- Anion sensors based on β,β′-disubstituted porphyrin derivatives
-
The synthesis of a disulfonamide appended porphyrin receptor (1) for anionic guests is presented. The distinct attribute of the receptor, compared to other porphyrin based receptors, centers on the attachment of the anion binding site to the porphyrin chr
- Starnes, Stephen D.,Arungundram, Sailaja,Saunders, Colene H.
-
-
Read Online
- Long-lived, directional photoinduced charge separation in RuII complexes bearing laminate polypyridyl ligands
-
RuII complexes incorporating both amide-linked bithiophene donor ancillary ligands and laminate acceptor ligands; dipyrido[3,2-a:2′, 3′-c]phenazine (dppz), tetrapyrido[3,2-a:2′,3′-c: 3′′,2′′-h:2′′′,3′′′- j]phenazine (tpphz), and 9,11,20,22-tetr
- Majewski, Marek B.,De Tacconi, Norma R.,MacDonnell, Frederick M.,Wolf, Michael O.
-
-
Read Online
- Synthesis and photophysics of a red-light absorbing supramolecular chromophore system
-
In search of supramolecular antenna systems for light-harvesting applications, we report on a short and effective synthesis of a fused NDI-zinc-salphen-based chromophore (salphen = bis-salicylimide phenylene) and its photophysical properties. A supramolec
- Rombouts, Jeroen A.,Ravensbergen, Janneke,Frese, Raoul N.,Kennis, John T. M.,Ehlers, Andreas W.,Slootweg, J. Chris,Ruijter, Eelco,Lammertsma, Koop,Orru, Romano V. A.
-
p. 10285 - 10291
(2014/08/18)
-
- DNA-binding and photocleavage studies of ruthenium(II) complexes containing asymmetric intercalative ligand
-
A novel asymmetric ligand 2-(pyridine-2-yl)-1-H-imidazo[4,5-i]dibenzo[2,3- a:2′,3′-c]phenazine (pidbp) and its ruthenium complexes [Ru(L) 2(pidbp)]2+ (L = bpy (2, 2′- bipyridine), phen (1, 10 - phenanthroline)), have been synthesized
- Liu, Xue-Wen,Chen, Yuan-Dao,Li, Lin,Lu, Ji-Lin,Zhang, Da-Shun
-
scheme or table
p. 554 - 561
(2012/02/05)
-
- DERIVATIVES OF PHENAZINE USEFUL TO TREAT CANCER
-
The present invention relates to derivatives of phenazine having a general formula (I) for use as an agent for treating cancer.
- -
-
Page/Page column 16
(2011/10/13)
-
- Derivatives of phenazine useful to treat cancer
-
The present invention relates to derivatives of phenazine having a general formula (I) as follows: for use as an agent for treating cancer.
- -
-
Page/Page column 9
(2011/10/12)
-
- Substituent effect on the electronic properties of pyrazino[2,3-g] quinoxaline molecules
-
We report the synthesis and characterization of pyrazino[2,3-g]quinoxaline derivatives with a systematic change in the substituents at the 2, 3, 7 and 8 positions and with or without 2-thienyl at the 5 and 10 positions to study the substituent effect and quinoid character of such a system. We performed density functional theory calculations using the B3LYP functional and 6-31G* basis set under the geometry optimization condition, together with the resonance effect of a valence bond theory to understand the electronic structures of these molecules. It was found that a combination of conjugation and cross-conjugation effects is responsible for the observed trends in their electronic properties, thus giving insights into designing molecules utilizing such effects.
- Tam, Teck Lip,Zhou, Feng,Li, Hairong,Yu Pang, Jane Chieh,Lam, Yeng Ming,Mhaisalkar, Subodh G.,Su, Haibin,Grimsdale, Andrew C.
-
experimental part
p. 17798 - 17804
(2012/04/23)
-
- Novel quinoxalinophenanthrophenazine-based molecules as sensors for anions: synthesis and binding investigations
-
The design and synthesis of two novel quinoxalinophenanthrophenazine-based anion sensors are reported. Binding studies of these sensors with an array of mono- and polyatomic anions using UV-vis, fluorescence, and NMR titrations have shown 1:1 and 1:2 sens
- Raad, Farah S.,El-Ballouli, Ala'a O.,Moustafa, Rasha M.,Al-Sayah, Mohammad H.,Kaafarani, Bilal R.
-
scheme or table
p. 2944 - 2952
(2010/06/16)
-
- A core-substituted naphthalene diimide fluoride sensor
-
"Chemical Equation Presented" The synthesis and characterization of a highly fluorescent core-substituted naphthalene diimide sensor (φ = 0.34) bearing a bis-sulfonamide group is described. The compound shows a unique selectivity and reactivity for the fl
- Bhosale, Sheshanath V.,Bhosale, Sidhanath V.,Kalyankar, Mohan B.,Langford, Steven J.
-
supporting information; experimental part
p. 5418 - 5421
(2010/03/03)
-
- Synthesis of amino- and bis(bromomethyl)-substitued bi- and tetradentate N-heteroaromatic ligands: Building blocks for pyrazino-functionalized fullerene dyads
-
In this paper we describe the synthesis of amino- and bis(bromomethyl)- substituted derivatives of phenanthrofine (phen), pyrazino[2,3-f]-phenanthroline (pphen), dipyrido[3,2-a:2′,3′-c]phenazine (dppz), pyrazino[2,3-i]dipyrido[3,2-a:2′,3′-c]phenazine, 2,3-bis(2-pyridyl)pyrazine (dpp), 2,3-bis(2-pyridyl)quinoxaline (dpq) and 7,8-bis(2-pyridyl)pyrazino[2,3-g]quinoxaline. These substituted bi- and tetradentate N-heteroaromatic ligands are potential synthons for the preparation of the fullerene ligands 4-9. The diketones, 1,10-phenanthroline-5,6-dione 11a (phendione), 2,2-pyridyl 11b and 1,4-dibromo-2,3-butanedione 33 were used as starting materials. Phendione was converted into the phendiamine 13 by a two-step synthesis via the dioxime of the diketone 11a. Amino-substituted dppz and dpq derivatives were obtained by the reduction of the corresponding nitro compounds that were obtained by the Schiff base condensation of the diketones 11a and 11b and the appropriate o-phenylenediamine derivatives. An alternative synthetic route to the diamines 20a and 20b by detosylation of the diamino-substituted dppz and dpq ligands is also presented. Synthesis of the bis(bromomethyl)-substituted pphen, dpp, dppz and dpq derivatives was performed by the photochemical addition of bromine. Alternatively, synthesis of the bis(bromomethyl)-substituted pphen, pdppz and pdpq is also possible by the condensation of 1,4-dibromo-2,3-butanedione 33 and phendiamine or the diamino-substituted dppz and dpq derivatives. The latter two compounds can be also prepared by the condensation of diketones 11a and 11b with 6,7-diamino-2,3-bis(bromomethyl)-quinoxaline. Although the synthesis of some dppz and dpq ligands is already published, we herein present improved or alternative synthetic strategies leading to higher yields and/ or higher purity of these N-heteroaromatic ligands. Wiley-VCH Verlag GmbH & Co. KGaA, 2006.
- Kleineweischede, Andreas,Mattay, Jochen
-
p. 947 - 957
(2007/10/03)
-
- Surface-rolling molecules
-
Design, syntheses, and testing of new, fullerene-wheeled single molecular nanomachines, namely, nanocars and nanotrucks, are presented. These nanovehicles are composed of three basic components that include spherical fullerene wheels, freely rotating alkynyl axles, and a molecular chassis. The use of spherical wheels based on C60 and freely rotating axles based on alkynes permits directed nanoscale rolling of the molecular structure on gold surfaces. The rolling motion observed by STM resembles the same motion performed by macroscopic entities in which rolling occurs perpendicular to the axles. A new synthesis methodology, in situ ethynylation of fullerenes, was developed for the realization of the fullerene-wheeled molecular machines. Four generations of the fullerene-wheeled structures were developed, and the latest fourth generation nanocar, 3b, along with three-wheeled triangular compounds, 4a and 4b, provided definitive evidence for fullerene-based wheel-like rolling motion, not stick-slip or sliding translation. The studies here underscore the ability to control directionality of motion in molecular-sized nanostructures through precise molecular design and synthesis.
- Shirai, Yasuhiro,Osgood, Andrew J.,Zhao, Yuming,Yao, Yuxing,Saudan, Lionel,Yang, Hanbiao,Yu-Hung, Chiu,Alemany, Lawrence B.,Sasaki, Takashi,Morin, Jean-Francois,Guerrero, Jason M.,Kelly, Kevin F.,Tour, James M.
-
p. 4854 - 4864
(2007/10/03)
-