Results 131 to 140 of about 91,424 (147)

A Simplified Approach to N- and N,N′-Linked 1,2,4-Triazoles by Transamination

, 2008
A facile one-step procedure for the preparation of 4,4'-bis-1,2,4-triazole is reported. Direct transamination of N,N-dimethylformamide azine dihydrochloride by heating with 4-amino-1,2,4-triazole in refluxing benzene readily yields the target molecule in
A. D. Naik, J. Marchand‐Brynaert, Y. Garcia   +2 more
semanticscholar   +1 more source

Controlling Aggregation in Highly Emissive Pt(II) Complexes Bearing Tridentate Dianionic N∧N∧N Ligands. Synthesis, Photophysics, and Electroluminescence

, 2011
Neutral Pt(II) complexes bearing tridentate dianionic 2,6-bis(1H-1,2,4-triazol-5-yl)pyridine and ancillary alkyl-substituted pyridine ligands have been synthesized and characterized. They show bright green emission, reaching 73% photoluminescence quantum
Mathias Mydlak, M. Mauro, Federico Polo, M. Felicetti, J. Leonhardt, G. Diener, L. Cola, C. Strassert   +7 more
semanticscholar   +1 more source

Introducing Catalytic Diversity into Single-Site Chabazite Zeolites of Fixed Composition via Synthetic Control of Active Site Proximity

, 2017
We report a synthesis–structure–function relation describing how different routes to crystallize single tetrahedral-site (T-site) zeolites of fixed composition lead to different arrangements of framework Al atoms and, in turn, of extraframework proton ...
J. R. D. Iorio, Claire T. Nimlos, Rajamani Gounder   +2 more
semanticscholar   +1 more source

Solution of the One‐Dimensional N‐Body Problems with Quadratic and/or Inversely Quadratic Pair Potentials

, 1971
The quantum‐mechanical problems of N 1‐dimensional equal particles of mass m interacting pairwise via quadratic (``harmonical'') and/or inversely quadratic (``centrifugal'') potentials is solved.
F. Calogero
semanticscholar   +1 more source

New approaches to the analysis of high connectivity materials: design frameworks based upon 4(4)- and 6(3)-subnet tectons.

Accounts of Chemical Research, 2005
Coordination framework polymers derived from lanthanide metal ions with N,N'-dioxide ligands (4,4'-bipyridine-N,N'-dioxide, pyrazine-N,N'-dioxide, 1,2-bis(pyridin-4-yl)ethane-N,N'-dioxide, trans-1,2-bis(pyridin-4-yl)ethene-N,N'-dioxide) exhibit such ...
R. Hill, D. Long, N. Champness, P. Hubberstey, M. Schröder   +4 more
semanticscholar   +1 more source

The Decamethylferrocenium/Decamethylferrocene Redox Couple: A Superior Redox Standard to the Ferrocenium/Ferrocene Redox Couple for Studying Solvent Effects on the Thermodynamics of Electron Transfer

, 1999
The solvent dependence of the formal redox potentials of the ferrocenium/ferrocene (Fc+/0) and 1,2,3,4,5-pentamethylferrocenium/1,2,3,4,5-pentamethylferrocene (Me5Fc+/0) couples versus the decamethylferrocenium/decamethylferrocene (Me10Fc+/0) couple ...
I. Noviandri, Kylie N. Brown, D. S. Fleming, P. Gulyás, P. A. Lay, A. Masters, L. Phillips   +6 more
semanticscholar   +1 more source

Synthesis and biological evaluation of N-naphthoyl-phenylglyoxamide-based small molecular antimicrobial peptide mimics as novel antimicrobial agents and biofilm inhibitors.

Organic and biomolecular chemistry, 2016
Antimicrobial peptides (AMPs) are a key component of the human immune system. Synthetic AMP mimics represent a novel strategy to counteract the increasing incidence of antimicrobial resistance.
Shashidhar Nizalapur, K. Ho, Önder Kimyon, Eugene Yee, Thomas Berry, M. Manefield, C. Cranfield, M. Willcox, D. Black, N. Kumar   +9 more
semanticscholar   +1 more source

On the Reality of the Eigenvalues for a Class of -Symmetric Oscillators

, 2002
We study the eigenvalue problem with the boundary conditions that decays to zero as z tends to infinity along the rays , where is a real polynomial and . We prove that if for some we have for all , then the eigenvalues are all positive real.
Öö Þ ¾ ¦ ¾ Ñ·¾¸ûûûöö È ´þµ ½ Þ Ñ ½ · ¾ Þ Ñ ¾ · ¡ ¡ ¡ Öööð, Ôóðýòóñññð Òò, Ñ º, Ï Ôöóú, Øøøø Óö ×óññ ½ Ñ ¾ ¸ Û Ú ´ Μ ¼ Óö Ðð, È þµ ½ Þ Ñ ½ · ¾ Þ Ñ ¾ · ¡ ¡ ¡ · Ñ ½ Þ Ûûøø Ðð   +5 more
semanticscholar   +1 more source

Structure-activity relationships for cytotoxic ruthenium(II) arene complexes containing N,N-, N,O-, and O,O-chelating ligands.

Journal of Medicinal Chemistry, 2006
We report structure-activity relationships for organometallic RuII complexes of the type [(eta6-arene)Ru(XY)Cl]Z, where XY is an N,N- (diamine), N,O- (e.g., amino acidate), or O,O- (e.g., beta-diketonate) chelating ligand, the arene ranges from benzene ...
Abraha Habtemariam, Michael Melchart, R. Fernández, S. Parsons, I. Oswald, A. Parkin, F. Fabbiani, James E. Davidson, A. Dawson, R. Aird, D. Jodrell, P. Sadler   +11 more
semanticscholar   +1 more source

Information theory and coding

, 1963
(a) Show that for an alphabet of unlimited size, it is possible to create a uniquely decodable prefix code for its letters such that their average codeword length is no more than 2 bits, provided that the alphabet letters obey a certain probability ...
N. Abramson
semanticscholar   +1 more source