نتایج جستجو برای: anthracene

تعداد نتایج: 4069  

2010
Kumaresh Ghosh Tanushree Sen

Anthracene-based adenines 1 and 2 have been designed and synthesized, and their metal ion recognition properties have been established fluorometrically. Both molecules exhibit Cu²⁺ induced ON-OFF type signaling patterns over the other representative metal ions studied. Compound 1 exhibits 97% quenching of emission in the presence of Cu²⁺ whilst derivative 2 shows 81% quenching under similar exp...

2011
Jian-Rong Han Wei Wang Xiao-Li Zhen Xia Tian Shou-Xin Liu

In the title compound, C(22)H(20)N(+)·Cl(-), the anthracene system makes a dihedral angle of 72.65 (4)° with the benzene ring. The C-N-C-C torsion angles in the chain connecting the benzene ring and anthracene system are 52.24 (15) and -170.73 (11)°. The crystal structure is stabilized by inter-molecular N-H⋯Cl and C-H⋯Cl hydrogen bonds, which link the mol-ecules into tetra-mers about inversion...

2012
Sanaz Khorasani Manuel A. Fernandes

In the mol-ecular structure of title compound, C(18)H(13)NO(2), the succinimide ring is orientated away from the plane of the anthracene moiety by 71.94 (4)°. The crystal structure features three different types of inter-molecular inter-actions, viz. C-H⋯O, C-H⋯π and π-π bonds. Mol-ecules along the b axis stack on each other as a result of π-π inter-actions which have a centroid-centroid distan...

Journal: :Chemical communications 2006
Guang Zhu Kevin E Janak Gerard Parkin

Oxidative addition of H2 and D2 to the anthracene complex (eta6-AnH)Mo(PMe3)3 giving (eta4-AnH)Mo(PMe3)3X2 (X = H, D) is characterized by a normal equilibrium isotope effect (KH/KD > 1) at temperatures close to ambient; calculations on (eta4-AnH)Mo(PH3)3H2 indicate that this is a consequence of relatively low energy Mo-H vibrational modes.

Journal: :Molecules 2008
Wei Zhang Hong Ma Lipeng Zhou Zhiqiang Sun Zhongtian Du Hong Miao Jie Xu

The oxidative dehydrogenation of dihydroarenes catalyzed by 2,3-dichloro-5,6-dicyano-benzoquinone(DDQ) and NaNO(2) with dioxygen is reported. The combination of DDQ and NaNO(2) showed high efficiency and high selectivity, compared with other benzoquinones and anthraquinones, e.g., >99% conversion of 9,10-dihydroanthracene with 99% selectivity for anthracene can be obtained at 120 degrees C unde...

2013
Paweł Niedziałkowski Elżbieta Wnuk Anna Wcisło Damian Trzybiński

In the centrosymmetric title compound, C24H26N2O2, the piperidine ring adopts a chair conformation and is inclined at a dihedral angle of 37.5 (1)°to the anthracene ring system. In the crystal, adjacent mol-ecules are linked through C-H⋯π and π-π [centroid-centroid distances = 3.806 (1) Å] inter-actions, forming a layer parallel to the bc plane.

2012
Hao-Wei Wang Jun Ren Wen-Bo Ye Jia-Xiang Yang

In the title compound, C(30)H(20)N(2), the anthracene ring system is approximately planar [maximum deviation = 0.035 (2) Å] and is nearly perpendicular to the central pyridine ring, making a dihedral angle of 75.73 (7)°. The terminal pyridine ring and the phenyl ring are oriented at dihedral angles of 8.11 (10) and 13.22 (10)°, respectively, to the central pyridine ring.

Journal: :Chemical communications 2005
Go Nishimura Yasuhiro Shiraishi Takayuki Hirai

Simple polyamines, L1-L3, bearing anthracene and benzophenone units at the respective ends, behave as a fluorescent pH sensor applicable to wide-range pH detection.

Journal: :Chemical communications 2015
Sooyeon Kim Mamoru Fujitsuka Norimitsu Tohnai Takashi Tachikawa Ichiro Hisaki Mikiji Miyata Tetsuro Majima

We report a substitution of 9-phenylanthracenyl group into rhodamine derivatives that can induce the J-aggregate formation of rhodamine moieties in the aqueous solution upon the addition of a halide ion. From X-ray crystallographic analysis, the dramatic red-shift in the absorption band (i.e. app. 100 nm) originates from the cooperative slipped-stacking of rhodamine and anthracene molecules.

2011
Aurelien Crochet Katharina M. Fromm Vanya Kurteva Liudmil Antonov

The title compound, C(21)H(16)N(2)O, has an E-conformation about the diazene N=N bond. It is reasonably planar with the phenyl ring being inclined to the mean plane of the anthracene moiety [planar to within 0.077 (3) Å] by 6.43 (10)°. The crystal structure is stabilized by C-H⋯π and weak π-π inter-actions [centroid-centroid distances of 3.7192 (16) and 3.8382 (15) Å], leading to the formation ...

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