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Showing 1-30 of 39 results for "259160" within Papers
Yunfei Zhang et al.
Scientific reports, 5, 8172-8172 (2015-02-03)
Copper ions play a vital role in a variety of fundamental physiological processes not only in human beings and plants, but also for extensive insects and microorganisms. In this paper, a novel water-soluble ruthenium(II) complex as a turn-on copper(II) ions
Thermally-Triggered Crystal Dynamics and Permanent Porosity in the First Heptatungstate-Metalorganic Three-Dimensional Hybrid Framework.
Martin-Caballero J, et al.
Chemistry?A European Journal , 23(59), 14962-14974 (2017)
Michael Schmittel et al.
Chemical communications (Cambridge, England), 48(96), 11730-11732 (2012-10-20)
The two states of a new nanomechanical switch were quantitatively and reversibly populated in several subsequent switching cycles using either Cu(+) or cyclam as chemical inputs. State II was demonstrated to cis-trans isomerise diazastilbene upon irradiation selectively in the presence
Alexis D Ostrowski et al.
Molecular pharmaceutics, 9(10), 2950-2955 (2012-09-08)
Described are photochemical studies of the nitric oxide precursors, trans-Cr(L)(ONO)(2)(+) (L = cyclam = 1,4,8,11-tetraazacyclotetradecane, CrONO, or L = mac = 5,7-dimethyl-6-anthracenylcyclam, mac-CrONO) encapsulated in phosphatidylcholine liposomes. The liposomes provide a means to maintain a localized high concentration of NO
Characterization of a macrocyclic end-on peroxido copper complex.
Tobias Hoppe et al.
Angewandte Chemie (International ed. in English), 52(3), 870-873 (2012-11-28)
Luis G Alves et al.
Dalton transactions (Cambridge, England : 2003), 41(47), 14288-14298 (2012-10-09)
Novel Bn(2)Cyclam-based zirconium complexes of the type (Bn(2)Cyclam)Zr(X)(X') (3, X = X' = OPh; 4, X = X' = SPh; 5, X = Cl, X' = O(i)Pr) were synthesized in good yields via metathesis routes involving the reaction of the
Novel Zn (II) complexes with non-steroidal anti-inflammatory ligand, flufenamic acid: Characterization, topoisomerase I inhibition activity, DNA and HSA binding studies.
Smolkova R, et al.
Journal of Inorganic Biochemistry, 177(17), 143-158 (2017)
Prasenjit Mahato et al.
Inorganic chemistry, 50(9), 4162-4170 (2011-04-01)
Two chromogenic complexes, L.Zn (where L is (E)-4-((4-(1,4,8,11-tetraazacyclotetradecan-1-ylsulfonyl)phenyl)diazenyl)-N,N-dimethylaniline) and its [2]pseudorotaxane form (α-CD.L.Zn), were found to bind preferentially to adenosine triphosphate (ATP), among all other common anions and biologically important phosphate (AMP, ADP, pyrophosphate, and phosphate) ions in aqueous HEPES
Anna D Peters et al.
Organic & biomolecular chemistry, 16(35), 6479-6490 (2018-08-30)
A bis(cyclam)-capped cholesterol lipid designed to bind C-X-C chemokine receptor type 4 (CXCR4) was synthesised in good overall yield from 4-methoxyphenol through a seven step synthetic route, which also provided a bis(cyclam) intermediate bearing an octaethyleneglycol-primary amine that can be
Jan Blahut et al.
Inorganic chemistry, 59(14), 10071-10082 (2020-07-08)
In order to develop novel, more efficient, and/or selective contrast agents for magnetic resonance imaging (MRI), different modi operandi are explored as alternatives to water-relaxation enhancement. In this work, cobalt(II/III) complexes of bis(N-trifluoroethyl)cyclam derivatives with two acetate or two phosphonate
Jaeheung Cho et al.
Accounts of chemical research, 45(8), 1321-1330 (2012-05-23)
Metalloenzymes activate dioxygen to carry out a variety of biological reactions, including the biotransformation of naturally occurring molecules, oxidative metabolism of xenobiotics, and oxidative phosphorylation. The dioxygen activation at the catalytic sites of the enzymes occurs through several steps, such
A serials of sandwich-like trinuclear and one-dimensional chain cyanide-bridged iron (III)-copper (II) complexes: Syntheses, crystal structures and magnetic properties.
Shi J, et al.
Journal of Solid State Chemistry, 260(17), 59-66 (2018)
Riccardo Ferdani et al.
Dalton transactions (Cambridge, England : 2003), 41(7), 1938-1950 (2011-12-16)
A new class of cross-bridged cyclam-based macrocycles featuring phosphonate pendant groups has been developed. 1,4,8,11-tetraazacyclotetradecane-1,8-di(methanephosphonic acid) (CB-TE2P, 1) and 1,4,8,11-tetraazacyclotetradecane-1-(methanephosphonic acid)-8-(methanecarboxylic acid) (CB-TE1A1P, 2) have been synthesized and have been shown to readily form neutral copper(II) complexes at room temperature
Peter Comba et al.
Chemistry (Weinheim an der Bergstrasse, Germany), 18(6), 1700-1710 (2012-01-12)
The synthesis and characterization of a novel dinucleating ligand L (L=4,11-dimethyl-1,8-bis{2-[N-(di-2-pyridylmethyl)amino]ethyl}cyclam) and its μ-oxo-bridged diferric complex [(H(2)L){Fe(III)(2)(O)}(Cl)(4)](2+) are reported. This diiron(III) complex is the first example of a truly functional purple acid phosphatase (PAP) mimic as it accelerates the hydrolysis
Synthesis, characterization, DNA binding, topoisomerase I inhibition and antimicrobial activity of four novel zinc (II) fenamates.
Smolkova R, et al.
Polyhedron, 141(17), 230-238 (2018)
Joel Torres-Alacan et al.
Chemistry (Weinheim an der Bergstrasse, Germany), 18(10), 3043-3055 (2012-02-03)
The photochemistry of iron azido complexes is quite challenging and poorly understood. For example, the photochemical decomposition of [Fe(III)N(3)(cyclam-ac)]PF(6) ([1]PF(6)), where cyclam-ac represents the 1,4,8,11-tetraazacyclotetradecane-1-acetate ligand, has been shown to be wavelength-dependent, leading either to the rare high-valent iron(V) nitrido
Sean P Hopkins et al.
ACS applied materials & interfaces, 10(32), 27316-27325 (2018-07-22)
Ever since the role of endogenous nitric oxide (NO) in controlling a wide variety of biological functions was discovered approximately three decades back, multiple NO-releasing polymeric materials have been developed. However, most of these materials are typically short lived due
Ariel G De Candia et al.
Acta crystallographica. Section C, Crystal structure communications, 68(Pt 5), m121-m126 (2012-05-04)
Although it has not proved possible to crystallize the newly prepared cyclam-methylimidazole ligand 1-[(1-methyl-1H-imidazol-2-yl)methyl]-1,4,8,11-tetraazacyclotetradecane (L(Im1)), the trans and cis isomers of an Ni(II) complex, namely trans-aqua{1-[(1-methyl-1H-imidazol-2-yl)methyl]-1,4,8,11-tetraazacyclotetradecane}nickel(II) bis(perchlorate) monohydrate, [Ni(C(15)H(30)N(6))(H(2)O)](ClO(4))(2)·H(2)O, (1), and cis-aqua{1-[(1-methyl-1H-imidazol-2-yl)methyl]-1,4,8,11-tetraazacyclotetradecane}nickel(II) bis(perchlorate), [Ni(C(15)H(30)N(6))(H(2)O)](ClO(4))(2), (2), have been prepared and structurally
Cyclam (1,4,8,11-tetraazacyclotetradecane) with one methylphosphonate pendant arm: a new ligand for selective copper (II) binding.
F?zerova S, et al.
Dalton Transactions, 2908-2915 (2005)
Alexis D Ostrowski et al.
Inorganic chemistry, 50(10), 4453-4462 (2011-04-12)
Experimental and density functional theory (DFT) studies are described that are focused on outlining the reactivity of the known photochemical nitric oxide precursor trans-Cr(cyclam)(ONO)(2)(+) ("CrONO", cyclam = 1,4,8,11-tetrazacycltetradecane). Studies in both aerated and deaerated aqueous media are described as are
Anthony T S Lo et al.
PloS one, 6(5), e17446-e17446 (2011-05-17)
Cyclam was attached to 1-, 2- and 3-pyrrole lexitropsins for the first time through a synthetically facile copper-catalyzed "click" reaction. The corresponding copper and zinc complexes were synthesized and characterized. The ligand and its complexes bound AT-rich DNA selectively over
Edinilton Muniz Carvalho et al.
Journal of inorganic biochemistry, 210, 111133-111133 (2020-07-04)
Nitric oxide (NO) and nitroxyl (HNO) have gained broad attention due to their roles in several physiological and pathophysiological processes. Remarkably, these sibling species can exhibit opposing effects including the promotion of angiogenic activity by NO compared to HNO, which
Jing Li et al.
Biomacromolecules, 13(10), 3220-3227 (2012-09-26)
A series of reducible polycationic copper chelators (RPCs) based on 1,4,8,11-tetraazacyclotetradecane (cyclam) were synthesized by Michael addition. Molecular weight of the polycations was controlled by reaction stoichiometry and reaction conditions, resulting in polymers with molecular weights ranging from 4400 to
Sweta Singh et al.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 153, 566-571 (2015-10-06)
2,2',2″-(11-(2-((4-mercapto-1-methoxy-1-oxobutan-2-yl)amino)-2-oxoethyl)-1,4,8,11-tetraaza cyclotetradecane-1,4,8-triyl)triacetic acid, Met-ac-TE3A and (E)-N-methyl-2-((E)-3-(2-(2-(5-((3aS,4S,6aR)-2-oxohexahydro-1H-thieno[3,4-d]imidazol-4-yl)pentanoyl)hydrazinecarbono-thioyl)hydrazonobutan-2-ylidene)hydrazinecarbothioamide, Bis(thiosemicarbazone)- Biotin were synthesized and evaluated for imaging application. The pharmacokinetics of these ligands were determined by tracer methods. In vitro human serum stability of (99m)Tc Met-ac-TE3A/(99m)Tc Bis(thiosemicarbazone)-Biotin after 24h was found to be
Apurba Kalita et al.
Inorganic chemistry, 50(23), 11868-11876 (2011-11-02)
The nitric oxide reactivity of two copper(II) complexes, 1 and 2 with ligands L(1) and L(2), respectively, [L(1) = 5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane, L(2) = 5,5,7-trimethyl-[1,4]-diazepane] have been studied. The copper(II) center in complex 1 was found to be unreactive toward nitric oxide
Yair Lavi et al.
Chemistry (Weinheim an der Bergstrasse, Germany), 17(18), 5188-5192 (2011-04-06)
An electron exchange column (analogous to ion exchange columns) was developed using the unique redox properties of the nickel-tetraazamacrocyclic complexes (nickel cyclam [Ni(II)L(1)](2+)) and nickel-trans-III-meso-5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane, ([Ni(II)L(2)](2+)), and the physical and chemical stability of the ceramic materials using the sol-gel process
Thomas Fenton et al.
Dalton transactions (Cambridge, England : 2003), 46(32), 10721-10726 (2017-06-09)
Coupling with robust surfaces is a promising approach to improve the stability and recyclability of highly active molecular catalysts. This study builds on our prior success to deposit a Co(iii) cyclam complex, where cyclam is 1,4,8,11-tetraazacyclotetradecane, on mesoporous silica via
Mingfeng Yu et al.
Inorganic chemistry, 50(24), 12823-12835 (2011-11-25)
We describe the synthesis of cyclam metal complexes derivatized with amino acids or a tripeptide using a copper(I)-catalyzed Huisgen "click" reaction. The linker triazole formed during the synthesis plays an active coordinating role in the complexes. The reaction conditions do
Jacky Pouessel et al.
Chemistry, an Asian journal, 6(6), 1582-1594 (2011-05-11)
Synthesis and characterization of three new polyamine receptors, composed of a cyclam unit (cyclam=1,4,8,11-tetraazacyclotetradecane) linked by a 2,6-dimethylpyridinyl spacer to the linear polyamines 1,4,8,11-tetraazaundecane (L1py), 1,4,7-triazaheptane (L2py), and to a quaternary ammonium group (L3py(+)), are reported. All receptors form highly
Genevieve E Romanowicz et al.
Redox biology, 1, 332-339 (2013-09-12)
Nitric oxide (NO) is an ubiquitous signaling molecule of intense interest in many physiological processes. Nitric oxide is a highly reactive free radical gas that is difficult to deliver with precise control over the level and timing that cells actually
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