X-ray excited ultralong room-temperature phosphorescence for organic afterglow scintillators

2020 ◽  
Vol 56 (88) ◽  
pp. 13559-13562
Author(s):  
Lele Tang ◽  
Jie Zan ◽  
Hao Peng ◽  
Xi Yan ◽  
Ye Tao ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Room Temperature ◽  
Lone Pair ◽  
Room Temperature Phosphorescence ◽  
X Ray ◽  
Lone Pair Electron

An X-ray excited organic afterglow scintillator is realized by embedding lone-pair electron involved n–π* transitions and charge transfer characters into H-aggregations.

Long lifetime phosphorescence and X-ray scintillation of chlorobismuthate hybrids incorporating ionic liquid cations

2021 ◽  
Author(s):  
Jian-Ce Jin ◽  
Yang-Peng Lin ◽  
Yi-Heng Wu ◽  
Liaokuo Gong ◽  
Nan-Nan Shen ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Room Temperature ◽  
Room Temperature Phosphorescence ◽  
X Ray ◽  
Long Lifetime

Two chlorobismuthate hybrids incorportating ionic liquid cations (ILCs) with second-level room-temperature phosphorescence (RTP) were obtained, namely [Emim]BiCl4(bp2do) (1) and [Emmim]BiCl4(bp2do) (2) (Emim = 1-ethyl-3-methylimidazolium, Emmim = 1-ethyl-2,3-dimethylimidazolium, bp2do = 2,2'-bipyridyl-1,1'-dioxide)....

CHARGE-TRANSFER REACTION OF BUTATRIENE: FORMATION OF DIHYDRONAPHTHALENE DERIVATIVE

2006 ◽  
Vol 20 (25n27) ◽  
pp. 4619-4624 ◽  
Author(s):  
NAZRUL ISLAM ◽  
MASAO TSUKAYAMA ◽  
YASUHIKO KAWAMURA
Keyword(s):  
Charge Transfer ◽  
Room Temperature ◽  
Transfer Reaction ◽  
Addition Reaction ◽  
Crystalline Material ◽  
Charge Transfer Reaction ◽  
Protic Solvent ◽  
Detailed Structure ◽  
X Ray ◽  
X Ray Crystallography

The charge-transfer reaction of tetraarylbutatriene 1 with tetracyanoethene (TCNE) in dichloromethane at room temperature was studied and we found a novel addition reaction. A red crystalline material 2 was isolated as an intermediate product which is converted slowly into dihydronaphthalene derivative 3 in dichloromethane but rapidly in protic solvent. The structure of the compounds was determined by X-ray crystallography. The detailed structure and the plausible reaction mechanism have also been discussed.

Radikal-markierte Metallocene (M = Fe, Co). Metallocenylen verbrückte Bis(3-imidazolin-l-oxyle) / Radical Labeled M etallocenes (M = Fe, Co). M etallocenylene B ridged B is(3-im idazolin-l-oxyls)

2001 ◽  
Vol 56 (7) ◽  
pp. 563-570
Author(s):  
Harald Dialer ◽  
Kurt Polbom ◽  
Wolfgang Beck
Keyword(s):  
Charge Transfer ◽  
Radical Anion ◽  
Room Temperature ◽  
Lithium Salt ◽  
Charge Transfer Complex ◽  
Magnetic Measurements ◽  
X Ray Diffraction ◽  
X Ray ◽  
A Charge ◽  
Different Sources

Abstract Radical Labeled M etallocenes (M = Fe, Co). M etallocenylene B ridged B is(3-im idazolin-l-oxyls) The addition of the lithium salt of the silyl protected hydroxylamine 1-hydroxy-2,2,4,5,5-pentamethyl-3-imidazoline (1) to 6 ,6 -dimethylfulvalene gives the lithium cyclopentadienide 2 from which the 1,1 '-substituted ferrocene and cobaltocinium derivatives 3 and 4 were obtained. Deprotection and oxidation of 3 and 4 afford the metallocenylene bridged bis(3-imidazolin-l-oxyls) 5 and 7. The ferrocene bridged diradical 5 forms with DDQ a charge transfer complex 8 . The complexes 5 and 7 were characterized by X-ray diffraction and by their EPR spectra. Magnetic measurements show at room temperature two independent spins for 5 and 7 and four unpaired electrons for 8 , the latter arising from three different sources [Fe(III) low spin d5, two nitroxides and DDQ- radical anion].

scholarly journals Synthesis of Silane-Based Poly(thioether) via Successive Click Reaction and Their Applications in Ion Detection and Cell Imaging

Polymers ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 1235 ◽  
Author(s):  
Zhiming Gou ◽  
Xiaomei Zhang ◽  
Yujing Zuo ◽  
Weiying Lin
Keyword(s):  
Room Temperature ◽  
Cell Imaging ◽  
Click Reaction ◽  
Lone Pair ◽  
Living Cells ◽  
Blue Fluorescence ◽  
Ion Detection ◽  
Fluorescent Properties ◽  
Lone Pair Electron ◽  
Sulfhydryl Compounds

A series of poly(thioether)s containing silicon atom with unconventional fluorescence were synthesized via successive thiol click reaction at room temperature. Although rigid π-conjugated structure did not exist in the polymer chain, the poly(thioether)s exhibited excellent fluorescent properties in solutions and showed visible blue fluorescence in living cells. The strong blue fluorescence can be attributed to the aggregation of lone pair electron of heteroatom and coordination between heteroatom and Si atom. In addition, the responsiveness of poly(thioether) to metal ions suggested that the selectivity of poly(thioether) to Fe3+ ion could be enhanced by end-modifying with different sulfhydryl compounds. This study further explored their application in cell imaging and studied their responsiveness to Fe3+ in living cells. It is expected that the described synthetic route could be extended to synthesize novel poly(thioether)s with superior optical properties. Their application in cell imaging and ion detection will broaden the range of application of poly(thioether)s.

Lewis-Base Adducts of Lead(II) Compounds. XIII. Synthetic, Structural and Theoretical Studies of Some 2:1 Adducts of 1,10-Phenanthroline With Lead(II) Oxoanion Salts

1996 ◽  
Vol 49 (10) ◽  
pp. 1099 ◽  
Author(s):  
I Bytheway ◽  
LM Engelhardt ◽  
JM Harrowfield ◽  
DL Kepert ◽  
H Miyamae ◽  
...  
Keyword(s):  
Room Temperature ◽  
Electron Pair ◽  
Lone Pair ◽  
Coordination Complexes ◽  
Lewis Base ◽  
Theoretical Studies ◽  
Hydrogen Atoms ◽  
X Ray ◽  
Structure Determinations ◽  
Good Agreement

Syntheses and room-temperature single-crystal X-ray structure determinations are recorded for 2 : 1 adducts of the N,N′- bidentate aromatic base 1,10-phenanthroline (' phen ') with lead(II) nitrate and perchlorate . [( phen )2Pb(NO3)2] is monoclinic, P21/n, a 18.104(4), b 7.733(2), c 16.688(3) Ǻ, β 98.17(2)′, Z = 4, R being 0.036 for No = 3381 independent 'observed' reflections, while [( phen )2Pb(ClO4)2] is triclinic, Pī , a 13.134(4), b 12.342(4), c 7.771(3) Ǻ, α 94.34(3), β 101.49(3), γ 93.91(2)′, Z = 2, R being 0.056 for No 3473. The two systems are mononuclear with eight-coordinate PbN4O4 coordination environments incorporating a pair of O,O'- bidentate anions. Stereochemical calculations, based on valence shell electron pair repulsion (VSEPR) theory, have been performed for coordination complexes of the general type [M( bidentate A)n( bidentate B)4-n] (n = 1 or 2) and for several types of lead(II) complex thought to contain sterically active lone pairs of electrons. Expected deviations from ideal stereochemistry have been successfully predicted and for many of the complexes studied there is good agreement between the observed and calculated stereochemistry. In the particular case of these lead(II)/ phen complexes it appears to be necessary to invoke steric interactions of the a-hydrogen atoms in addition to a sterically active lone pair.

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