- Ligand Induced Anionic Cuprous Cyanide Framework for Cupric Ion Turn on Luminescence Sensing and Photocatalytic Degradation of Organic Dyes
-
A new microporous luminescent coordination polymer [(CH3)2NH2]·[Cu2(CN)3] (1) with channels occupied by dimethylamine cations was synthesized due to the inducing effect of 2-(2′-pyridyl)imidazole. Complex 1 exhibits bright-green emission in the solid state, and its emission intensity would be significantly enhanced, especially by DMAc and cupric ion after immersing the as-synthesized crystals of 1 into common organic solvents or methanol solutions of various metal ions. In addition, 1 exhibits photocatalytic activity for the degradation of RhB and MB under natural light and is stable during the photocatalysis process. Thus, 1 can act as a multifunctional material for selectively sensing of Cu2+ and effectively photocatalytic degradation of dyes.
- Xu, Xiao-Yan,Chen, Qiu-Cheng,Yu, Ya-Dong,Huang, Xiao-Chun
-
-
Read Online
- Silver(i) coordination chemistry: From 1-D chains to molecular rectangles
-
A series of silver(i) coordination compounds with the ligand 2-(4-pyridyl)imidazole 4-PyIm has been synthesized and crystallographically characterized in order to explore the role of counterions, solvents and ligand charge in the resulting supramolecular architectures. With perchlorate and hexafluorophosphate, two iso-structural 1-D coordination-polymers were obtained, but when changing the counterion to nitrate and using water as solvent, an unusual molecular rectangle composed of four ligands and four Ag(i) ions was obtained, and the assembly was controlled by hydrogen bonding via the anion and water molecules. Finally, when the ligand was deprotonated, the change in the number of binding sites (from two to three) was reflected in an increase in the coordination number for the silver ion.
- Abul Haj, Mohammad,Aakeroey, Christer B.,Desper, John
-
-
Read Online
- Multi-wall carbon nanotube supported manganese(III) porphyrin: An efficient and reusable catalyst for oxidation of 2-imidazolines with sodium periodate
-
The oxidation of 2-substituted imidazolines with sodium periodate catalyzed by tetrakis(p-aminophenyl)-porphyrinatomanganese(III) chloride, [Mn(TNH 2PP)Cl], supported on functionalized multi-wall carbon nanotubes is reported. A wide variety of 2-imidazolines were efficiently converted to their corresponding imidazoles by this catalytic system. When the same reaction was subjected to ultrasonic irradiation, the reaction times were reduced significantly and the product yields were increased. This catalyst could be reused several times without significant loss of activity. The effects of reaction parameters such catalyst amount, choice of solvent, and the effects of ultrasonic irradiation on the catalytic activity have been investigated.
- Kargar, Hadi,Moghadam, Majid,Mirkhani, Valiollah,Tangestaninejad, Shahram,Mohammadpoor-Baltork, Iraj,Rezaei, Simindokht
-
-
- Rapid and efficient biomimetic oxidation of 2-imidazolines to their corresponding imidazoles with NaIO4 catalyzed by Mn(salophen)Cl
-
Rapid and efficient oxidation of 2-substituted imidazolines with sodium periodate is reported. The Mn(III)-salophen/NaIO4 catalytic system efficiently converted 2-imidazolines to their corresponding imidazoles at room temperature in 2: 1, CH3CN/H2O mixture.
- Kargar, Hadi
-
experimental part
p. 863 - 866
(2011/06/25)
-
- Oxidation of 2-imidazolines to 2-imidazoles with sodium periodate catalyzed by polystyrene-bound manganese(III) porphyrin
-
In the present work, the dehydrogenation of 2-substituted imidazolines with sodium periodate in the presence of tetraphenylporphyrinatomanganese(III) chloride supported on polystyrene-bound imidazole, [Mn(TPP)Cl@PSI] is reported. A wide variety of 2-imidazolines were efficiently converted to their corresponding imidazoles by the [Mn(TPP)Cl@PSI]/NaIO4 catalytic system in a 1:2 CH3CN/H2O mixture under agitation with magnetic stirring. Ultrasonic irradiation enhanced the catalytic activity of this catalyst in the oxidation of 2-imidazolines and this led to shorter reaction times and higher product yields. This catalyst could be reused several times without significant loss of its catalytic activity.
- Kargar, Hadi,Moghadam, Majid,Mirkhani, Valiollah,Tangestaninejad, Shahram,Mohammadpoor-Baltork, Iraj,Naghipour, Mahmood
-
experimental part
p. 1463 - 1468
(2011/06/27)
-
- Dehydrogenation of 2-imidazolines with sodium periodate catalyzed by manganese(III) tetraphenylporphyrin
-
In the present work, dehydrogenation of 2-substituted imidazolines with sodium periodate in the presence of tetraphenylporphyrinatomanganese(III) chloride, [Mn(TPP)Cl], is reported. A wide variety of 2-imidazolines efficiently converted to their corresponding imidazoles by [Mn(TPP)Cl]/NaIO4 catalytic system at room temperature in 1:2, CH3CN/H2O mixture. The effect of reaction parameters such as kind of solvent and catalyst amount was also investigated.
- Kargar, Hadi,Moghadam, Majid,Mirkhani, Valiollah,Tangestaninejad, Shahram,Mohammadpoor-Baltork, Iraj,Nameni, Iman
-
experimental part
p. 2146 - 2148
(2011/04/24)
-
- A convenient procedure for preparing hetarylamides and their analogs by dehydrogenation of the corresponding imidazoles
-
Conditions of aromatization of 2-(2-hetaryl)imidazolines and their analogs with various dehydrogenating agents were examined. A new catalytic system, Pd/C-diphenyl oxide, was studied, and the optimal catalyst:imidazoline ratio ensuring formation of 2-substituted imidazoles in high yield was found.
- Aleksandrov,El'Chaninov
-
experimental part
p. 1024 - 1026
(2011/01/05)
-
- A simple and convenient one-pot method for the preparation of heteroaryl-2-imidazoles from nitriles
-
A simple, convenient and high-yielding one-pot method for the synthesis of 2-heterocycle-substituted imidazoles from the corresponding nitriles has been developed. The procedure is easily scaleable and the workup does not involve chromatography. This synthesis is also applicable to the preparation of imidazoles with electron-poor aryl substituents.
- Voss, Matthew E.,Beer, Catherine M.,Mitchell, Scott A.,Blomgren, Peter A.,Zhichkin, Paul E.
-
p. 645 - 651
(2008/04/12)
-
- Mild, efficient, and chemoselective dehydrogenation of 2-imidazolines, bis-imidazolines, and N-substituted-2-imidazolines with potassium permanganate supported on montmorillonite K-10
-
Different types of 2-imidazolines, bis-imidazolines, and N-substituted-2-imidazolines are efficiently oxidized to their corresponding imidazoles with potassium permanganate (KMnO4) supported on montmorillonite K-10 under very mild conditions. The procedure is very simple and no strict conditions were required. Selective dehydrogenation of 2-alkyl-2-imidazolines in the presence of 2-aryl-2-imidazolines is a noteworthy advantage of this method and can be considered as a useful practical achievement in these reactions.
- Mohammadpoor-Baltork, Iraj,Abdollahi-Alibeik, Mohammad
-
p. 110 - 114
(2007/10/03)
-
- Novel and chemoselective dehydrogenation of 2-substituted imidazolines with potassium permanganate supported on silica gel
-
Various types of 2-imidazolines are efficiently oxidized to the corresponding imidazoles using potassium permanganate supported on silica gel under mild conditions at room temperature. 2-Alkylimidazolines are selectively converted to their corresponding imidazoles in the presence of 2-arylimidazolines. Chemoselective oxidation of 2-imidazolines in the presence of other oxidizable functional groups such as sulfide, ether, aldehyde, acetal, and THP ether was also achieved by this reagent system.
- Mohammadpoor-Baltork, Iraj,Zolfigol, Mohammad Ali,Abdollahi-Alibeik, Mohammad
-
p. 8687 - 8690
(2007/10/03)
-
- Alumina supported potassium permanganate: An efficient reagent for chemoselective dehydrogenation of 2-imidazolines under mild conditions
-
An efficient method for the oxidation of 2-imidazolines to their corresponding imidazoles using KMnO4/Al2O3 under very mild reaction conditions is reported. Selective oxidation of 2-alkylimidazolines was also performed in the presence of 2-arylimidazolines and other functional groups such as sulfide, ether, aldehyde, acetal and THP ether. Potassium permanganate supported on alumina was found to be an efficient reagent system for dehydrogenation of 2-imidazolines to imidazoles under mild conditions at room temperature. Selective oxidation of 2-alkylimidazolines in the presence of 2-arylimidazolines was achieved using this reagent system. 2-Imidazolines were also selectively converted to their corresponding imidazoles in the presence of other oxidizable functional groups such as sulfide, ether, aldehyde, acetal and THP ether. The oxidation procedure described here is easy to carry out and does not require strict reaction conditions.
- Abdollahi-Alibeik, Mohammad,Mohammadpoor-Baltork, Iraj,Zolfigol, Mohammad Ali
-
p. 6079 - 6082
(2007/10/03)
-
- Novel, mild and chemoselective dehydrogenation of 2-imidazolines with trichloroisocyanuric acid
-
A rapid, mild and high-yielding method for dehydrogenation of a variety of structurally diverse 2-imidazolines to imidazoles jusing trichloroisocyanuric acid (TCCA) in the presence of DBU is reported. Chemoselective oxidation of 2-imidazolines can be achieved in the presence of sulfide and alcohol. The mild conditions of this procedure and the absence of any transition metal make this reaction suitable for safe laboratory use.
- Mohammadpoor-Baltork, Iraj,Zolfigol, Mohammad Ali,Abdollahi-Alibeik, Mohammad
-
p. 2803 - 2805
(2007/10/03)
-
- Penicillanic acid derivatives
-
6-Amidinopenicillanic acid derivatives wherein one of the nitrogen atoms of the amidino group is part of a heterocyclic ring having on a side chain an unsubstituted heterocyclic ring containing 2 to 3 nitrogen atoms, and being useful as an antibiotic.
- -
-
-
- 2,5-DIAZACYCLOPENTADIENYLIDENE: A STANDARD CARBENE OR A HIGHLY REACTIVE DIRADICAL?
-
2,5-Diazacyclopentadienylidene (2H-imidazolidene), generated either by photolysis or thermolysis from 2-diazo-2H-imidazole, reacts with benzene derivatives to give mainly a mixture of o-, m-, p-substitued 2-phenylimidazoles.The carbene shows a strong diradical character, in sharp contrast with the well-known behavior of cyclopentadienylidene.
- Bru, Nuria,Vilarrasa, Jaume
-
p. 1489 - 1492
(2007/10/02)
-
