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Sensitive marker bands for the detection of spin states of heme in surface-enhanced resonance Raman scattering spectra of metmyoglobin

22-10-2014 | Yasutaka Kitahama; Masatoshi Egashira; Toshiaki Suzuki; Ichiro Tanabe; Yukihiro Ozaki, Analyst, 2014

Surface-enhanced resonance Raman scattering (SERRS) spectra of myoglobin (Mb) with various ligands were measured. In the resonance Raman scattering (RRS) spectra, the peaks around at 1610 and 1640 cm–1 have been used to discriminate between the heme iron in high or low spin state so far. In the ...

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Modulation of active site electronic structure by the protein matrix to control [NiFe] hydrogenase reactivity

22-10-2014 | Dayle M. A. Smith; Simone Raugei; Thomas C. Squier, Physical Chemistry Chemical Physics, 2014

Control of the reactivity of the nickel center of the [NiFe] hydrogenase and other metalloproteins commonly involves outer coordination sphere ligands that act to modify the geometry and physical properties of the active site metal centers. We carried out a combined set of classical molecular ...

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Influence of Self-assembly on Intercalative DNA Binding Interaction of Double-chain Surfactant Co(III) Complexes Containing Imidazo[4,5-f][1,10]phenanthroline and Dipyrido[3,2-d:2’-3’-f]quinoxaline ligands: Experimental and Theoretical Study

22-10-2014 | Karuppiah Nagaraj; Gunasekaran Velmurugan; Subramanian sakthinathan; Ponnambalam Venuvanalingam; Sankaralingam Aruna ..., Dalton Transactions, 2014

A new class of surfactant cobalt(III) complexes, cis-[Co(ip)2(C12H25NH2)2](ClO4)3 (1) and cis-[Co(dpq)2(C12H25NH2)2](ClO4)3 (2) (ip = imidazo[4,5-f][1,10]phenanthroline, dpq = dipyrido[3,2-d:2’-3’-f]quinoxaline), have been synthesized and characterized by various spectroscopic and ...

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In vitro HER2 protein-induced affinity dissociation of carbon nanotube-wrapped anti-HER2 aptamers for HER2 protein detection

22-10-2014 | Javed H. Niazi; Sandeep Kumar Verma; Sarfaraj Niazi; Anjum Qureshi, Analyst, 2014

A new in vitro assay was developed to detect human epidermal growth factor receptor 2 (HER2) protein based on affinity dissociation of carbon nanotube (CNT)-wrapped anit-HER2 ssDNA aptamers. First, we selected an anti-HER2 ssDNA aptamer (H2) using an in vitro Serial Evolution of Ligands by ...

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Synthesis and Biological Evaluation of (−)-Kainic Acid Analogues as Phospholipase D-Coupled Metabotropic Glutamate Receptor Ligands

22-10-2014 | Chiara - Zanato; Sonia - Watson; Guy S. Bewick; Matteo Zanda; William T Harrison, Organic & Biomolecular Chemistry, 2014

(−)-Kainic acid potently increases stretch-induced afferent firing in muscle spindles, probably acting through a hitherto uncloned phospholipase D (PLD)-coupled mGlu receptor. Structural modification of (−)-kainic acid was undertaken to explore the C-4 substituent effect on the pharmacology ...

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Syntheses of Polypyridyl Metal Complexes and Studies of their Interaction with Quadruplex DNA

22-10-2014 | Verity S Stafford; Kogularamanan Suntharalingam; Arun Shivalingam; Andrew J P White; David J Mann; Ramon Vilar, Dalton Transactions, 2014

A series of mono- and bi-metallic metal complexes (with CuII, PtII and ZnII) with substituted polypyridyl ligands have been prepared and their binding affinities towards quadruplex (c-Myc and human telomeric) and duplex DNA (ds26 and calf thymus) determined using fluorescent indicator ...

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Chiral Mononuclear Lanthanide Complexes and the Field-induced Single-ion Magnet Behaviour of Dy Analogue

21-10-2014 | Shuang-Yan Lin; Chao Wang; Lang Zhao; Jianfeng Wu; Jinkui Tang, Dalton Transactions, 2014

Three pairs of homochiral mononuclear lanthanide complexes, with general formula [LnH4LRRRRRR/SSSSSS(SCN)2](SCN)2•xCH3OH•yH2O (Ln = Dy (R/S-Dy1), Ho (R/S-Ho1) and Er (R/S-Er1)), have been obtained via self-assembly between chiral macrocyclic ligands and respective thiocyanates, all of which show ...

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Tripodal tris(hydroxypyridinone) ligands for immunoconjugate PET imaging with 89Zr4+: comparison with desferrioxamine-B

21-10-2014 | Michelle Ma; Levente K Meszaros; Brett Michael Paterson; David Berry; Maggie S Cooper; Yongmin Ma; Robert Hider; Phi ..., Dalton Transactions, 2014

Dalton Trans., 2014, Accepted ManuscriptDOI: 10.1039/C4DT02978J, Paper Michelle Ma, Levente K Meszaros, Brett Michael Paterson, David Berry, Maggie S Cooper, Yongmin Ma, Robert Hider, Philip J BlowerThis is an Accepted Manuscript, which has been through the RSC Publishing peer review process and ...

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Self-assembly of metal-organic coordination networks using on-surface synthesized ligands

21-10-2014 | Tao Lin; Guowen Kuang; Xue Song Shang; Pei Nian Liu; Nian Lin, Chemical Communication, 2014

Supramolecular assembly and on-surface synthesis are two widely-used methods for constructing low-dimensional molecular nanostructures on surface. Here we describe an approach that combines both methods to create two-dimensional metal-organic networks with exceptionally large pores.

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A heterotrimetallic Ir(III), Au(III) and Pt(II) complex incorporating cyclometallating bi- and tridentate ligands: simultaneous emission from different luminescent metal centres leads to broad-band light emission

21-10-2014 | Rebeca Muñoz-Rodríguez; Elena Buñuel; Noelia Fuentes; J. A. Gareth Williams; Diego J. Cárdenas, Dalton Transactions, 2014

Di- and tri-nuclear metal complexes incorporating gold(iii), iridium(iii) and platinum(ii) units linked via a 1,3,5-triethynylbenzene core are reported, together with the corresponding mononuclear complexes as models. The gold(iii) and platinum(ii) units comprise tridentate, cyclometallating, ...

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