Abstract
Paramagnetic derivatives of tolan, anthracene, and terphenyl of the A - Sp - R ̇ type, where A is an aromatic group, R ̇ is a stable radical center, and Sp is a spacer, were synthesized. The electronic absorption and luminescence spectra of these compounds were examined. The introduction of the paramagnetic dihydroimidazole fragment causes a decrease (10 - 500-fold) in the quantum yield of luminescence compared to emission of the individual aromatic luminophore. The presence of a radical center (R ̇ ) in the (alkane) ̇+ / -̇ A - Sp - R ̇ radical-ionic pair leads to the disappearance or fast (nanoseconds) damping of the magnetic effect of luminescence arising upon recombination of these pairs.
| Original language | English |
|---|---|
| Pages (from-to) | 1409-1414 |
| Number of pages | 6 |
| Journal | Russian Chemical Bulletin |
| Volume | 49 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - 1 Jan 2000 |
| Externally published | Yes |
Fingerprint
Keywords
- Alkynes
- Anthracene
- Luminescence
- Magnetic effects
- Nitroxyl radicals
- Radical ions
- Terphenyl
- Tolan
ASJC Scopus subject areas
- Chemistry(all)
Cite this
Synthesis and properties of paramagnetic derivatives of linear and fused polyaromatic compounds. / Tretyakov, E. V.; Novikova, T. V.; Korolev, V. V.; Usov, O. M.; Vasilevsky, S. F.; Molin, Yu N.
In: Russian Chemical Bulletin, Vol. 49, No. 8, 01.01.2000, p. 1409-1414.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Synthesis and properties of paramagnetic derivatives of linear and fused polyaromatic compounds
AU - Tretyakov, E. V.
AU - Novikova, T. V.
AU - Korolev, V. V.
AU - Usov, O. M.
AU - Vasilevsky, S. F.
AU - Molin, Yu N.
PY - 2000/1/1
Y1 - 2000/1/1
N2 - Paramagnetic derivatives of tolan, anthracene, and terphenyl of the A - Sp - R ̇ type, where A is an aromatic group, R ̇ is a stable radical center, and Sp is a spacer, were synthesized. The electronic absorption and luminescence spectra of these compounds were examined. The introduction of the paramagnetic dihydroimidazole fragment causes a decrease (10 - 500-fold) in the quantum yield of luminescence compared to emission of the individual aromatic luminophore. The presence of a radical center (R ̇ ) in the (alkane) ̇+ / -̇ A - Sp - R ̇ radical-ionic pair leads to the disappearance or fast (nanoseconds) damping of the magnetic effect of luminescence arising upon recombination of these pairs.
AB - Paramagnetic derivatives of tolan, anthracene, and terphenyl of the A - Sp - R ̇ type, where A is an aromatic group, R ̇ is a stable radical center, and Sp is a spacer, were synthesized. The electronic absorption and luminescence spectra of these compounds were examined. The introduction of the paramagnetic dihydroimidazole fragment causes a decrease (10 - 500-fold) in the quantum yield of luminescence compared to emission of the individual aromatic luminophore. The presence of a radical center (R ̇ ) in the (alkane) ̇+ / -̇ A - Sp - R ̇ radical-ionic pair leads to the disappearance or fast (nanoseconds) damping of the magnetic effect of luminescence arising upon recombination of these pairs.
KW - Alkynes
KW - Anthracene
KW - Luminescence
KW - Magnetic effects
KW - Nitroxyl radicals
KW - Radical ions
KW - Terphenyl
KW - Tolan
UR - http://www.scopus.com/inward/record.url?scp=0034364821&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0034364821&partnerID=8YFLogxK
U2 - 10.1007/BF02495088
DO - 10.1007/BF02495088
M3 - Article
AN - SCOPUS:0034364821
VL - 49
SP - 1409
EP - 1414
JO - Russian Chemical Bulletin
JF - Russian Chemical Bulletin
SN - 1066-5285
IS - 8
ER -