalán ◽  
Cristina Díaz ◽  
José L.G. de Paz
Keyword(s):  
Excited State ◽  
Proton Phototransfer

Static and dynamic mechanisms of proton phototransfer reactions in the system 1-azaphenanthrene-acetic acid in aliphatic alcohols

1980 ◽  
Vol 33 (6) ◽  
pp. 1362-1366
Author(s):  
V. L. Shapovalov ◽  
A. B. Demyashkevich ◽  
M. G. Kuz'min
Keyword(s):  
Acetic Acid ◽  
Aliphatic Alcohols ◽  
Dynamic Mechanisms ◽  
Proton Phototransfer ◽  
System 1

Picosecond dynamics of proton phototransfer reactions in polar solutions of organic dyes

1992 ◽  
Vol 56 (1) ◽  
pp. 39-42
Author(s):  
I. M. Gulis ◽  
A. I. Komyak ◽  
Yu. I. Miksyuk ◽  
V. A. Tsvirko
Keyword(s):  
Organic Dyes ◽  
Proton Phototransfer ◽  
Polar Solutions
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