Poly(1,2-phenylenevinylene)s Bearing Nitronyl Nitroxide and Galvinoxyl at the 4-Position:  π-Conjugated and Non-Kekulé-Type Polyradicals with a Triplet Ground State

1997 ◽  
Vol 30 (14) ◽  
pp. 3986-3991 ◽  
Author(s):  
Hiroyuki Nishide ◽  
Yasuhiro Hozumi ◽  
Takeshi Nii ◽  
Eishun Tsuchida
Keyword(s):  
Ground State ◽  
Nitronyl Nitroxide ◽  
Triplet Ground State

Ferromagnetic Chain Based on Verdazyl-Nitroxide Diradical

2020 ◽  
Author(s):  
Evgeny Tretyakov ◽  
Svetlana Zhivetyeva ◽  
Pavel Petunin ◽  
Dmitry Gorbunov ◽  
Nina Gritsan ◽  
...  
Keyword(s):  
Coupling Reaction ◽  
Cross Coupling ◽  
Ferromagnetic Coupling ◽  
Nitronyl Nitroxide ◽  
Triplet Ground State ◽  
One Dimensional ◽  
Cross Coupling Reaction ◽  
Palladium Catalyzed ◽  
Ferromagnetic Chain ◽  
High Yields

<p>Verdazyl-nitroxide diradicals were synthesized using the palladium-catalyzed cross-coupling reaction of the corresponding iodoverdazyls with a nitronyl nitroxide-2-ide gold(I) complex with high yields (up to 82%). The synthesized diradicals were found to be highly thermally stable and have a singlet (D<i>E</i><sub>ST</sub> » -64 cm<sup>–1</sup>) or triplet ground state (D<i>E</i><sub>ST</sub> ³ 25 and 100 cm<sup>–1</sup>), depending on which canonical hydrocarbon diradical type they belong to. Upon crystallization, triplet diradicals form unique one-dimensional (1D) spin <i>S</i> = 1 chains of organic diradicals with intrachain ferromagnetic coupling of <i>J</i>′/<i>k</i><sub>B</sub> from 3 to 6 K.</p>

scholarly journals A Class of Non-Kekulé Molecules with Low Excitation Energies

2007 ◽  
Vol 62 (11) ◽  
pp. 1433-1436
Author(s):  
Fritz Dietz ◽  
Nedko Drebov ◽  
Nikolai Tyutyulkov
Keyword(s):  
Molecular Orbital ◽  
Ground State ◽  
Excitation Energies ◽  
Triplet Ground State ◽  
Molecular Systems ◽  
Structural Principle

A class of non-Kekulé molecular systems with a new structural principle and low excitation energies or with a triplet ground state was investigated theoretically. The systems consist of a non-Kekulé monoradical, possessing a non-bonding molecular orbital linked in a specific way to another monoradical.

Paramagnetic resonance in the nickel Tutton salts

1952 ◽  
Vol 213 (1115) ◽  
pp. 459-473 ◽  
Keyword(s):  
Electric Field ◽  
Magnetic Anisotropy ◽  
Ground State ◽  
Absorption Lines ◽  
Crystalline Electric Field ◽  
Paramagnetic Resonance ◽  
Triplet Ground State ◽  
Tutton Salts ◽  
Splitting Factor ◽  
Rhombic Symmetry

The paramagnetic resonance spectra of five nickel Tutton salts have been analyzed at 290° K. The positions and intensities of the absorption lines are adequately explained by a crystalline electric field of rhombic symmetry. The triplet ground state is resolved into three singlets with an overall splitting of the order of 3 cm -1 , and the spectroscopic splitting factor g is found to be 2.25 ± 0.05. A comparison is made between the directly measured values of the magnetic anisotropy, and the values calculated using the resonance results.

Pyridine-substituted nitronyl nitroxide biradicals: a triplet (S = 1) ground state lasting out N-methylation

2006 ◽  
Vol 16 (42) ◽  
pp. 4146 ◽  
Author(s):  
Kenichi Hayakawa ◽  
Daisuke Shiomi ◽  
Tomoaki Ise ◽  
Kazunobu Sato ◽  
Takeji Takui
Keyword(s):  
Ground State ◽  
Nitronyl Nitroxide

scholarly journals A stable triplet diradical emitter

2021 ◽  
Author(s):  
Zhongtao Feng ◽  
Yuanyuan Chong ◽  
Shuxuan Tang ◽  
Yong Fang ◽  
Yue Zhao ◽  
...  
Keyword(s):  
Ground State ◽  
Triplet Ground State ◽  
Stable Molecule

Molecules with luminescence have been extensively investigated, but luminescence of a stable molecule with a triplet ground state has not been observed. Synthesis of boron-containing radicals have attracted lots of...

scholarly journals A Bis(μ-oxido)dinickel(III) Complex with a Triplet Ground State

2018 ◽  
Vol 130 (26) ◽  
pp. 7766-7769 ◽  
Author(s):  
Yuma Morimoto ◽  
Yusaku Takagi ◽  
Toru Saito ◽  
Takehiro Ohta ◽  
Takashi Ogura ◽  
...  
Keyword(s):  
Ground State ◽  
Triplet Ground State

Sulfamoyl nitrenes: singlet or triplet ground state?

2018 ◽  
Vol 54 (48) ◽  
pp. 6136-6139 ◽  
Author(s):  
Yan Lu ◽  
Hongmin Li ◽  
Manabu Abe ◽  
Didier Bégué ◽  
Huabin Wan ◽  
...  
Keyword(s):  
Triplet State ◽  
Ground State ◽  
Singlet State ◽  
Minimum Energy ◽  
Closed Shell ◽  
Low Energy ◽  
Energy Minimum ◽  
Triplet Ground State ◽  
Crossing Point

Two prototypical sulfamoyl nitrenes R2NS(O)2–N (R = H and Me) in the triplet state were generated via the closed-shell singlet state by passing a low-energy minimum energy crossing point (MECP).

Sign in / Sign up

Export Citation Format

Share Document