Results 71 to 80 of about 6,769 (240)

effect of the macrocyclic cavity size on the selectivity of the metal ion [PDF]

, 2001
The single crystal structures of complexes [(CuLBr)-Br-1]ClO4 1, [(CuLBr)-Br-2]PF6 2, and [NiL2][ClO4](2) 3 were determined (L-1 is 3,6,9,15-tetraazabicyclo[9.3.1]pentadeca-1(15),11,13-triene and L-2 is 3,6,10,16-tetraazabicyclo[10.3.1]hexadeca-1(16),12 ...
Drew, MGB, Delgado, R, Resende, C, Felix, V, Duarte, MT, Costa, J   +5 more
core   +2 more sources

2,25-Dioxo-27,28-diphenyl-30-oxa-29-thia-3,10,17,24-tetraazapentacyclo[24.2.1.112,15.04,9.018,23]triaconta-5,7,9(4),10,12,14,16,18,20,22,26,28-dodecaene chloroform disolvate

Acta Crystallographica Section E, 2010
The macrocycle of the title compound, C36H24N4O3S·2CHCl3, contains a rigid framework with the nitrogen and oxygen heteroatoms pointing in towards the center of the macrocyclic cavity. The macrocycle is essentially planar (r.m.s.
Victor N. Khrustalev, Abel M. Maharramov, Evgeny A. Katayev, Rizvan K. Askerov, Vladimir V. Roznyatovsky   +4 more
doaj   +1 more source

Synthesis, Structure, and Characterization of Thiacalix[4]-2,8-thianthrene

Molecules, 2023
Sulfur-containing macrocycles have attracted substantial interest because they exhibit unique characteristics due to their polygonal ring-shaped skeleton.
Masafumi Ueda, Moe Isozaki, Yasuhiro Mazaki   +2 more
doaj   +1 more source

The effect of pressure and substituents on the size of pseudo-macrocyclic cavities in salicylaldoxime ligands [PDF]

CrystEngComm, 2008
The effect of pressure on the crystal structures of 3-chloro-, 3-methoxy-, 3-methyl- and 3-tert-butylsalicylaldoximes has been investigated. The compounds all form the dimeric structure found in salicylaldoxime form I at ambient pressure, which is based on intermolecular hydrogen bonds between the oximic hydrogen and the phenolic oxygen atoms across an
Wood, Peter A., Forgan, Ross S., Lennie, Alistair R., Parsons, Simon, Pidcock, Elna, Tasker, Peter A., Warren, John E.; id_orcid 0000-0002-8755-7981   +6 more
openaire   +4 more sources

Polynuclear complexes with macrocyclic ligands [PDF]

, 1996
A series of polynuclear macrocyclic complexes has been prepared by the Schiff-base condensation of 1,5-diaminopentan-3-ol with 2,6-diformyl-4-methyl-R-phenol (where R = Me or tBu) in the presence of transition metal template ions. The (2 + 2) macrocyclic
Wikaira, Jan
core   +1 more source

Synthesis and crystal structure of a heterobimetallic nickel–manganese 12-metallacrown-4 methanol disolvate monohydrate compound

Acta Crystallographica Section E: Crystallographic Communications, 2020
The synthesis and crystal structure of the title compound [systematic name: di-μ-acetato-tetrakis(μ4-N,2-dioxidobenzene-1-carboximidato)hexamethanoltetramanganese(III)nickel(II) methanol disolvate monohydrate], [Mn4Ni(C7H4NO3)4(C2H3O2)2(CH4O)6]·2CH4O·H2O
Abigail J. Hall, Matthias Zeller, Curtis M. Zaleski   +2 more
doaj   +1 more source

Optical, Electrochemical, Third-Order Nonlinear Optical Investigations of 3,4,5-Trimethoxy Phenyl Substituted Non-Aqueous Phthalocyanines

Frontiers in Chemistry, 2021
A new series of non-aqueous phthalocyanines having 3,4,5-trimethoxy phenyl group at peripheral positions in which the central cavity possessing Cu(II), Zn(II), and without metals has been synthesized, and its absorption, fluorescence (steady-state and ...
K. S. Srivishnu, K. S. Srivishnu, Dipanjan Banerjee, Ramya Athira Ramnagar, Jagannath Rathod, Lingamallu Giribabu, Lingamallu Giribabu, Venugopal Rao Soma   +7 more
doaj   +1 more source

Potentiometric Carboxylate Sensors Based on Carbazole-Derived Acyclic and Macrocyclic Ionophores

Chemosensors, 2020
Solid-contact ion-selective electrodes with carbazole-derived ionophores were prepared. They were characterized as acetate sensors, but can be used to determine a number of carboxylates. The potentiometric response characteristics (slope, detection limit,
Ville Yrjänä, Indrek Saar, Mihkel Ilisson, Sandip A. Kadam, Ivo Leito, Johan Bobacka   +5 more
doaj   +1 more source

Cycloazulenylene

Angewandte Chemie International Edition, EarlyView.
A strained macrocycle consisting solely of azulene subunits, named [6]cycloparaazulenylene ([6]CPA), is presented. The macrocycle exhibits a notably narrow HOMO–LUMO gap for a pristine azulene species, strain‐induced red‐shifted absorption, and an unusual tubular packing motif elucidated via single‐crystal XRD.
Clara Douglas, Josefine Sprachmann, David Dunlop, Joël Schlecht, Jörg Neudörfl, Tommy Wachsmuth, Julian Frost, Tomáš Slanina, Oliver Dumele   +8 more
wiley   +1 more source

Estudos dos equilibrios de formação de complexos ternarios formados entre o 1,4,7,13,16,19 - hexaza - 10,22 - dioxaciclotetracosano (OBISDIEN) e os sistemas Cu (II) - dipeptideos e Zn (II) - dipeptideos. Hidrolise e deuteração da glicilglicina [PDF]

, 1996
Tese (Doutorado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas.Os equilíbrios do OBISDIEN (1,4,7,13,16,19-hexaza-10,22-dioxaciclotetracosano), em presença e ausência dos íons metálicos cobre(II) e zinco(II), e dos ...
Luiz, Marilde Terezinha Bordignon
core