نتایج جستجو برای: p sulfonatocalix 4 arene

تعداد نتایج: 2317668  

Journal: :journal of physical & theoretical chemistry 2011
m. faraji k. zare a. farajtabar f. gharib

the interaction of p-sulphonatocalix [6] arene towards l-arginine and l-lysine has been studied inacidic aqueous solution (p1-1 2) using uv-vis spectrophotometric titration technique. the psulphonatocalix[6] arene was found to be able to form 1:1 complexe with amino acids in water.the values of the association constant were determined at different temperatures to evaluate thethermodynamic funct...

Journal: :Chimia 2015
Robyn E Fairbairn Simon J Teat Kevin J Gagnon Scott J Dalgarno

p-Carboxylatocalix[n]arenes have emerged as useful building blocks for the construction of a diverse range of supramolecular assemblies. A convenient route to a p-carboxylatocalix[4]arene that is locked in a partial-cone conformation is presented. The conformation gives the molecule markedly different topological directionality relative to those previously used in self- and metal-directed assem...

Journal: :Acta Crystallographica Section C Crystal Structure Communications 1993

2003
Mongkol Sukwattanasinitt Rojrit Rojanathanes Siriporn Jiwpanich Thawatchai Tuntulani Vithaya Ruangpornvisuti

Reaction of 25,27-bis-(3-formylphenoxyethoxy)-p-tert-butylcalix[4]arene (1) with 20% mole of KCN in ethanol and i-propanol yielded monoethylester (2) (50%) and monoisopropylester (3) (15%). Compound 1 was not oxidized by air in the absence of KCN under reflux. The Cannizzaro reaction of 1 in ethanol using KOH gave bis-alcohol (4), acid-alcohol (5).

2018
Florian Mayer Sriram Tiruvadi Krishnan Daniel T. Schühle Svetlana V. Eliseeva Stéphane Petoud Éva Tóth Kristina Djanashvili

Self-aggregating calix[4]arenes carrying four DOTA ligands on the upper rim for stable complexation of paramagnetic GdIII-ions have already been proposed as MRI probes. In this work, we investigate the luminescence properties of TbIII-DOTA-calix[4]arene-4OPr containing four propyl-groups and compare them with those of the analog substituted with a phthalimide chromophore (TbIII-DOTA-calix[4]are...

Journal: :journal of physical & theoretical chemistry 2011
m. sayadian k. zare f. mollaamin

an azobenzene bridge was introduced into the lower (or smaller) rim of p-tert-butylcalix[8]arene to form 1,5-singly bridged calix[8]arene derivatives, respectively. bridged calix[8]arene of conformationally rigid wereisolated. the stability of the two structures of bridged calix[8]arenes have been compared.the study of organicstructure to form nanoporous structures is a well known in chemistry ...

Journal: :Acta Crystallographica Section E Structure Reports Online 2010

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